Table 2

Stratified analyses by genotype and dietary intake of ITC in lung cancer

Dietary intakeaGenotypeCurrent smokersFormer smokers
CaseControlOR (95% CI)bCaseControlOR (95% CI)b
GSTM1
HighPositive28391.053701.0
LowPositive77512.11 (1.15–3.85)69591.59 (0.96–2.64)
HighNull38341.55 (0.79–3.04)59691.14 (0.69–1.90)
LowNull71442.22 (1.20–4.10)46571.14 (0.66–1.96)
GSTT1
HighPositive43541.0801021.0
LowPositive106781.71 (1.04–2.82)84881.29 (0.84–2.00)
HighNull18171.31 (0.60–2.85)29381.06 (0.59–1.89)
LowNull37153.19 (1.54–6.62)31271.79 (0.95–3.37)
Both
HighPositive54631.0961221.0
LowPositive129891.68 (1.07–2.65)1041031.35 (0.91–2.00)
HighNull881.09 (0.38–3.14)15181.08 (0.51–2.30)
LowNull1845.45 (1.72–17.22)13121.71 (0.72–4.08)
  • a Values are in mg/1000 kcal, dichotomized at median value in controls (≤0.39 mg).

  • b Adjusted by age and sex.