Comparison 1. Nosocomial S. aureus infections among patients with S. aureus nasal carriage.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Nosocomial S. aureus infection	8	3374	Risk Ratio (M‐H, Fixed, 95% CI)	0.55 [0.43, 0.70]
2 Nosocomial S. aureus infection (High quality studies)	4	2909	Risk Ratio (M‐H, Fixed, 95% CI)	0.69 [0.47, 1.00]