Asthma
Conditions
Brief summary
The purpose of this study is to establish the safety and tolerability of Unbiased Biomarkers for the Prediction of Respiratory Disease Outcomes (U-BIOPRED) human rhinovirus 16 (RV16UB) in healthy and asthmatic participants, and to identify an appropriate dosage of RV16UB in order to study biomarkers in asthmatic participants. The study is divided into 2 parts. Part 1 is a dose-finding study where healthy participants, and asthmatic participants, who were either treated or not treated with a class of long-acting beta antagonists (LABA) will be recruited to undergo nasal challenge with increasing doses of RV16UB. Part 2 is a biomarker study where mild to moderate asthmatics undergo challenge with the most appropriate dose of RV16UB identified in Part 1, based on tolerability and viral effects. .
Interventions
BIOLOGICALRV16UB
RV16UB is administered by spraying an atomized viral suspension into a single nostril. Planned doses of RV16UB in Part 1 are 10 Tissue Culture Infective Dose 50 (TCID50), 100 TCID50, 1000 TCID50 and 10,000 TCID50.
DRUGLABA
Asthmatic participants were treated with LABA as part of their standard of care
Sponsors
U-BIOPRED Consortium
Merck Sharp & Dohme LLC
Study design
Allocation
NON_RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 55 Years
Healthy volunteers
Yes
Inclusion criteria
Parts 1 and 2: * have a Body Mass Index (BMI) between =\< 35 kg/m\^2 and \> 17 kg/m\^2 * female of childbearing potential is not pregnant and agrees to use 2 acceptable methods of birth control until 10 days after the last visit,; or female is of non-childbearing potential * is a non-smoker, or has not smoked within prior 12 months, with a history of =\< 10 pack-years Part 1: Either of the following: * healthy (may have out-of season seasonal allergies) * mild to moderate-asthmatic with a history of spontaneous or exertional wheezing; and with all of the following for \> 4 weeks prior: daytime symptoms twice weekly or less, no activity limitation, no nocturnal symptoms, uses reliever treatment twice daily or less, with an unchanged asthma medication dose, and uses inhaled corticosteroid (ICS) at a stable dose-equivalent of =\< 500 mcg/day fluticasone propionate Part 2: * mild to moderate-asthmatics only with a history of spontaneous or exertional wheezing; and with all of the following for \> 4 weeks prior: daytime symptoms twice weekly or less, no activity limitation, no nocturnal symptoms, uses reliever treatment twice daily or less, with an unchanged asthma medication dose, and uses ICS at a stable dose-equivalent of =\< 500 mcg/day fluticasone propionate * had a mild change in symptoms associated with viral syndrome, leading to temporarily increased short acting beta agonist use or increased ICS dose within the past 5 years
Exclusion criteria
* has a history of severe or difficult to manage allergies (e.g. food, drug, latex) * has a history of asthma-related ventilatory failure in adolescence or adulthood * is positive for hepatitis B surface antigen, hepatitis C antibodies or human immunodeficiency virus (HIV) * has significant nasal septum deviation, nasal polyps or other nasal anatomical abnormality * shares the same household or has intimate contact with an infant, pregnant or lactating woman, or immunosuppressed individual * has a history or current evidence of any upper or lower respiratory tract infection within 6 weeks prior to baseline assessment * had major surgery or lost 1 unit (500 mL) of blood within prior 4 weeks * has participated in another investigational trial within the prior 10 weeks * is pregnant or a nursing mother * uses excluded prescription or non-prescription medications within 2 weeks prior to initial viral challenge and throughout the trial
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Number of Asthmatic Participants Demonstrating at Least 10^3 Copies/ml of Viral RNA in Nasal Lavage Fluid on Days 1 to 14 (Part 1) | Days 1 - 14 | Viral RNA was measured by real time reverse transcriptase polymerase chain reaction (qRT-PCR) from nasal lavage fluid collected on day 3 and day 7 from asthmatic participants, and the number of participants with at least 10\^3 copies/ml was determined. |
| TWA Percent CFB in Evening FEV1 in Asthmatic Participants on Days 1-7 (Part 2) | Baseline and Days 1- 7 | Log-transformed FEV1 data were fit by Bayesian hierarchical longitudinal models, with a random participant effect and a fixed categorical effect for day. All baseline (day -7 to day -1) FEV1 were assumed to be with equal mean. FEV1 assessments obtained between 3 pm to next day 3 am were counted as evening measurements. The TWA CFB evening FEV1 on days 1-7 was calculated as the difference of the mean of estimated day 1-7 evening FEV1 value and the corresponding estimated baseline value. The FEV1 readings on the evenings of sputum inductions were excluded from the analyses. The 95% Confidence Interval actually refers to a 95% Credible Interval. The anticipated mean reduction from baseline is 10%. |
| Change From Baseline in Mean Maximum Jackson Cold Symptom Score (CSS) on Days 1 to 14 in Asthmatic Participants (Part 1) | Baseline and Days 1 - 14 | Asthmatic participants from Part 1 were treated with RV16UB virus, and challenge induced upper airway symptoms were monitored with a diary recording CSS. The CSS measures 8 cold symptoms, with each symptom scored from 0 (absent) to 3 (severe). The total score ranges from 0-24, with higher scores reflecting greater severity, and a positive change from baseline indicating worsening symptoms. |
| Number of Healthy and Asthmatic Participants With Events of Clinical Interest (ECI) (Part 1) | Up to Day 24 | ECI are selected non-serious and serious adverse events which include the following: an overdose of Sponsor's product; requirement for systemic steroids to treat asthma exacerbation related to virus challenge; acute reaction to virus challenge, confirmed through repeat measurement and when considered potentially associated with administration of virus; specified vital sign findings within 4hr of challenge; specified symptom findings within 24hr of challenge; \>20% decrease in Forced Expiratory Volume in 1 second (FEV1) relative to baseline within 4hr of challenge; dyspnea associated with drop in FEV1 (within 4hr of challenge) that is unresponsive to a bronchodilator rescue agent within 20 minutes; Grade 2+ deviation from normal values of liver-related laboratory parameters at any time between challenge and day 14. |
| Number of Participants With Serious Adverse Events (SAE) (Parts 1 and 2) | Up to Day 24 | A SAE is any adverse event occurring at any dose or during any use of the Sponsor's product that: results in death; is life threatening; results in persistent or significant disability/incapacity; results in or prolongs an existing in-patient hospitalization; is a congenital anomaly/birth defect; is a cancer; is associated with an overdose; is another important medical event. |
| Number of Asthmatic Participants Treated With a Viral Dose of 100 TCID50 With Challenge Induced Upper Airway Symptoms (Part 1) | Day 1 up to Day 7 | Asthmatic participants from Part 1 were treated with RV16UB virus at a dose of 100 TCID50, and challenge induced upper airway symptoms were monitored with a diary recording Jackson Cold Symptom Score (CSS). The CSS measures 8 cold symptoms, with each symptom scored from 0 (absent) to 3 (severe). The total score ranges from 0-24, with higher scores reflecting greater severity. The number of participants with a CSS score equal or greater than 3 for two days in a row are presented. |
| Time -Weighted Average (TWA) Percent Change From Baseline (CFB) in Morning FEV1 in Asthmatic Participants on Days 1-7 (Part 2) | Baseline and Days 1 - 7 | Log-transformed FEV1 data were fit by Bayesian hierarchical longitudinal models, with a random participant effect and a fixed categorical effect for day. All baseline (day -7 to day -1) FEV1 were assumed to be with equal mean. FEV1 assessments obtained between 3 am to 3 pm were counted as morning measurements. The TWA CFB morning FEV1 on days 1-7 was calculated as the difference of the mean of estimated day 1-7 morning FEV1 value and the corresponding estimated baseline value. The 95% Confidence Interval actually refers to a 95% Credible Interval. The anticipated mean reduction from baseline is 10%. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Mean Change From Baseline in TWA Asthma Control Diary (ACD) Score of Asthmatic Participants on Days 3 to 10 (Part 2) | Baseline and Days 3 to 10 | The ACD contains seven symptom questions (nocturnal awakening, waking in the morning with symptoms, activity limitation, shortness of breath and wheezing) which are answered on rising in the morning and retiring at bedtime. Missing scores are imputed by linear interpolation or extrapolation. Daily ACD score was fit by a Bayesian hierarchical longitudinal model with participant-specific intercept and a fixed categorical effect for day. All baseline (day -7 to day -1) ACD scores are assumed to be with equal mean. The ACD score is the sum of responses to the seven questions, with answers on a 7-point scale (0= no impairment; 6 = maximum impairment) with the score ranging from 0 to 42, and higher scores indicating greater impairment. The 95% Confidence Interval actually refers to a 95% Credible Interval. The mean percent increase is anticipated to be different from zero. |
| Mean Percent Change From Baseline in Maximum Drop FEV1 of Asthmatic Participants (Part 2) | Baseline and up to day 7 | Log-transformed FEV1 data were fit by Bayesian hierarchical longitudinal models, with a random participant effect and a fixed categorical effect for day. All baseline (day -7 to day -1) FEV1 were assumed to be with equal mean. The FEV1 readings on the evenings of sputum inductions were excluded from the analyses. The percent decrease of the lowest FEV1 measurement after viral challenge compared to the TWA of the baseline FEV1 is presented. The 95% Confidence Interval actually refers to a 95% Credible Interval. The mean percent decrease is anticipated to be different from zero. |
Participant flow
Recruitment details
Male and female healthy participants, and participants with mild-moderate asthma between the ages of 18 and 55 years (inclusive) were enrolled in this trial.
Participants by arm
| Arm | Count |
|---|---|
| Healthy 10 TCID50 (Part 1) Healthy participants were treated with 10 Tissue Culture Infective Dose 50 (TCID50) administered by spraying an atomized viral suspension of RV16UB into a single nostril. | 6 |
| Healthy 100 TCID50 (Part 1) Healthy participants were treated with 100 TCID50 administered by spraying an atomized viral suspension of RV16UB into a single nostril. | 6 |
| Healthy 1000 TCID50 (Part 1) Healthy participants were treated with 1000 TCID50 administered by spraying an atomized viral suspension of RV16UB into a single nostril. | 6 |
| Asthmatic Non-LABA 10 TCID50 (Part 1) Participants with mild to moderate asthma, not concomitantly treated with LABA, were treated with 10 TCID50 administered by spraying an atomized viral suspension of RV16UB into a single nostril. | 6 |
| Asthmatic Non-LABA 100 TCID50 (Part 1) Participants with mild to moderate asthma, not concomitantly treated with LABA, were treated with 100 TCID50 administered by spraying an atomized viral suspension of RV16UB into a single nostril. | 6 |
| Asthmatic LABA 100 TCID50 (Part 1) Participants with mild to moderate asthma, concomitantly treated with LABA, were treated with 100 TCID50 administered by spraying an atomized viral suspension of RV16UB into a single nostril. | 6 |
| Asthmatic Non-LABA 100 TCID50 (Part 2) Participants with mild to moderate asthma, not concomitantly treated with LABA, were treated with 100 TCID50 administered by spraying an atomized viral suspension of RV16UB into a single nostril. | 23 |
| Total | 59 |
Baseline characteristics
| Characteristic | Healthy 10 TCID50 (Part 1) | Healthy 100 TCID50 (Part 1) | Healthy 1000 TCID50 (Part 1) | Asthmatic Non-LABA 10 TCID50 (Part 1) | Asthmatic Non-LABA 100 TCID50 (Part 1) | Asthmatic LABA 100 TCID50 (Part 1) | Asthmatic Non-LABA 100 TCID50 (Part 2) | Total |
|---|---|---|---|---|---|---|---|---|
| Age, Continuous | 31.5 Years STANDARD_DEVIATION 9.6 | 39.7 Years STANDARD_DEVIATION 11.4 | 31.7 Years STANDARD_DEVIATION 10.1 | 31.7 Years STANDARD_DEVIATION 8.9 | 32.0 Years STANDARD_DEVIATION 10.2 | 31.7 Years STANDARD_DEVIATION 9.5 | 28.9 Years STANDARD_DEVIATION 9.3 | 31.4 Years STANDARD_DEVIATION 9.7 |
| Sex: Female, Male Female | 2 Participants | 4 Participants | 5 Participants | 1 Participants | 5 Participants | 5 Participants | 13 Participants | 35 Participants |
| Sex: Female, Male Male | 4 Participants | 2 Participants | 1 Participants | 5 Participants | 1 Participants | 1 Participants | 10 Participants | 24 Participants |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk | EG002 affected / at risk | EG003 affected / at risk | EG004 affected / at risk | EG005 affected / at risk | EG006 affected / at risk |
|---|---|---|---|---|---|---|---|
| deaths Total, all-cause mortality | — / — | — / — | — / — | — / — | — / — | — / — | — / — |
| other Total, other adverse events | 2 / 6 | 3 / 6 | 4 / 6 | 0 / 6 | 2 / 6 | 5 / 6 | 8 / 23 |
| serious Total, serious adverse events | 0 / 6 | 0 / 6 | 0 / 6 | 0 / 6 | 0 / 6 | 1 / 6 | 0 / 23 |
Outcome results
Primary
Change From Baseline in Mean Maximum Jackson Cold Symptom Score (CSS) on Days 1 to 14 in Asthmatic Participants (Part 1)
Asthmatic participants from Part 1 were treated with RV16UB virus, and challenge induced upper airway symptoms were monitored with a diary recording CSS. The CSS measures 8 cold symptoms, with each symptom scored from 0 (absent) to 3 (severe). The total score ranges from 0-24, with higher scores reflecting greater severity, and a positive change from baseline indicating worsening symptoms.
Time frame: Baseline and Days 1 - 14
Population: Participants who complied with the protocol sufficiently to ensure that the data were likely to exhibit the effects of viral challenge, according to the underlying scientific model. Healthy participants, and participants from Part 2 were not analyzed.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Asthmatic Non-LABA 10 TCID50 (Part 1) | Change From Baseline in Mean Maximum Jackson Cold Symptom Score (CSS) on Days 1 to 14 in Asthmatic Participants (Part 1) | 6.05 Score on a scale | Standard Deviation 3.18 |
| Asthmatic Non-LABA 100 TCID50 (Part 1) | Change From Baseline in Mean Maximum Jackson Cold Symptom Score (CSS) on Days 1 to 14 in Asthmatic Participants (Part 1) | 6.99 Score on a scale | Standard Deviation 3.22 |
| Asthmatic LABA 100 TCID50 (Part 1) | Change From Baseline in Mean Maximum Jackson Cold Symptom Score (CSS) on Days 1 to 14 in Asthmatic Participants (Part 1) | 9.56 Score on a scale | Standard Deviation 4.76 |
Primary
Number of Asthmatic Participants Demonstrating at Least 10^3 Copies/ml of Viral RNA in Nasal Lavage Fluid on Days 1 to 14 (Part 1)
Viral RNA was measured by real time reverse transcriptase polymerase chain reaction (qRT-PCR) from nasal lavage fluid collected on day 3 and day 7 from asthmatic participants, and the number of participants with at least 10\^3 copies/ml was determined.
Time frame: Days 1 - 14
Population: Participants who complied with the protocol sufficiently to ensure that the data were likely to exhibit the effects of viral challenge, according to the underlying scientific model. Healthy participants, and participants from Part 2 were not analyzed.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Asthmatic Non-LABA 10 TCID50 (Part 1) | Number of Asthmatic Participants Demonstrating at Least 10^3 Copies/ml of Viral RNA in Nasal Lavage Fluid on Days 1 to 14 (Part 1) | 4 Participants |
| Asthmatic Non-LABA 100 TCID50 (Part 1) | Number of Asthmatic Participants Demonstrating at Least 10^3 Copies/ml of Viral RNA in Nasal Lavage Fluid on Days 1 to 14 (Part 1) | 5 Participants |
| Asthmatic LABA 100 TCID50 (Part 1) | Number of Asthmatic Participants Demonstrating at Least 10^3 Copies/ml of Viral RNA in Nasal Lavage Fluid on Days 1 to 14 (Part 1) | 6 Participants |
Primary
Number of Asthmatic Participants Treated With a Viral Dose of 100 TCID50 With Challenge Induced Upper Airway Symptoms (Part 1)
Asthmatic participants from Part 1 were treated with RV16UB virus at a dose of 100 TCID50, and challenge induced upper airway symptoms were monitored with a diary recording Jackson Cold Symptom Score (CSS). The CSS measures 8 cold symptoms, with each symptom scored from 0 (absent) to 3 (severe). The total score ranges from 0-24, with higher scores reflecting greater severity. The number of participants with a CSS score equal or greater than 3 for two days in a row are presented.
Time frame: Day 1 up to Day 7
Population: Participants who complied with the protocol sufficiently to ensure that the data were likely to exhibit the effects of viral challenge, according to the underlying scientific model. Healthy participants, asthmatics treated with a viral dose of 10 TCID 50, and participants from Part 2 were not analyzed.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Asthmatic Non-LABA 100 TCID50 (Part 1) | Number of Asthmatic Participants Treated With a Viral Dose of 100 TCID50 With Challenge Induced Upper Airway Symptoms (Part 1) | 6 Participants |
| Asthmatic LABA 100 TCID50 (Part 1) | Number of Asthmatic Participants Treated With a Viral Dose of 100 TCID50 With Challenge Induced Upper Airway Symptoms (Part 1) | 5 Participants |
Primary
Number of Healthy and Asthmatic Participants With Events of Clinical Interest (ECI) (Part 1)
ECI are selected non-serious and serious adverse events which include the following: an overdose of Sponsor's product; requirement for systemic steroids to treat asthma exacerbation related to virus challenge; acute reaction to virus challenge, confirmed through repeat measurement and when considered potentially associated with administration of virus; specified vital sign findings within 4hr of challenge; specified symptom findings within 24hr of challenge; \>20% decrease in Forced Expiratory Volume in 1 second (FEV1) relative to baseline within 4hr of challenge; dyspnea associated with drop in FEV1 (within 4hr of challenge) that is unresponsive to a bronchodilator rescue agent within 20 minutes; Grade 2+ deviation from normal values of liver-related laboratory parameters at any time between challenge and day 14.
Time frame: Up to Day 24
Population: Participants who complied with the protocol sufficiently to ensure that the data were likely to exhibit the effects of viral challenge, according to the underlying scientific model. Participants from Part 2 were not analyzed.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Healthy 10 TCID50 (Part 1) | Number of Healthy and Asthmatic Participants With Events of Clinical Interest (ECI) (Part 1) | 1 Participants |
| Healthy 100 TCID50 (Part 1) | Number of Healthy and Asthmatic Participants With Events of Clinical Interest (ECI) (Part 1) | 0 Participants |
| Healthy 1000 TCID50 (Part 1) | Number of Healthy and Asthmatic Participants With Events of Clinical Interest (ECI) (Part 1) | 0 Participants |
| Asthmatic Non-LABA 10 TCID50 (Part 1) | Number of Healthy and Asthmatic Participants With Events of Clinical Interest (ECI) (Part 1) | 0 Participants |
| Asthmatic Non-LABA 100 TCID50 (Part 1) | Number of Healthy and Asthmatic Participants With Events of Clinical Interest (ECI) (Part 1) | 0 Participants |
| Asthmatic LABA 100 TCID50 (Part 1) | Number of Healthy and Asthmatic Participants With Events of Clinical Interest (ECI) (Part 1) | 0 Participants |
Primary
Number of Participants With Serious Adverse Events (SAE) (Parts 1 and 2)
A SAE is any adverse event occurring at any dose or during any use of the Sponsor's product that: results in death; is life threatening; results in persistent or significant disability/incapacity; results in or prolongs an existing in-patient hospitalization; is a congenital anomaly/birth defect; is a cancer; is associated with an overdose; is another important medical event.
Time frame: Up to Day 24
Population: Participants who complied with the protocol sufficiently to ensure that the data were likely to exhibit the effects of viral challenge, according to the underlying scientific model.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Healthy 10 TCID50 (Part 1) | Number of Participants With Serious Adverse Events (SAE) (Parts 1 and 2) | 0 Participants |
| Healthy 100 TCID50 (Part 1) | Number of Participants With Serious Adverse Events (SAE) (Parts 1 and 2) | 0 Participants |
| Healthy 1000 TCID50 (Part 1) | Number of Participants With Serious Adverse Events (SAE) (Parts 1 and 2) | 0 Participants |
| Asthmatic Non-LABA 10 TCID50 (Part 1) | Number of Participants With Serious Adverse Events (SAE) (Parts 1 and 2) | 0 Participants |
| Asthmatic Non-LABA 100 TCID50 (Part 1) | Number of Participants With Serious Adverse Events (SAE) (Parts 1 and 2) | 0 Participants |
| Asthmatic LABA 100 TCID50 (Part 1) | Number of Participants With Serious Adverse Events (SAE) (Parts 1 and 2) | 1 Participants |
| Asthmatic Non-LABA 100 TCID50 (Part 2) | Number of Participants With Serious Adverse Events (SAE) (Parts 1 and 2) | 0 Participants |
Primary
Time -Weighted Average (TWA) Percent Change From Baseline (CFB) in Morning FEV1 in Asthmatic Participants on Days 1-7 (Part 2)
Log-transformed FEV1 data were fit by Bayesian hierarchical longitudinal models, with a random participant effect and a fixed categorical effect for day. All baseline (day -7 to day -1) FEV1 were assumed to be with equal mean. FEV1 assessments obtained between 3 am to 3 pm were counted as morning measurements. The TWA CFB morning FEV1 on days 1-7 was calculated as the difference of the mean of estimated day 1-7 morning FEV1 value and the corresponding estimated baseline value. The 95% Confidence Interval actually refers to a 95% Credible Interval. The anticipated mean reduction from baseline is 10%.
Time frame: Baseline and Days 1 - 7
Population: Participants who complied with the protocol sufficiently to ensure that the data were likely to exhibit the effects of viral challenge, according to the underlying scientific model. Participants from Part 1 were not analyzed; one participant who received a viral dose of 67 TCID50, was included in the analysis.
| Arm | Measure | Value (MEAN) |
|---|---|---|
| Asthmatic Non-LABA 100 TCID50 (Part 2) | Time -Weighted Average (TWA) Percent Change From Baseline (CFB) in Morning FEV1 in Asthmatic Participants on Days 1-7 (Part 2) | -1.840 Percent change |
Primary
TWA Percent CFB in Evening FEV1 in Asthmatic Participants on Days 1-7 (Part 2)
Log-transformed FEV1 data were fit by Bayesian hierarchical longitudinal models, with a random participant effect and a fixed categorical effect for day. All baseline (day -7 to day -1) FEV1 were assumed to be with equal mean. FEV1 assessments obtained between 3 pm to next day 3 am were counted as evening measurements. The TWA CFB evening FEV1 on days 1-7 was calculated as the difference of the mean of estimated day 1-7 evening FEV1 value and the corresponding estimated baseline value. The FEV1 readings on the evenings of sputum inductions were excluded from the analyses. The 95% Confidence Interval actually refers to a 95% Credible Interval. The anticipated mean reduction from baseline is 10%.
Time frame: Baseline and Days 1- 7
Population: Participants who complied with the protocol sufficiently to ensure that the data were likely to exhibit the effects of viral challenge, according to the underlying scientific model. Participants from Part 1 were not analyzed; one participant who received a viral dose of 67 TCID 50, was included in the analysis.
| Arm | Measure | Value (MEAN) |
|---|---|---|
| Asthmatic Non-LABA 100 TCID50 (Part 2) | TWA Percent CFB in Evening FEV1 in Asthmatic Participants on Days 1-7 (Part 2) | -2.134 Percent change |
Secondary
Mean Change From Baseline in TWA Asthma Control Diary (ACD) Score of Asthmatic Participants on Days 3 to 10 (Part 2)
The ACD contains seven symptom questions (nocturnal awakening, waking in the morning with symptoms, activity limitation, shortness of breath and wheezing) which are answered on rising in the morning and retiring at bedtime. Missing scores are imputed by linear interpolation or extrapolation. Daily ACD score was fit by a Bayesian hierarchical longitudinal model with participant-specific intercept and a fixed categorical effect for day. All baseline (day -7 to day -1) ACD scores are assumed to be with equal mean. The ACD score is the sum of responses to the seven questions, with answers on a 7-point scale (0= no impairment; 6 = maximum impairment) with the score ranging from 0 to 42, and higher scores indicating greater impairment. The 95% Confidence Interval actually refers to a 95% Credible Interval. The mean percent increase is anticipated to be different from zero.
Time frame: Baseline and Days 3 to 10
Population: Participants who complied with the protocol sufficiently to ensure that the data were likely to exhibit the effects of viral challenge, according to the underlying scientific model. Participants from Part 1 were not analyzed; one participant who received a viral dose of 67 TCID 50, was included in the analysis.
| Arm | Measure | Value (MEAN) |
|---|---|---|
| Asthmatic Non-LABA 100 TCID50 (Part 2) | Mean Change From Baseline in TWA Asthma Control Diary (ACD) Score of Asthmatic Participants on Days 3 to 10 (Part 2) | 2.732 Score on a scale |
Secondary
Mean Percent Change From Baseline in Maximum Drop FEV1 of Asthmatic Participants (Part 2)
Log-transformed FEV1 data were fit by Bayesian hierarchical longitudinal models, with a random participant effect and a fixed categorical effect for day. All baseline (day -7 to day -1) FEV1 were assumed to be with equal mean. The FEV1 readings on the evenings of sputum inductions were excluded from the analyses. The percent decrease of the lowest FEV1 measurement after viral challenge compared to the TWA of the baseline FEV1 is presented. The 95% Confidence Interval actually refers to a 95% Credible Interval. The mean percent decrease is anticipated to be different from zero.
Time frame: Baseline and up to day 7
Population: Participants who complied with the protocol sufficiently to ensure that the data were likely to exhibit the effects of viral challenge, according to the underlying scientific model. Participants from Part 1 were not analyzed; one participant who received a viral dose of 67 TCID 50, was included in the analysis.
| Arm | Measure | Value (MEAN) |
|---|---|---|
| Asthmatic Non-LABA 100 TCID50 (Part 2) | Mean Percent Change From Baseline in Maximum Drop FEV1 of Asthmatic Participants (Part 2) | -6.838 Percent change |