Table 4.

Sensitivity analysis of crude OR.

Study omitted	Crude OR	95% CI
Burneo et al. (15)	1.38	0.90–2.13
Li et al. (17)	1.22	0.84–1.77
Liao et al. (18)	1.27	0.85–1.90
Brüning et al. (19)	1.49	1.01–2.20
Herdt et al. (20)	1.45	0.96–2.19
Law et al. (21)	1.24	0.83–1.85
Claessens et al. (22)	1.41	0.91–2.18
Matsubara et al. (23)	1.26	0.84–1.88
Hamidou et al. (24)	1.42	0.93–2.16
Passero et al. (26)	1.41	0.90–2.21
Bladin et al. (27)	1.34	0.88–2.03