Table 2

Distribution of weekly intake level of ITCs among Chinese female lung cancer patients and controls [n (%)]

Cases (n = 233)Controls (n = 187)OR (95% CI)aOR (95% CI)b
All subjects
 ≤53.0 μmol132 (56.7)78 (41.7)
 >53.0 μmol101 (43.3)109 (58.3)0.56 (0.38–0.83)0.63 (0.41–0.95)
Nonsmokers
 ≤53.0 μmol70 (51.1)72 (42.6)
 >53.0 μmol67 (48.9)97 (57.4)0.70 (0.45–1.11)
Current and ex-smokers
 ≤53.0 μmol62 (64.4)6 (33.3)
 >53.0 μmol34 (35.4)12 (66.7)0.31 (0.10–0.92)0.31 (0.10–0.96)
  • a Adjusted for age (in completed years).

  • b Further adjusted for smoking. Smoking-related regression covariates were smoking at recruitment (yes/no), years of smoking, and number of cigarettes smoked per day.