Table 4.

Sensitivity analysis

Study (first author)	HR (95% CI)	P-value of heterogeneity	I2
Neal et al29	1.76 (1.51–2.06)	<0.00001	49
Li et al20	1.74 (1.50–2.01)	<0.00001	49
Wubetu et al26	1.70 (1.47–1.97)	<0.00001	48
Liu et al21	1.66 (1.43–1.93)	<0.00001	35
Lu et al25	1.70 (1.47–1.97)	<0.00001	48
Fu et al18	1.77 (1.51–2.07)	<0.00001	48
Zhong et al22	1.71 (1.46–2.00)	<0.00001	50
Zhong et al24	1.64 (1.41–1.91)	<0.00001	31
Zeng et al17	1.72 (1.48–2.00)	<0.00001	50
Zhang et al28	1.72 (1.47–2.02)	<0.00001	50
Shi et al27	1.72 (1.48–2.01)	<0.00001	50
Takahashi et al23	1.72 (1.48–2.00)	<0.00001	50
Ning et al19	1.85 (1.58–2.15)	<0.00001	22
Gu et al30	1.72 (1.48–2.00)	<0.00001	50