Ref (type) | Population | Outcome, Interventions | Results and statistical analysis | Effect size | Favours |
Daily activities | |||||
RCT |
115 women with primary dysmenorrhoea |
Reduction in total dysmenorrhoea score (composite measure of limited ability to work [score 0–3; from none/low efficacy to work to 1 or more day in bed] and need for analgesics [score 0–3; from none to taking analgesia for 3 or more days])
after 4 cycles
–2.6 with low-dose combined oral contraceptive pill (ethinyl estradiol plus norethisterone) –1.4 with placebo |
P <0.001 |
Effect size not calculated | COC |