Association of GSTM1 and GSTT1 Null Genotypes with Toluene Diisocyanate-Induced Asthma

Table 2

Comparison of GSTM1 and GSTT1 genotype frequencies according to the response of the TDI challenge.

Genotype	TDI-PA (%)/TDI-NA (%)	OR (95% CI)	value
GSTM1
Wild	6 (22.2)/13 (50.0)	1.0 (reference)	0.035
Null	21 (77.8)/13 (50.0)	3.50 (1.06–11.49)
GSTT1
Wild	11 (40.7)/15 (57.7)	1.0 (reference)	0.217
Null	16 (59.3)/11 (42.3)	1.98 (0.66–5.91)

TDI-PA: TDI challenge positive asthma and TDI-NA: TDI challenge negative asthma. values were obtained using logistic regression analysis and were considered significant when less than 0.05.