Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Adverse effects
Systematic review	78 women in analysis for this comparison Data from 1 RCT	Gastrointestinal adverse effects 1/39 (3%) with paracetamol (1000 mg up to 3 times daily) 1/39 (3%) with naproxen (220 mg up to 3 times daily)	OR 1.00 95% CI 0.06 to 16.58		Not significant
Systematic review	78 women in analysis for this comparison Data from 1 RCT	Gastrointestinal adverse effects 2/39 (5%) with paracetamol (1000 mg up to 3 times daily) 3/39 (8%) with naproxen (220 mg up to 3 times daily)	OR 1.54 95% CI 0.24 to 9.78		Not significant