Table 3 Association between glutathione S transferase genotype profile and the development of primary open angle‐glaucoma.

GSTM1	GSTT1	Patients with glaucoma n (%)	Controls n (%)	OR (95% CI)
Present	Present	59 (40.9%)	53 (43.8%)	1 (Reference)*
Present	Null	54 (37.5%)	14 (11.5%)	3.46 (1.64 to 7.38)
Null	Present	15 (10.5%)	46 (38.0%)	0.29 (0.13 to 0.61)
Null	Null	16 (11.1%)	8 (6.7%)	0.55 (0.20 to 1.52)

GST, glutathione S transferase.

*Reference group; individuals with two putative low‐risk genotypes (the presence of GSTM1 (non‐deleted) and GSTT1 (non‐deleted)).