Ref (type) | Population | Outcome, Interventions | Results and statistical analysis | Effect size | Favours |
Pain | |||||
Systematic review |
486 women with primary dysmenorrhoea 8 RCTs in this analysis |
Proportion of women with at least moderate pain relief
with aspirin (650 mg four times daily) with placebo Absolute results not reported |
RR 1.60 95% CI 1.12 to 2.29 NNT 10 95% CI 5 to 50 |
Small effect size | aspirin |
Need for additional medication | |||||
Systematic review |
205 women with primary dysmenorrhoea 3 RCTs in this analysis |
Need for additional medication
with aspirin (650 mg four times daily) with placebo Absolute results not reported |
RR 0.79 95% CI 0.58 to 1.08 |
Not significant | |
Systematic review |
36 women Data from 1 RCT |
Need for additional medication
12/24 (50%) with aspirin (650 mg/day during menses) 7/12 (58%) with placebo |
RR 0.86 95% CI 0.46 to 1.60 |
Not significant |