Table 2.

Subgroup and sensitivity analysis.

Subgroup	All studies
	Pooled risk ratio (95% CI)	Heterogeneity
		I2 value (%)	P
Age
≥65 years	N/A	N/A	N/A
<65 years	0.94 (0.19, 4.55)	0.0	0.990
Sex
Male	N/A	N/A	N/A
Female	0.94 (0.19, 4.55)	0.0	0.990
Types of valvular
AVR	1.03 (0.07, 15.79)	N/A	N/A
MVR	0.89 (0.13, 6.21)	0.0	0.908

AVR = aortic valve replacement, CI = confidence interval, MVR = mitral valve replacement, N/A = not available.