Table 5.

GSTT1 null genotype distribution in patients with chronic liver disease and normal individuals.

	Method	Case			Control			Reference
		N	Null	(%)	N	Null	(%)
Filipino	Multiplex PCR	107	26	(24.2)	127	32	(25.2)	Present study
Chinese	PCR	181	108	(59.7)	360	154	(42.7)	[9]
Italian	Multiplex PCR	67	30	(16.0)	400	72	(18.0)	[10]
Spanish	Multiplex PCR	184	53	(28.8)	329	76	(23.1)	[11]
Japanese	Multiplex PCR	78	39	(51.3)	138	66	(47.8)	[19]
Taiwanese	PCR	67	30	(44.8)	128	77	(60.2)	[20]