Comparison · NCT01973205-b8d408e6
Acetaminophen 250 mg and Aspirin 250 mg vs Placebo: Number of Subjects Who Are Pain Free at the 2-hour Assessment
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
2 sourcestrial-comparisons-2026-03-23-0.1.0
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ConductScience Library. Acetaminophen 250 mg and Aspirin 250 mg vs Placebo: Number of Subjects Who Are Pain Free at the 2-hour Assessment. Trial comparisons, record NCT01973205-b8d408e6. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT01973205-b8d408e6
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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 | 0.221 | 0.183 | 0.263 | wilson | |
| Risk in group 2 | 0.166 | 0.134 | 0.205 | wilson | |
| Risk difference, group 1 minus group 2 | 0.0543 | 0.000311 | 0.108 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 1.33 | 1 | 1.76 | log | |
| Odds ratio, group 1 over group 2 | 1.42 | 1 | 2.01 | log | |
| Number needed to treat, for one more participant with the outcome on Acetaminophen 250 mg and Aspirin 250 mg than on Placebo | 18.4 | 9.25 | 3,210 | 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 | Acetaminophen 250 mg and Aspirin 250 mg | 2 tablets each containing Acetaminophen 250 mg and aspirin 250 mg~Acetaminophen 250 mg and Aspirin 250 mg: 2 tablets each containing Acetaminophen 250 mg and Aspirin 250 mg | 90 | 408 | OG001 |
| Group 2 | Placebo | 2 placebo tablets matching acetaminophen 250 mg and aspirin 250 mg tablets~Placebo: 2 placebo tablets matching acetaminophen 250 mg and aspirin 250 mg tablets | 69 | 415 | OG000 |
Source ClinicalTrials.gov
Outcome
- Type
- PRIMARY
- Title
- Number of Subjects Who Are Pain Free at the 2-hour Assessment
- Description
- Number of subjects who are pain free at the 2-hour assessment
- Time frame
- 2 hours
- Population
- Number of participants analyzed includes only subjects who treated a migraine (AA: N=408, Placebo: N = 415) and had a non-missing pain free status at 2 hours (AA: N=408, Placebo: N = 415).
Source ClinicalTrials.gov
Trial
- Title
- Efficacy and Safety of Acetaminophen and Aspirin Versus Placebo in the Acute Treatment of Migraine
- NCT number
- NCT01973205
- Phases
- PHASE3
- Conditions
- Acute Migraine
- Interventions
- Acetaminophen 250 mg and Aspirin 250 mg, Placebo
- Lead sponsor
- Novartis
- Results first posted
- 2015-06-11
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT01973205?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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