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Cytomegalovirus Shedding Characteristics in Pregnant Women

An Observational, Longitudinal, Natural History, Feasibility Cohort Study to Evaluate the Characteristics of Cytomegalovirus (CMV) Shedding in CMV Seropositive Women Throughout Pregnancy

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT04021628
Acronym
cCHIPS
Enrollment
160
Registered
2019-07-16
Start date
2019-04-01
Completion date
2021-12-01
Last updated
2024-06-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

CMV, Congenital Cmv, Maternal Infections Affecting Fetus or Newborn, Shedding Virus

Keywords

cmv, cytomegalovirus, shedding, excretion, congenital, cCMV, seropositive, maternal

Brief summary

The cCHIPS study is a feasibility study for larger scale multi-centre studies and is designed as a single-centre observational cohort, longitudinal, natural history study. The overarching aim of this study is to evaluate the feasibility of performing larger scale, multi-centre studies to evaluate the relationship between CMV shedding in pregnancy with congenital CMV (cCMV). There is no randomisation involved in this study and all participants will perform the same study procedures and receive treatment as usual. The primary (main) objective is to evaluate the prevalence (percentage of occurrence) of CMV shedding in saliva, urine and vaginal secretions of CMV seropositive women throughout pregnancy. The secondary objectives are to evaluate the quantity of CMV shedding in saliva, urine and vaginal secretions of CMV seropositive women throughout pregnancy, to compare the prevalence and quantity of CMV shedding in CMV seropositive women between different sources of shedding (saliva, urine or vaginal secretions) and different gestational stages, to identify risk factors for CMV shedding in CMV seropositive pregnant women, to evaluate the acceptability of the study procedures to the participating pregnant women, to evaluate the proportion of women approached who are recruited into the study and who are completing the study, and to evaluate the relationship between CMV specific cell mediated immunity (a type of immune protection following exposure to CMV) and CMV shedding in CMV seropositive pregnant women. The tertiary objective is to compare the evaluation of CMV specific T cell immune responses (a type of CMV specific cell mediated immunity) between the two commercially available CMV-specific T cell immune response assays which are QuantiFERON-CMV and CMV-ELISPOT assays. This study will aim to recruit 200 pregnant women. This study will be undertaken in parallel with a separate study called RACE-FIT (REC reference number 18/SC/0360, IRAS ID 239977), which will have ethical approval to screen pregnant women with children less than 4 years of age booked for their antenatal care at St George's Hospital, London, identified during the antenatal combined screening bloods appointment or the antenatal booking appointment, for their CMV serology status on a sample of blood collected as part of the screening process. As part of the ethical approval sought for the RACE-FIT study and the cCHIPS study, the pregnant women screened and found to be CMV seronegative will be eligible for recruitment into the RACE-FIT study and those screened and found to be CMV seropositive will be eligible and approached for recruitment into the cCHIPS study. The cCHIPS study aim to recruit over a 6 month period. The study involves four visits (Visit 1, Visit 2, Visit 3, Visit 4) for each participant. The total study period for each participant will be between 6 to 8 months.

Detailed description

The potential participants will be contacted via telephone, email and/or post by the study team. They will be screened for their eligibility, and if they are interested in participating, the first study visit (Visit 1) will be arranged where the written informed consent will be obtained then before any study related procedures. Visit 1 will be held as soon as possible following screening, aiming up to 16 weeks and 6 days gestational age (early in pregnancy). Visit 2 will be aimed to coincide with the routine 20 gestational week appointment or any time in second trimester from 17 weeks and 0 days gestational age to 27 weeks and 6 days gestational age (middle of pregnancy). Visit 3 will be aimed to coincide with the routine 28 gestational week appointment or any time in the third trimester from 28 weeks and 0 days gestational age onwards (late in pregnancy), Visit 4 will be aimed to coincide with the participant's routine admission on the labour ward or postnatal ward after giving birth, or anytime from the time of birth to 1 week postnatal age (postpartum period). At each study visit, the participants will be performing their own study samples of saliva, urine and vaginal secretions using the study specific self-sampling instructions provided. These self-samples will be tested for the presence and quantity of CMV DNA detected via a molecular technique called polymerase chain reaction (PCR). If consent is obtained, a blood sample will also be collected at each study visit to test for cellular mediated immunity. At the last visit, the participant will be offered to have her newborn baby tested for congenital CMV by collecting the newborn's saliva sample which will be tested for CMV DNA via PCR. At each study visit, the participant will complete a short questionnaire on the participant's contact with their child(ren)'s saliva and urine (to identify risk factors for CMV shedding). At Visit 1, the participant will complete a background questionnaire (also to identify risk factors for CMV shedding)and at Visit 4 a feedback questionnaire (to assess feasibility). Where possible the study visits and blood samples will be aimed to take place alongside the participants' routine antenatal appointments and routine blood tests respectively. At the end of the study, up to 20 participants will be invited to take part in a process evaluation in the form of an interview by phone, skype or face to face to explore in depth the experiences of participation in the study.

Interventions

OTHERNo intervention- not applicable

No intervention - not applicable

Sponsors

St George's University Hospitals NHS Foundation Trust
CollaboratorOTHER
St George's, University of London
Lead SponsorOTHER

Study design

Observational model
COHORT
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to No maximum

Inclusion criteria

* Pregnant * CMV seropositive * Willing and able to provide informed consent * Living with child(ren), at least one of whom is less than four years old * Willing to have saliva, urine and vaginal secretion sampling to be tested for CMV PCR * Willing to be followed up until the postpartum period

Exclusion criteria

* Age less than 18 years * Evidence of acute maternal CMV infection at the time of screening * Documented immunodeficiency of any aetiology including the use of oral steroid therapy equivalent to \>1mg/kg of prednisone per day for more than one week * In the opinion of the investigator is unlikely to comply with the study procedures * In the opinion of the investigator does not have adequate understanding or verbal and written English

Design outcomes

Primary

MeasureTime frameDescription
The Prevalence of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women in Pregnancy8 monthsThe percentage of participants with detectable CMV virus (detected via polymerase chain reaction) in any bodily fluid (saliva, urine or vaginal secretions) at any point in pregnancy, and the percentage of participants with detectable CMV virus in each bodily fluid (saliva, urine and vaginal secretions) at any point in pregnancy.

Secondary

MeasureTime frameDescription
The Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum8 monthsThe quantity of detectable CMV virus (measured via quantitative polymerase chain reaction in IU/ml) in saliva, urine and vaginal secretions at individual study visits
The Proportion of Pregnant Women Approached Who Are Recruited Into the Study8 monthsThe percentage of women approached who are then recruited into the study
The Proportion of Participating Pregnant Women Completing the Study8 months
The Acceptability of the Study Procedures to Participating Pregnant Women8 monthsDescriptive summary of the mean scores of each feedback statement (scale 1 to 5, where higher score was indicative of higher agreement to the feedback statement) from the Feedback Questionnaire completed by participants at the last study visit
The Association of Demographics With CMV Shedding in CMV Seropositive Women in Pregnancy8 monthsThe multiple logistic regression of CMV shedding as an outcome (dependent variable; detected or not detected) at any visit during pregnancy with demographic factors (independent variable) as a predictor, adjusted for all demographic variables described, using odds ratio in the results between CMV seropositive women with CMV shedding and without CMV shedding, with 95% confidence interval.
The Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and Postpartum8 monthsThe association between CMV shedding detection and the specific types of contact with child(ren)'s bodily fluids as assessed in the contact questionnaire at each visit, performed using logistic regression (CMV shedding detection as the outcome variable, the specific types of contact with children's bodily fluids as the predictor varible), adjusted for age, ethnicity, education, and amount of children, with the detection of shedding as a binary outcome, using odds ratio in the results between CMV-seropositive with CMV shedding and without CMV shedding, with 95% confidence intervals.
The Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum8 monthsThe proportion of detectable CMV virus (measured via polymerase chain reaction) in saliva, urine and vaginal secretions at individual study visits
The Prevalence of CMV-specific T-cell Immune Responses as Measured by CMV-ELISPOT in CMV Seropositive Women in Pregnancy8 monthsThe percentage of the number of participants with responsive CMV-ELISPOT results over the total number of participants tested with CMV-ELISPOT at any point in pregnancy
The Proportion of CMV-specific T-cell Immune Responses as Measured by CMV-QuantiFERON in CMV Seropositive Women Throughout Pregnancy and Postpartum8 monthsThe percentage of the number of participants with positive CMV-QuantiFERON results over the total number of participants tested for CMV-QuantiFERON at each study visit
The Proportion of CMV-specific T-cell Immune Responses as Measured by CMV-ELISPOT in CMV Seropositive Women Throughout Pregnancy and Postpartum8 monthsThe percentage of the number of participants with responsive CMV-ELISPOT results (a positive spot count to IE-1 and/or pp65 antigen) over the total number of participants tested for CMV-ELISPOT at each study visit
The Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-QuantiFERON8 monthsThe logistic regression of CMV shedding as an outcome (dependent variable; detected or not detected) at a visit with CMV-QuantiFERON assay results (independent variable; positive or negative) as a predictor at the reciprocal visit, adjusted for age and ethnicity, using odds ratio in the results between CMV seropositive women with CMV shedding and without CMV shedding, with 95% confidence interval.
The Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-ELISPOT8 monthsThe logistic regression of CMV shedding as an outcome (dependent variable; detected or not detected) at a visit with CMV-ELISPOT assay results (independent variable; spot count) as a predictor at the reciprocal visit, adjusted for age and ethnicity, using odds ratio in the results between CMV seropositive women with CMV shedding and without CMV shedding, with 95% confidence interval.
The Prevalence of CMV-specific T-cell Immune Responses as Measured by CMV-QuantiFERON in CMV Seropositive Women in Pregnancy8 monthsThe percentage of the number of participants with positive CMV-QuantiFERON results over the total number of participants tested with CMV-QuantiFERON at any point in pregnancy

Countries

United Kingdom

Participant flow

Participants by arm

ArmCount
All Participants Belonged to the Same Group
All participants belonged to the same group (non-interventional, observational cohort study)
160
Total160

Baseline characteristics

CharacteristicAll Participants Belonged to the Same Group
Age, Categorical
<=18 years
0 Participants
Age, Categorical
>=65 years
0 Participants
Age, Categorical
Between 18 and 65 years
160 Participants
Race/Ethnicity, Customized
Ethnicity
Asian Other
9 Participants
Race/Ethnicity, Customized
Ethnicity
Black
8 Participants
Race/Ethnicity, Customized
Ethnicity
Mixed
11 Participants
Race/Ethnicity, Customized
Ethnicity
Other
1 Participants
Race/Ethnicity, Customized
Ethnicity
South Asian
23 Participants
Race/Ethnicity, Customized
Ethnicity
White British
69 Participants
Race/Ethnicity, Customized
Ethnicity
White Other
39 Participants
Region of Enrollment
United Kingdom
160 Participants
Sex: Female, Male
Female
160 Participants
Sex: Female, Male
Male
0 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
0 / 160
other
Total, other adverse events
11 / 160
serious
Total, serious adverse events
11 / 160

Outcome results

Primary

The Prevalence of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women in Pregnancy

The percentage of participants with detectable CMV virus (detected via polymerase chain reaction) in any bodily fluid (saliva, urine or vaginal secretions) at any point in pregnancy, and the percentage of participants with detectable CMV virus in each bodily fluid (saliva, urine and vaginal secretions) at any point in pregnancy.

Time frame: 8 months

Population: The total number of participants with all complete data (no missing data)

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
All Participants Belonged to the Same GroupThe Prevalence of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women in PregnancyPrevalence in any bodily fluid27 Participants
All Participants Belonged to the Same GroupThe Prevalence of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women in PregnancyPrevalence in saliva4 Participants
All Participants Belonged to the Same GroupThe Prevalence of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women in PregnancyPrevalence in urine16 Participants
All Participants Belonged to the Same GroupThe Prevalence of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women in PregnancyPrevalence in vaginal secretions20 Participants
Secondary

The Acceptability of the Study Procedures to Participating Pregnant Women

Descriptive summary of the mean scores of each feedback statement (scale 1 to 5, where higher score was indicative of higher agreement to the feedback statement) from the Feedback Questionnaire completed by participants at the last study visit

Time frame: 8 months

Population: Total number of participant who completed the Feedback Questionnaire at Visit 4 (last study visit)

ArmMeasureValue (MEAN)
All Participants Belonged to the Same GroupThe Acceptability of the Study Procedures to Participating Pregnant Women4.03 Score on a scale
Visit 1 UrineThe Acceptability of the Study Procedures to Participating Pregnant Women4.57 Score on a scale
Visit 1 Vaginal SecretionsThe Acceptability of the Study Procedures to Participating Pregnant Women4.38 Score on a scale
Visit 2 SalivaThe Acceptability of the Study Procedures to Participating Pregnant Women4.48 Score on a scale
Visit 2 UrineThe Acceptability of the Study Procedures to Participating Pregnant Women4.50 Score on a scale
Visit 2 Vaginal SecretionsThe Acceptability of the Study Procedures to Participating Pregnant Women4.22 Score on a scale
Visit 3 SalivaThe Acceptability of the Study Procedures to Participating Pregnant Women3.98 Score on a scale
Visit 3 UrineThe Acceptability of the Study Procedures to Participating Pregnant Women4.43 Score on a scale
Visit 3 Vaginal SecretionsThe Acceptability of the Study Procedures to Participating Pregnant Women4.52 Score on a scale
Visit 4 SalivaThe Acceptability of the Study Procedures to Participating Pregnant Women4.45 Score on a scale
Visit 4 UrineThe Acceptability of the Study Procedures to Participating Pregnant Women4.55 Score on a scale
Visit 4 Vaginal SecretionsThe Acceptability of the Study Procedures to Participating Pregnant Women4.59 Score on a scale
Satisfied With Information Received at Recruitment Visit (Visit 1) and Understood Next StepsThe Acceptability of the Study Procedures to Participating Pregnant Women4.57 Score on a scale
Willing to Complete the Background QuestionnaireThe Acceptability of the Study Procedures to Participating Pregnant Women4.64 Score on a scale
Willing to Complete the Contact Questionnaire at All Study VisitsThe Acceptability of the Study Procedures to Participating Pregnant Women4.62 Score on a scale
The Self-sampling Written Instructions Were Simple and ClearThe Acceptability of the Study Procedures to Participating Pregnant Women4.53 Score on a scale
Willing to Perform Self-sampling of Saliva Samples for All Study VisitsThe Acceptability of the Study Procedures to Participating Pregnant Women4.71 Score on a scale
Willing to Perform Self-sampling of Urine Samples for All Study VisitsThe Acceptability of the Study Procedures to Participating Pregnant Women4.64 Score on a scale
Willing to Perform Self-sampling of Vaginal Secretions for All Study VisitsThe Acceptability of the Study Procedures to Participating Pregnant Women4.26 Score on a scale
Willing to Perform All Self-sampling for All Study VisitsThe Acceptability of the Study Procedures to Participating Pregnant Women4.40 Score on a scale
Willing to Have Blood Samples Taken for All Study VisitsThe Acceptability of the Study Procedures to Participating Pregnant Women4.36 Score on a scale
Willing to Have Additional Blood Samples Taken on Top of Routine Antenatal Blood SamplesThe Acceptability of the Study Procedures to Participating Pregnant Women4.16 Score on a scale
Happy to Have the Option to Test Newborn for Congenital CMVThe Acceptability of the Study Procedures to Participating Pregnant Women4.52 Score on a scale
Willing to be Part of All Four Study VisitsThe Acceptability of the Study Procedures to Participating Pregnant Women4.71 Score on a scale
Study Visit Timeline Was Not TroublesomeThe Acceptability of the Study Procedures to Participating Pregnant Women4.59 Score on a scale
Happy to Receive Study Visit Text RemindersThe Acceptability of the Study Procedures to Participating Pregnant Women4.74 Score on a scale
Willing to Attend Study Visits That do Not Coincide With Routine Antenatal AppoinmentsThe Acceptability of the Study Procedures to Participating Pregnant Women3.31 Score on a scale
Prefer to Have Study Visits at the Same Time as Routine Antenatal AppointmentsThe Acceptability of the Study Procedures to Participating Pregnant Women4.62 Score on a scale
Prefer to Have Study Visits at HomeThe Acceptability of the Study Procedures to Participating Pregnant Women3.22 Score on a scale
Willing to Contact Study Team When in Labour or Soon After BirthThe Acceptability of the Study Procedures to Participating Pregnant Women4.09 Score on a scale
Willing to Have Study Visit Soon After Birth Whilst Still in HospitalThe Acceptability of the Study Procedures to Participating Pregnant Women4.38 Score on a scale
Willing to Have Study Visit With Newborn in Hospital/Clinic After Already Being Discharged HomeThe Acceptability of the Study Procedures to Participating Pregnant Women3.14 Score on a scale
Secondary

The Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-ELISPOT

The logistic regression of CMV shedding as an outcome (dependent variable; detected or not detected) at a visit with CMV-ELISPOT assay results (independent variable; spot count) as a predictor at the reciprocal visit, adjusted for age and ethnicity, using odds ratio in the results between CMV seropositive women with CMV shedding and without CMV shedding, with 95% confidence interval.

Time frame: 8 months

Population: The logistic regression of CMV shedding as an outcome (dependent variable; detected or not detected) at a visit with CMV-ELISPOT assay results (independent variable; spot count) as a predictor at the reciprocal visit, adjusted for age and ethnicity, in CMV seropositive women.

ArmMeasureValue (NUMBER)
All Participants Belonged to the Same GroupThe Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-ELISPOT1.00 Odds Ratio
Visit 1 UrineThe Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-ELISPOT0.99 Odds Ratio
Visit 1 Vaginal SecretionsThe Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-ELISPOT1.00 Odds Ratio
Visit 2 SalivaThe Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-ELISPOT0.97 Odds Ratio
Visit 2 UrineThe Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-ELISPOT1.00 Odds Ratio
Visit 2 Vaginal SecretionsThe Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-ELISPOT0.99 Odds Ratio
Secondary

The Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-QuantiFERON

The logistic regression of CMV shedding as an outcome (dependent variable; detected or not detected) at a visit with CMV-QuantiFERON assay results (independent variable; positive or negative) as a predictor at the reciprocal visit, adjusted for age and ethnicity, using odds ratio in the results between CMV seropositive women with CMV shedding and without CMV shedding, with 95% confidence interval.

Time frame: 8 months

Population: The logistic regression of CMV shedding as an outcome (dependent variable; detected or not detected) at a visit with CMV-QuantiFERON assay results (independent variable; positive or negative) as a predictor at the reciprocal visit, adjusted for age and ethnicity, in CMV seropositive women.

ArmMeasureValue (NUMBER)
All Participants Belonged to the Same GroupThe Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-QuantiFERON0.56 Odds Ratio
Visit 1 UrineThe Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-QuantiFERON1.19 Odds Ratio
Visit 1 Vaginal SecretionsThe Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-QuantiFERON2.82 Odds Ratio
Visit 2 SalivaThe Association Between CMV-specific T Cell Immune Response and CMV Shedding in CMV Seropositive Pregnant Women as Measured by CMV-QuantiFERON0.00 Odds Ratio
Secondary

The Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and Postpartum

The association between CMV shedding detection and the specific types of contact with child(ren)'s bodily fluids as assessed in the contact questionnaire at each visit, performed using logistic regression (CMV shedding detection as the outcome variable, the specific types of contact with children's bodily fluids as the predictor varible), adjusted for age, ethnicity, education, and amount of children, with the detection of shedding as a binary outcome, using odds ratio in the results between CMV-seropositive with CMV shedding and without CMV shedding, with 95% confidence intervals.

Time frame: 8 months

Population: The association between CMV shedding detection and the specific types of contact with child(ren)'s bodily fluids as assessed in the contact questionnaire at each visit, performed using adjusted logistic regression.

ArmMeasureGroupValue (NUMBER)
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumClean hands with alcohol gel after wiping child's nose1.50 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands without soap after wiping child's nose1.08 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands without soap after handling with child's urine0.72 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumKiss child on the lips0.87 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands with soap after wiping child's nose1.47 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumClean hands with alcohol gel after handling with child's urine1.25 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumEat with child's used cutlery0.64 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands with soap after handling child's faeces0 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumClean hands with alcohol gel after handling child's faeces1.23 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumDrink from child's used cup0.55 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumEat child's leftover food0.57 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumPut child's dummy in own mouth1.09 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands with soap after handling with child's urine1.23 Adjusted Odds Ratio
All Participants Belonged to the Same GroupThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands without soap after handling child's faeces0.81 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumEat child's leftover food1.16 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands with soap after handling child's faeces0.74 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands without soap after handling child's faeces1.10 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumClean hands with alcohol gel after handling child's faeces0.94 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands with soap after handling with child's urine0.90 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands without soap after handling with child's urine0.84 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumClean hands with alcohol gel after handling with child's urine1.21 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands with soap after wiping child's nose1.58 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands without soap after wiping child's nose0.73 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumClean hands with alcohol gel after wiping child's nose0.93 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumPut child's dummy in own mouth1.00 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumEat with child's used cutlery1.14 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumDrink from child's used cup0.78 Adjusted Odds Ratio
Visit 1 UrineThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumKiss child on the lips1.22 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumEat child's leftover food0.77 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumDrink from child's used cup0.84 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands without soap after handling child's faeces1.22 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands with soap after handling with child's urine0.47 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumEat with child's used cutlery1.01 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands with soap after handling child's faeces0.74 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumPut child's dummy in own mouth1.17 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands without soap after wiping child's nose0.62 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumClean hands with alcohol gel after handling with child's urine1.34 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumClean hands with alcohol gel after handling child's faeces1.49 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands without soap after handling with child's urine1.16 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumKiss child on the lips1.23 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands with soap after wiping child's nose0.54 Adjusted Odds Ratio
Visit 1 Vaginal SecretionsThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumClean hands with alcohol gel after wiping child's nose0.84 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands with soap after wiping child's nose2.19 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands without soap after wiping child's nose1.57 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumDrink from child's used cup0.70 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumClean hands with alcohol gel after wiping child's nose0.31 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumClean hands with alcohol gel after handling child's faeces0.54 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumPut child's dummy in own mouth0 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands without soap after handling child's faeces1.04 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumEat child's leftover food2.14 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumKiss child on the lips1.06 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumEat with child's used cutlery0.67 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands without soap after handling with child's urine1.29 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands with soap after handling child's faeces0.99 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumClean hands with alcohol gel after handling with child's urine0.69 Adjusted Odds Ratio
Visit 2 SalivaThe Association of Contact With Young Children's Bodily Fluids With CMV Shedding in CMV Seropositive Women Throughout Pregnancy and PostpartumWash hands with soap after handling with child's urine0.99 Adjusted Odds Ratio
Secondary

The Association of Demographics With CMV Shedding in CMV Seropositive Women in Pregnancy

The multiple logistic regression of CMV shedding as an outcome (dependent variable; detected or not detected) at any visit during pregnancy with demographic factors (independent variable) as a predictor, adjusted for all demographic variables described, using odds ratio in the results between CMV seropositive women with CMV shedding and without CMV shedding, with 95% confidence interval.

Time frame: 8 months

Population: Multiple logistic regression with CMV shedding in pregnancy status (detected or not detected) as the dependent variable (outcome) and the demographic variables as the independent variables (predictors), on participants where all saliva, urine and vaginal secretion samples were collected and tested at Visit 1, Visit 2 and Visit 3.

ArmMeasureGroupValue (NUMBER)
All Participants Belonged to the Same GroupThe Association of Demographics With CMV Shedding in CMV Seropositive Women in PregnancyWork regularly with children (yes,no)1.60 Odds Ratio
All Participants Belonged to the Same GroupThe Association of Demographics With CMV Shedding in CMV Seropositive Women in PregnancyAge group (<30y,30-39y,>39)3.17 Odds Ratio
All Participants Belonged to the Same GroupThe Association of Demographics With CMV Shedding in CMV Seropositive Women in PregnancyEthnicity (White(W)British,WOther(O),SouthAsian(A),AO,Black,Mixed,O)0.95 Odds Ratio
All Participants Belonged to the Same GroupThe Association of Demographics With CMV Shedding in CMV Seropositive Women in PregnancyBorn in UK (Yes, No)1.02 Odds Ratio
All Participants Belonged to the Same GroupThe Association of Demographics With CMV Shedding in CMV Seropositive Women in PregnancyDuration in UK (<5yrs,5-15yrs,>15yrs)1.41 Odds Ratio
All Participants Belonged to the Same GroupThe Association of Demographics With CMV Shedding in CMV Seropositive Women in PregnancyHighest Education (PhD/Masters, Degree, Diploma, ALevels/GCSE)0.99 Odds Ratio
All Participants Belonged to the Same GroupThe Association of Demographics With CMV Shedding in CMV Seropositive Women in PregnancyTotal pregnancies (2,3,>3)0.36 Odds Ratio
All Participants Belonged to the Same GroupThe Association of Demographics With CMV Shedding in CMV Seropositive Women in PregnancyNo. of children (1,2,>2): OR 2.0 [95% CI 0.3,12.3], p=0.4452.73 Odds Ratio
All Participants Belonged to the Same GroupThe Association of Demographics With CMV Shedding in CMV Seropositive Women in PregnancyNo. of households (<=3,>3)0.91 Odds Ratio
All Participants Belonged to the Same GroupThe Association of Demographics With CMV Shedding in CMV Seropositive Women in PregnancyNo. of people per bedroom (1,2,3)0.73 Odds Ratio
Secondary

The Prevalence of CMV-specific T-cell Immune Responses as Measured by CMV-ELISPOT in CMV Seropositive Women in Pregnancy

The percentage of the number of participants with responsive CMV-ELISPOT results over the total number of participants tested with CMV-ELISPOT at any point in pregnancy

Time frame: 8 months

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
All Participants Belonged to the Same GroupThe Prevalence of CMV-specific T-cell Immune Responses as Measured by CMV-ELISPOT in CMV Seropositive Women in Pregnancy67 Participants
Secondary

The Prevalence of CMV-specific T-cell Immune Responses as Measured by CMV-QuantiFERON in CMV Seropositive Women in Pregnancy

The percentage of the number of participants with positive CMV-QuantiFERON results over the total number of participants tested with CMV-QuantiFERON at any point in pregnancy

Time frame: 8 months

Population: Not all participant recruited in the study were tested with CMV -QuantiFERON assay.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
All Participants Belonged to the Same GroupThe Prevalence of CMV-specific T-cell Immune Responses as Measured by CMV-QuantiFERON in CMV Seropositive Women in Pregnancy62 Participants
Secondary

The Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum

The proportion of detectable CMV virus (measured via polymerase chain reaction) in saliva, urine and vaginal secretions at individual study visits

Time frame: 8 months

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
All Participants Belonged to the Same GroupThe Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum3 Participants
Visit 1 UrineThe Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum9 Participants
Visit 1 Vaginal SecretionsThe Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum9 Participants
Visit 2 SalivaThe Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum3 Participants
Visit 2 UrineThe Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum10 Participants
Visit 2 Vaginal SecretionsThe Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum10 Participants
Visit 3 SalivaThe Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum3 Participants
Visit 3 UrineThe Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum9 Participants
Visit 3 Vaginal SecretionsThe Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum10 Participants
Visit 4 SalivaThe Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum0 Participants
Visit 4 UrineThe Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum7 Participants
Visit 4 Vaginal SecretionsThe Proportion of CMV Shedding in Saliva, Urine and Vaginal Secretions of CMV Seropositive Women Throughout Pregnancy and Postpartum5 Participants
Secondary

The Proportion of CMV-specific T-cell Immune Responses as Measured by CMV-ELISPOT in CMV Seropositive Women Throughout Pregnancy and Postpartum

The percentage of the number of participants with responsive CMV-ELISPOT results (a positive spot count to IE-1 and/or pp65 antigen) over the total number of participants tested for CMV-ELISPOT at each study visit

Time frame: 8 months

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
All Participants Belonged to the Same GroupThe Proportion of CMV-specific T-cell Immune Responses as Measured by CMV-ELISPOT in CMV Seropositive Women Throughout Pregnancy and Postpartum49 Participants
Visit 1 UrineThe Proportion of CMV-specific T-cell Immune Responses as Measured by CMV-ELISPOT in CMV Seropositive Women Throughout Pregnancy and Postpartum24 Participants
Visit 1 Vaginal SecretionsThe Proportion of CMV-specific T-cell Immune Responses as Measured by CMV-ELISPOT in CMV Seropositive Women Throughout Pregnancy and Postpartum25 Participants
Visit 2 SalivaThe Proportion of CMV-specific T-cell Immune Responses as Measured by CMV-ELISPOT in CMV Seropositive Women Throughout Pregnancy and Postpartum8 Participants
Secondary

The Proportion of CMV-specific T-cell Immune Responses as Measured by CMV-QuantiFERON in CMV Seropositive Women Throughout Pregnancy and Postpartum

The percentage of the number of participants with positive CMV-QuantiFERON results over the total number of participants tested for CMV-QuantiFERON at each study visit

Time frame: 8 months

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
All Participants Belonged to the Same GroupThe Proportion of CMV-specific T-cell Immune Responses as Measured by CMV-QuantiFERON in CMV Seropositive Women Throughout Pregnancy and Postpartum50 Participants
Visit 1 UrineThe Proportion of CMV-specific T-cell Immune Responses as Measured by CMV-QuantiFERON in CMV Seropositive Women Throughout Pregnancy and Postpartum39 Participants
Visit 1 Vaginal SecretionsThe Proportion of CMV-specific T-cell Immune Responses as Measured by CMV-QuantiFERON in CMV Seropositive Women Throughout Pregnancy and Postpartum31 Participants
Visit 2 SalivaThe Proportion of CMV-specific T-cell Immune Responses as Measured by CMV-QuantiFERON in CMV Seropositive Women Throughout Pregnancy and Postpartum10 Participants
Secondary

The Proportion of Participating Pregnant Women Completing the Study

Time frame: 8 months

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
All Participants Belonged to the Same GroupThe Proportion of Participating Pregnant Women Completing the Study66 Participants
Visit 1 UrineThe Proportion of Participating Pregnant Women Completing the Study123 Participants
Visit 1 Vaginal SecretionsThe Proportion of Participating Pregnant Women Completing the Study119 Participants
Secondary

The Proportion of Pregnant Women Approached Who Are Recruited Into the Study

The percentage of women approached who are then recruited into the study

Time frame: 8 months

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
All Participants Belonged to the Same GroupThe Proportion of Pregnant Women Approached Who Are Recruited Into the Study966 Participants
Visit 1 UrineThe Proportion of Pregnant Women Approached Who Are Recruited Into the Study804 Participants
Visit 1 Vaginal SecretionsThe Proportion of Pregnant Women Approached Who Are Recruited Into the Study384 Participants
Visit 2 SalivaThe Proportion of Pregnant Women Approached Who Are Recruited Into the Study160 Participants
Secondary

The Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum

The quantity of detectable CMV virus (measured via quantitative polymerase chain reaction in IU/ml) in saliva, urine and vaginal secretions at individual study visits

Time frame: 8 months

Population: As there was no CMV DNA via PCR detected from the participants' saliva samples tested at Visit 4, this arm was excluded from the statistical analysis. Where CMV DNA was detected below the assay's limit of quantification, the quantity was defined as 1.0 IU/ml for the purpose of statistical analysis.

ArmMeasureValue (MEDIAN)
All Participants Belonged to the Same GroupThe Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum521.0 IU/ml
Visit 1 UrineThe Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum1.0 IU/ml
Visit 1 Vaginal SecretionsThe Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum800.0 IU/ml
Visit 2 SalivaThe Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum693.0 IU/ml
Visit 2 UrineThe Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum104.5 IU/ml
Visit 2 Vaginal SecretionsThe Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum189.5 IU/ml
Visit 3 SalivaThe Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum539.0 IU/ml
Visit 3 UrineThe Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum1.0 IU/ml
Visit 3 Vaginal SecretionsThe Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum640.5 IU/ml
Visit 4 SalivaThe Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum1.0 IU/ml
Visit 4 UrineThe Quantity of CMV Shedding in Saliva, Urine and Vaginal Secretions in CMV Seropositive Women Throughout Pregnancy and Postpartum260.0 IU/ml

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026