Comparison 4. Sensitivity analyses.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
4.1 Risk of attrition bias	18		Std. Mean Difference (IV, Random, 95% CI)	Subtotals only
4.1.1 High risk	4	278	Std. Mean Difference (IV, Random, 95% CI)	0.06 [‐0.65, 0.78]
4.1.2 Unclear risk	10	789	Std. Mean Difference (IV, Random, 95% CI)	0.01 [‐0.20, 0.22]
4.1.3 Low risk	4	295	Std. Mean Difference (IV, Random, 95% CI)	‐0.19 [‐0.63, 0.24]
4.2 Inclusion criteria	18		Std. Mean Difference (IV, Random, 95% CI)	Subtotals only
4.2.1 Clinician diagnosis	15	1179	Std. Mean Difference (IV, Random, 95% CI)	0.04 [‐0.15, 0.23]
4.2.2 ADHD symptom score	3	183	Std. Mean Difference (IV, Random, 95% CI)	‐0.59 [‐0.90, ‐0.27]