Comparison · NCT03287830-ea4679a7
Intervention vs Usual Care: Percentage of Participants Who Receive a Second Vaccination by Day 42 From the Initial Influenza Vaccination
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
2 sourcestrial-comparisons-2026-03-23-0.1.0
Cite this record
ConductScience Library. Intervention vs Usual Care: Percentage of Participants Who Receive a Second Vaccination by Day 42 From the Initial Influenza Vaccination. Trial comparisons, record NCT03287830-ea4679a7. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT03287830-ea4679a7
On this page
Measures6
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
| Measure | Value | 95% interval, lower | 95% interval, upper | Method | Note |
|---|---|---|---|---|---|
| Risk in group 1 | 0.624 | 0.594 | 0.652 | wilson | |
| Risk in group 2 | 0.557 | 0.526 | 0.587 | wilson | |
| Risk difference, group 1 minus group 2 | 0.0669 | 0.0247 | 0.109 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 1.12 | 1.04 | 1.2 | log | |
| Odds ratio, group 1 over group 2 | 1.32 | 1.11 | 1.57 | log | |
| Number needed to treat, for one more participant with the outcome on Intervention than on Usual Care | 14.9 | 9.19 | 40.4 | from the risk difference interval |
Source ClinicalTrials.gov
Groups2
Group 2 names the comparator: usual care.
| Group | Title | Description | With the outcome | Analysed | ClinicalTrials.gov code |
|---|---|---|---|---|---|
| Group 1 | Intervention | Text message influenza vaccine reminders~Text message influenza vaccine reminders: Text message reminders for second dose of influenza vaccination | 651 | 1,044 | OG000 |
| Group 2 | Usual Care | Season 2017-18: Usual care has no text message~Season 2018-19: Usual care includes on text message with a link to American Academy of Pediatrics parenting information page. The purpose is to provide those randomized to usual care with tangible benefit that is not related to the study. | 580 | 1,042 | OG001 |
Source ClinicalTrials.gov
Outcome
- Type
- SECONDARY
- Title
- Percentage of Participants Who Receive a Second Vaccination by Day 42 From the Initial Influenza Vaccination
- Description
- Receipt of second dose influenza vaccine by 42 days after first dose
- Time frame
- Up to 42 days after first dose
- Population
Source ClinicalTrials.gov
Trial
- Title
- Flu2Text: Text Message Reminders for 2nd Dose of Influenza Vaccine
- NCT number
- NCT03287830
- Phases
- NA
- Conditions
- Influenza, Vaccination
- Interventions
- Text message influenza vaccine reminders
- Lead sponsor
- Columbia University
- Results first posted
- 2023-03-14
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT03287830?tab=results
Source ClinicalTrials.gov
Source
- Release
- trial-comparisons-2026-03-23-0.1.0
- Release manifest SHA-256
- f66225897fbf258b57ea10bdacfd0347d3cdfda93f7f5685234b7e06ea36fa57
- AACT copy
- 2026-03-23
- Tables read
- outcome_counts.parquet, outcome_measurements.parquet, outcomes.parquet, reported_event_totals.parquet, reported_events.parquet, result_groups.parquet, studies.parquet, ctgov_trial.parquet
Source ClinicalTrials.gov
Sources 2
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions. The measures are ConductScience's calculation from them.
For software
Read this comparison from software.
The record is JSON. No key.
GET https://conductscience.org/api/comparisons/v1/NCT03287830-ea4679a7