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VAX-MOM COVID-19: Increasing Maternal COVID-19 Vaccination

VAX-MOM COVID-19: Increasing Maternal COVID-19 Vaccination

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05570630
Enrollment
6911
Registered
2022-10-06
Start date
2022-10-21
Completion date
2024-07-31
Last updated
2025-09-04

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

Conditions

COVID-19, Immunization; Infection, Pregnancy Related

Keywords

COVID-19, Vaccination, Prenatal Care

Brief summary

COVID-19 infection during pregnancy is associated with increased risk of pre-eclampsia, preterm birth and stillbirth. Pregnant people with COVID-19 have a higher rate of ICU admission and intubation than those who are not pregnant. COVID-19 vaccine is recommended before pregnancy and during pregnancy to decrease these risks. Despite the benefits of COVID-19 vaccination, only 71% of pregnant women were vaccinated for COVID-19 as of June 2022 (most prior to pregnancy), with a much lower rate of 58% among non-Hispanic Black women. An effective intervention is needed to improve COVID vaccination rates for pregnant people overall. In this study, the investigators will perform a randomized controlled trial aimed at practice change in obstetricians' offices, with an overall goal of increasing maternal COVID-19 vaccination rates.

Detailed description

COVID-19 infection during pregnancy is associated with increased risk of pre-eclampsia, preterm birth and stillbirth. Pregnant people with COVID-19 have a higher rate of ICU admission and intubation than those who are not pregnant. COVID-19 vaccine is recommended before pregnancy and during pregnancy to decrease these risks. Despite the benefits of COVID-19 vaccination, only 71% of pregnant women were vaccinated for COVID-19 as of June 2022 (most prior to pregnancy), with a much lower rate of 58% among non-Hispanic Black women. An effective intervention is needed to improve COVID-19 vaccination rates for pregnant people overall. Lack of vaccination stems from a combination of patient (lack of knowledge, vaccine hesitancy), provider (suboptimal communication skills, missed opportunities), and system (e.g. lack of standing orders and patient reminders) factors. An effective intervention is needed to improve COVID-19 vaccination rates for pregnant people. To address this, the investigators plan to use a clustered RCT (randomizing practices), allocating half of the participating practice sites within each health system to the VAX-MOM COVID-19 intervention and the other half to standard of care. The multi-component VAX-MOM COVID-19 intervention will be comprised of: training in communication, provider prompts, standing orders, and feedback on vaccination rates.

Interventions

BEHAVIORALVAX-MOM COVID-19 Intervention

The multi-component VAX-MOM COVID-19 intervention will be comprised of: training in communication, provider prompts, standing orders, and feedback on vaccination rates.

OTHERStandard of Care

Standard vaccine education and processes provided to patients by obstetric practices.

Sponsors

Centers for Disease Control and Prevention
CollaboratorFED
University of California, Los Angeles
CollaboratorOTHER
University of Rochester
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
HEALTH_SERVICES_RESEARCH
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Healthy volunteers
Yes

Inclusion criteria

Patient criteria: * Sex is female * Pregnant * Identified as being eligible for COVID-19 vaccine Practice personnel criteria: \*Provider, nurse or staff currently affiliated with (employed with) the participating OB/GYN sites

Exclusion criteria

\*None

Design outcomes

Primary

MeasureTime frameDescription
Rate of COVID-19 Vaccination (6 Month)6 monthsAverage rate of COVID-19 vaccination will be compared between intervention and control arms, for vaccine eligible patients at participating OB/GYN practice sites. Vaccination status will be obtained from patient electronic health records.

Secondary

MeasureTime frameDescription
Rate of COVID-19 Vaccination (9 Month)9 monthsAverage rate of COVID-19 vaccination will be compared between intervention and control arms, for vaccine eligible patients at participating OB/GYN practice sites. Vaccination status will be obtained from patient electronic health records.

Countries

United States

Participant flow

Participants by arm

ArmCount
VAX-MOM COVID-19 Intervention
VAX-MOM COVID-19 Intervention: The multi-component VAX-MOM COVID-19 intervention will be comprised of: training in communication, provider prompts, standing orders, and feedback on vaccination rates.
4,256
Standard of Care
Standard of Care: Standard vaccine education and processes provided to patients by obstetric practices.
2,655
Total6,911

Baseline characteristics

CharacteristicVAX-MOM COVID-19 InterventionStandard of CareTotal
Age, Categorical
<=18 years
43 Participants39 Participants82 Participants
Age, Categorical
>=65 years
0 Participants0 Participants0 Participants
Age, Categorical
Between 18 and 65 years
1693 Participants1726 Participants3419 Participants
Race/Ethnicity, Customized
Asian
47 Participants69 Participants116 Participants
Race/Ethnicity, Customized
Black
319 Participants367 Participants686 Participants
Race/Ethnicity, Customized
Hispanic
252 Participants265 Participants517 Participants
Race/Ethnicity, Customized
Other/Unknown
187 Participants172 Participants359 Participants
Race/Ethnicity, Customized
White
931 Participants892 Participants1823 Participants
Region of Enrollment
United States
4256 participants2655 participants6911 participants
Sex: Female, Male
Female
4256 Participants2655 Participants6911 Participants
Sex: Female, Male
Male
0 Participants0 Participants0 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 00 / 0
other
Total, other adverse events
0 / 00 / 0
serious
Total, serious adverse events
0 / 00 / 0

Outcome results

Primary

Rate of COVID-19 Vaccination (6 Month)

Average rate of COVID-19 vaccination will be compared between intervention and control arms, for vaccine eligible patients at participating OB/GYN practice sites. Vaccination status will be obtained from patient electronic health records.

Time frame: 6 months

Population: 6 month cohort

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
VAX-MOM COVID-19 InterventionRate of COVID-19 Vaccination (6 Month)251 Participants
Standard of CareRate of COVID-19 Vaccination (6 Month)130 Participants
Secondary

Rate of COVID-19 Vaccination (9 Month)

Average rate of COVID-19 vaccination will be compared between intervention and control arms, for vaccine eligible patients at participating OB/GYN practice sites. Vaccination status will be obtained from patient electronic health records.

Time frame: 9 months

Population: 9 month cohort

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
VAX-MOM COVID-19 InterventionRate of COVID-19 Vaccination (9 Month)404 Participants
Standard of CareRate of COVID-19 Vaccination (9 Month)180 Participants

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