Comparison 2. Any psychosocial intervention vs. control: maternal outcomes.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Positive urine drug test (end of treatment)	3	367	Risk Ratio (M‐H, Random, 95% CI)	1.14 [0.75, 1.73]
2 Positive urine at 1 month+	1	159	Risk Ratio (M‐H, Random, 95% CI)	1.13 [0.55, 2.31]
3 Positive urine at delivery	2	217	Risk Ratio (M‐H, Random, 95% CI)	1.18 [0.52, 2.65]
4 Retention at treatment completion	9	743	Risk Ratio (M‐H, Random, 95% CI)	0.99 [0.93, 1.06]
5 Short term treatment retention	6	514	Risk Ratio (M‐H, Random, 95% CI)	1.00 [0.90, 1.10]
6 Retention in treatment at delivery	1	89	Risk Ratio (M‐H, Random, 95% CI)	0.97 [0.50, 1.88]