Comparison 2. Virtual reality versus conventional therapy: upper limb function: subgroup analyses.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Dose of intervention	22	1038	Std. Mean Difference (IV, Fixed, 95% CI)	0.07 [‐0.05, 0.20]
1.1 Less than 15 hours of intervention	9	430	Std. Mean Difference (IV, Fixed, 95% CI)	‐0.01 [‐0.20, 0.18]
1.2 More than 15 hours of intervention	13	608	Std. Mean Difference (IV, Fixed, 95% CI)	0.13 [‐0.03, 0.29]
2 Time since onset of stroke	20	930	Std. Mean Difference (IV, Fixed, 95% CI)	0.04 [‐0.09, 0.17]
2.1 Less than 6 months	7	555	Std. Mean Difference (IV, Fixed, 95% CI)	‐0.06 [‐0.23, 0.11]
2.2 More than 6 months	13	375	Std. Mean Difference (IV, Fixed, 95% CI)	0.19 [‐0.02, 0.39]
3 Specialised or gaming	22	1038	Std. Mean Difference (IV, Fixed, 95% CI)	0.07 [‐0.05, 0.20]
3.1 Specialised	15	506	Std. Mean Difference (IV, Fixed, 95% CI)	0.17 [‐0.00, 0.35]
3.2 Gaming	7	532	Std. Mean Difference (IV, Fixed, 95% CI)	‐0.02 [‐0.20, 0.15]
4 Severity of impairment	21	998	Std. Mean Difference (IV, Fixed, 95% CI)	0.07 [‐0.06, 0.19]
4.1 Mild to moderate impairment	13	678	Std. Mean Difference (IV, Fixed, 95% CI)	0.10 [‐0.06, 0.25]
4.2 Moderate to severe impairment	8	320	Std. Mean Difference (IV, Fixed, 95% CI)	0.01 [‐0.22, 0.23]