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. 2011 Feb 21;2011:0813.
Ref (type) Population Outcome, Interventions Results and statistical analysis Effect size Favours
Pain

RCT
3-armed trial
180 women, aged 18 to 30 years, with primary dysmenorrhoea Pain scores, assessed by visual analogue scale (VAS; scale 0–10, higher scores indicating more severe pain) 2 months
3 with Iranian herbal medicine (highly purified saffron, celery seed, and anise)
5 with placebo

P <0.001
Effect size not calculated Iranian herbal medicine

RCT
3-armed trial
180 women, aged 18 to 30 years, with primary dysmenorrhoea Pain scores, assessed by VAS (scale 0–10, higher scores indicating more severe pain) 3 months
0.5 with Iranian herbal medicine (highly purified saffron, celery seed, and anise)
6 with placebo

P <0.001
Effect size not calculated Iranian herbal medicine

RCT
3-armed trial
180 women, aged 18 to 30 years, with primary dysmenorrhoea Pain duration 2 months
2.3 with Iranian herbal medicine (highly purified saffron, celery seed, and anise)
16.2 with placebo

P <0.001
Effect size not calculated Iranian herbal medicine

RCT
3-armed trial
180 women, aged 18 to 30 years, with primary dysmenorrhoea Pain duration 3 months
2.4 hours with Iranian herbal medicine (highly purified saffron, celery seed, and anise)
15.4 hours with placebo

P <0.001
Effect size not calculated Iranian herbal medicine