Table 3.

Population distribution by minor allele carriers and homozygous major allele carriers for GSTP1 and TNF (pooled data).

SNP genotype	No. of children	Current asthma cases [n (%)]	Children in the highest tertile of NO2 (n)	Children with current asthma in the highest tertile of NO2 [n (%)]
GSTP1 rs1138272
TT/TC	789	80 (10.1)	224	15 (6.7)
CC	3,807	287 (7.5)	1,144	57 (5.0)
GSTP1 rs1695
GG/GA	2,740	199 (7.3)	873	34 (3.9)
AA	2,008	170 (8.5)	618	39 (6.3)
TNF rs1800629
AA/AG	1,411	119 (8.4)	421	31 (7.4)
GG	3,072	244 (7.9)	917	40 (4.4)