Table 1.

GSTM1 and GSTT1 genotypes in atopic asthma patients and controls.

	GSTM1			GSTT1			GSTM1/T1
	Present n (%)	Null n (%)		Present n (%)	Null n (%)		Both present n (%)	One null n (%)	Both null n (%)
Patients	34 (39.5)	52 (60.5)		72 (83.7)	14 (16.3)		27 (31.4)	52 (60.5)	7 (8.1)
Controls	154 (59.7)	104 (40.3)		213 (82.6)	45 (17.4)		130 (50.4)	107 (41.5)	21 (8.1)
OR (CI 95%)	1.0 (ref)	2.3 (1.3-3.3)		1.0 (ref)	0.9 (0.5-1.7)		1.0 (ref)	2.3 (1.4-4.0)	1.6 (0.6-4.1)
p value	0.002			0.870				0.002	0.425

OR: odds ratio; CI: confidence interval.