Comparison 2.

An alternative mouse alone versus a conventional mouse alone

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Incidence of neck/shoulder disorder	2	182	Risk Ratio (M‐H, Random, 95% CI)	0.62 [0.19, 2.00]
2 Incidence of right upper extremity disorder	2	182	Risk Ratio (M‐H, Random, 95% CI)	0.91 [0.48, 1.72]
3 Incidence of upper body disorder (neck, shoulder, and upper extremity)	2	190	Risk Ratio (M‐H, Random, 95% CI)	0.79 [0.52, 1.21]
4 Neck/shoulder discomfort score	2	195	Std. Mean Difference (IV, Random, 95% CI)	0.04 [‐0.26, 0.33]
5 Right upper extremity discomfort score	2	195	Std. Mean Difference (IV, Random, 95% CI)	0.00 [‐0.28, 0.28]