Table 2. Genotype distributions of GSTM1/T1 polymorphisms among SCZ and healthy control.

First author, Publication year	Race	Cases			Controls
		Null	Present	Total	Null	Present	Total
GSTM1 polymorphism
Gravina, 2011	Caucasian	82	56	138	70	63	133
Harada, 2001	East Asian	57	30	87	87	89	176
Pae, 2004	East Asian	70	41	111	61	69	130
Raffa, 2013	Caucasian	79	59	138	63	60	123
Watanabe, 2010	East Asian	339	288	627	322	298	620
GSTT1 polymorphism
Gravina, 2011	Caucasian	25	113	138	30	103	133
Raffa, 2013	Caucasian	59	79	138	67	56	123
Saadat, 2007	Caucasian	52	240	292	99	193	292