Table 2.

Stratified analyses of p16 methylation and bladder cancer risk

Variable	pa	OR	95% CI	Heterogeneity
				P	I2
p16
Total	10	6.71	3.79-11.87	0.213	25.0%
pTNM	6	0.59	0.22-1.60	0.015	64.6%
Grade	6	1.01	0.52-1.94	0.487	0%
Material
Body fluids	6	8.15	2.36-28.20	0.061	52.6%
Tissues	4	6.49	1.53-27.50	0.686	0%

^aNumber of comparisons.