Comparison 4.

An alternative mouse with an arm support versus a conventional mouse with an arm support

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)	0.76 [0.22, 2.63]
2 Incidence of right upper limb disorder	2	175	Risk Ratio (M‐H, Random, 95% CI)	0.76 [0.37, 1.59]
3 Incidence of upper body disorders (neck, shoulder, and upper limb)	2	190	Risk Ratio (M‐H, Random, 95% CI)	0.77 [0.36, 1.63]
4 Neck/shoulder discomfort score	2	193	Std. Mean Difference (IV, Random, 95% CI)	‐0.39 [‐0.67, ‐0.10]
5 Right upper extremity discomfort score	2	193	Std. Mean Difference (IV, Random, 95% CI)	‐0.27 [‐0.55, 0.02]