Comparison 5.

Supplementary breaks versus normal breaks

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 After shifts discomfort rating for neck (4‐8 weeks)	2	186	Mean Difference (IV, Fixed, 95% CI)	‐0.25 [‐0.53, 0.02]
2 After shifts discomfort ratings for right shoulder/upper arm (4‐8 weeks)	2	186	Mean Difference (IV, Random, 95% CI)	‐0.24 [‐0.51, 0.03]
3 After shifts discomfort ratings for right forearm/wrist/hand (4‐8 weeks)	2	186	Mean Difference (IV, Random, 95% CI)	‐0.19 [‐0.45, 0.08]