Genetic polymorphisms of N-acetyltransferase 2 and colorectal cancer risk

Table 2 Distribution frequencies of NAT2 genotype in Hebei Han Chinese population

		Rapid-acetylator genotype					Slow-acetylator genotype
		WT/WT	WT/M1	WT/M2	WT/M3	Sum	M1/M1	M1/M2	M1/M3	M2/M2	M2/M3	M3/M3	Sum
Controls	n	62	9	29	69	169	1	4	9	5	31	18	68
	%	26.2	3.8	12.2	29.1	71.3	0.4	1.7	3.8	2.1	13.1	7.6	28.7
Patients	n	15	1	35	14	65	1	2	4	3	6	2	18
	%	18.1	1.2	42.2	16.9	78.3	1.2	2.4	4.8	3.6	7.2	2.4	21.7
χ2		2.2	0.64	34.4	3.8	1.54	0	0	0.007	0.12	2.06	2.01	1.54
P		0.14	0.42	< 0.0001	0.03	0.22	1	1	0.94	0.73	0.15	0.16	0.22