Comparison · NCT00566345-07e0ff93
Influenza Vaccine vs Placebo: Number of Subjects Developing Influenza Infection, as Confirmed by Viral Culture and Typing of Naso-pharyngeal Specimens
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. Influenza Vaccine vs Placebo: Number of Subjects Developing Influenza Infection, as Confirmed by Viral Culture and Typing of Naso-pharyngeal Specimens. Trial comparisons, record NCT00566345-07e0ff93. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT00566345-07e0ff93
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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 | 0.0195 | 0.0141 | 0.027 | wilson | |
| Risk in group 2 | 0.0341 | 0.0267 | 0.0435 | wilson | |
| Risk difference, group 1 minus group 2 | -0.0146 | -0.0254 | -0.00404 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 0.572 | 0.38 | 0.862 | log | |
| Odds ratio, group 1 over group 2 | 0.564 | 0.371 | 0.858 | log | |
| Number needed to treat, for one fewer participant with the outcome on Influenza Vaccine than on Placebo | 68.5 | 39.3 | 248 | from the risk difference interval |
Source ClinicalTrials.gov
Groups2
Group 2 names the comparator: placebo.
| Group | Title | Description | With the outcome | Analysed | ClinicalTrials.gov code |
|---|---|---|---|---|---|
| Group 1 | Influenza Vaccine | Vero-cell derived influenza vaccine~Inactivated seasonal influenza vaccine (split virus, Vero cell-derived): Trivalent, non-adjuvanted vaccine; dose: 0.5 ml | 35 | 1,792 | OG000 |
| Group 2 | Placebo | Phosphate buffered saline (packaged in syringes identical to those used for the investigational vaccine)~Phosphate buffered saline: Packaged in syringes identical to those used for the investigational vaccine; dose: 0.5 ml | 62 | 1,817 | OG001 |
Source ClinicalTrials.gov
Outcome
- Type
- PRIMARY
- Title
- Number of Subjects Developing Influenza Infection, as Confirmed by Viral Culture and Typing of Naso-pharyngeal Specimens
- Description
- Time frame
- 21 days to 180 days after the date of vaccination
- Population
- Intent-to-Treat
Source ClinicalTrials.gov
Trial
- Title
- Efficacy Study of an Investigational Influenza Vaccine (Vero Cell Derived) to Prevent Culture Confirmed Influenza Infection (CCII)
- NCT number
- NCT00566345
- Phases
- PHASE3
- Conditions
- Influenza
- Interventions
- Inactivated seasonal influenza vaccine (split virus, Vero cell-derived), Phosphate buffered saline
- Lead sponsor
- Alachua Government Services, Inc.
- Results first posted
- 2023-10-17
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT00566345?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.
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