Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Adverse effects
RCT	41 men In review	Partial impotence 3/31 (10%) with finasteride 0/10 (0%) with placebo	Significance not assessed The RCT was small and had low power (3:1 randomisation)
RCT	64 men	Adverse effects 5/33 (15%) with finasteride 7/31 (23%) with placebo	Significance not assessed