Comparison · NCT02266329-sae
Prazosin vs Placebo: serious adverse events
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. Prazosin vs Placebo: serious adverse events. Trial comparisons, record NCT02266329-sae. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT02266329-sae
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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 | 0.0169 | 0.003 | 0.09 | wilson | |
| Risk in group 2 | 0.0333 | 0.00591 | 0.167 | wilson | |
| Risk difference, group 1 minus group 2 | -0.0164 | -0.15 | 0.0616 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 0.508 | 0.0329 | 7.85 | log | |
| Odds ratio, group 1 over group 2 | 0.5 | 0.0302 | 8.28 | log | |
| Number needed to treat, for one fewer participant with a serious adverse event on Prazosin than on Placebo | 61 | from the risk difference interval | the interval includes no difference |
Source ClinicalTrials.gov
Groups2
Group 2 names the comparator: placebo.
| Group | Title | Description | With the outcome | Analysed | ClinicalTrials.gov code |
|---|---|---|---|---|---|
| Group 1 | Prazosin | Subjects will be gradually titrated up to the maximum dose or the maximum tolerated dose based on a dosing algorithm. The maximum dose to be used in this trial is 5mg in the morning and 20 mg at bedtime.~prazosin hydrochloride: Prazosin as oral capsules titrated to the maximum dose or the maximum tolerated dose based on a dosing algorithm. The maximum dose to be used in this trial is 5mg in the morning and 20 mg at bedtime. | 1 | 59 | EG000 |
| Group 2 | Placebo | Subjects will be gradually titrated up to the maximum dose or the maximum tolerated dose based on a dosing algorithm. The maximum dose to be used in this trial is 5mg in the morning and 20 mg at bedtime.~placebo: Oral capsules of placebo identical in appearance to prazosin capsules titrated in the same manner as prazosin. | 1 | 30 | EG001 |
Source ClinicalTrials.gov
Harm
- What it counts
- Total, serious adverse events
- Time frame
- 24 weeks
Source ClinicalTrials.gov
Trial
- Title
- Chronic Postconcussive Headache: A Placebo-Controlled Treatment Trial of Prazosin
- NCT number
- NCT02266329
- Phases
- PHASE1, PHASE2
- Conditions
- Posttraumatic Headache, Combat Disorders, Post Concussion Syndrome, Headache, Mild Traumatic Brain Injury, Posttraumatic Migraine
- Interventions
- prazosin hydrochloride, placebo
- Lead sponsor
- VA Office of Research and Development
- Results first posted
- 2024-06-26
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT02266329?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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