Comparison 3. Etretinate vs placebo.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Proportion of participants cleared or almost cleared in the short term	2	40	Risk Ratio (M‐H, Random, 95% CI)	3.48 [0.82, 14.80]
2 Proportion of participants without relapse in the long term	1	26	Risk Ratio (M‐H, Random, 95% CI)	2.39 [0.92, 6.17]
3 Proportion of participants with adverse effects in the short term	1	20	Risk Ratio (M‐H, Random, 95% CI)	3.5 [0.95, 12.90]