C. Difficile Vaccine Group vs Placebo Group: serious adverse events
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
Measures 6
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
| Measure | Value | 95% interval, lower | 95% interval, upper | Method | Note | Source |
|---|---|---|---|---|---|---|
| Risk in group 1 | 0.272 | 0.261 | 0.283 | wilson | ClinicalTrials.gov | |
| Risk in group 2 | 0.278 | 0.263 | 0.295 | wilson | ClinicalTrials.gov | |
| Risk difference, group 1 minus group 2 | -0.0065 | -0.026 | 0.0128 | newcombe hybrid score | ClinicalTrials.gov | |
| Risk ratio, group 1 over group 2 | 0.977 | 0.91 | 1.05 | log | ClinicalTrials.gov | |
| Odds ratio, group 1 over group 2 | 0.968 | 0.878 | 1.07 | log | ClinicalTrials.gov | |
| Number needed to treat, for one fewer participant with a serious adverse event on C. Difficile Vaccine Group than on Placebo Group | 154 | from the risk difference interval | the interval includes no difference | ClinicalTrials.gov |
Groups 2
Group 2 names the comparator: placebo.
| Group | Title | Description | With the outcome | Analysed | ClinicalTrials.gov code | Source |
|---|---|---|---|---|---|---|
| Group 1 | C. Difficile Vaccine Group | Participants received 1 injection of 0.5 mL C. difficile toxoid vaccine at Days 0 (Injection 1), 7 (Injection 2), and 30 (Injection 3). | 1,662 | 6,113 | EG000 | ClinicalTrials.gov |
| Group 2 | Placebo Group | Participants received 1 injection of 0.5 mL placebo matched to vaccine at Days 0 (Injection 1), 7 (Injection 2), and 30 (Injection 3). | 851 | 3,057 | EG001 | ClinicalTrials.gov |
Harm 2
| Field | Value | Source |
|---|---|---|
| What it counts | Total, serious adverse events | ClinicalTrials.gov |
| Time frame | Adverse events data was collected throughout the study (up to 3 years). | ClinicalTrials.gov |
Trial 8
| Field | Value | Source |
|---|---|---|
| Title | Study of a Candidate Clostridium Difficile Toxoid Vaccine in Subjects at Risk for C. Difficile Infection | ClinicalTrials.gov |
| NCT number | NCT01887912 | ClinicalTrials.gov |
| Phases | PHASE3 | ClinicalTrials.gov |
| Conditions | Clostridium Difficile Infection | ClinicalTrials.gov |
| Interventions | C. difficile Toxoid Vaccine, Placebo: 0.9% normal saline | ClinicalTrials.gov |
| Lead sponsor | Sanofi Pasteur, a Sanofi Company | ClinicalTrials.gov |
| Results first posted | 2019-07-05 | ClinicalTrials.gov |
| Results on ClinicalTrials.gov | https://clinicaltrials.gov/study/NCT01887912?tab=results | ClinicalTrials.gov |
Source 4
| Field | Value | Source |
|---|---|---|
| Release | trial-comparisons-2026-03-23-0.1.0 | ClinicalTrials.gov |
| Release manifest SHA-256 | f66225897fbf258b57ea10bdacfd0347d3cdfda93f7f5685234b7e06ea36fa57 | ClinicalTrials.gov |
| AACT copy | 2026-03-23 | ClinicalTrials.gov |
| 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 | ClinicalTrials.gov |
Release trial-comparisons-2026-03-23-0.1.0
ClinicalTrials.gov's posted results, through CTTI's AACT: ClinicalTrials.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.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.
ClinicalTrials.gov: none 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.