Table 4.

Statistical Analysis of GSTM1 and GSTT1 Genotypes in Oral Squamous Cell Carcinoma Patients

Genotypes		Odd ratio	95% Confidence interval	P value
GSTM1	+		Reference
	-	1.8	0.9-3.9	0.11
GSTT1	+		Reference
	-	1.7	0.7- 4.3	0.28
GSTM1& GSTT1	TM (+), TT (+)		Reference
combination	TM (+), TT (-)	1.8	0.5- 7.2	0.39
	TM (-), TT (+)	1.7	0.7- 4	0.19
	TM (-), TT (-)	2.5	0.7-9.3	0.15