Table 1. Genotype distribution of CYP1A1 and GSTM1 genes among pterygium patients and control group.

Gene	Pterygium group (%) [n=205]	Control group (%) [n=206]	p-value
CYP1A1
m1/m1	68 (33.2)	89 (43.2)
m1/m2	108 (52.7)	103 (50.0)
m2/m2	29 (14.1)	14 (6.8)	0.016
GSTM1
Null	83 (40.5)	84 (40.8)
Present	122 (59.5)	122 (59.2)	1.000