Table 3.

The SULT1A1 Arg213His genotype and bladder cancer risk stratified by smoking behavior.

Studies	Smoking status	Patients			Controls
		Arg/Arg	Arg/His	His/His	Arg/Arg	Arg/His	His/His
Zheng	Smoker	286	282*		186	238*
	Non-smoker	53	47*		71	103*
Hung	Smoker	109	68	7	86	69	6
	Non-smoker	12	4	1	30	19	1
Wang	Smoker	124	23*		88	23*
	Non-smoker	137	16*		152	37*
Cui	Smoker	155	42*		139	37*
	Non-smoker	63	22*		62	19*

^*Combined numbers of Arg/His and His/His genotypes.