Table 5

Incidence RR of urothelial cancer for vegetable and fruits consumption, according to cigarette smoking amount and cigarette smoking status categories; NLCS (1986–1992)

Smoking status and amountNo. of casesVegetable and fruit consumption (grams/day in tertiles)
1 (low)23 (high)Pa
Vegetable consumption
 Neverb591.00 (reference)0.72 (0.37–1.39)0.83 (0.43–1.59)0.54
 Ex
  <15 cig/dayc831.00 (reference)1.16 (0.66–2.02)0.90 (0.47–1.70)0.78
  ≥15 cig/dayc1511.00 (reference)0.89 (0.55–1.44)0.92 (0.57–1.48)0.73
 Current
  <15 cig/dayc731.00 (reference)0.58 (0.29–1.16)1.03 (0.53–2.00)1.00
  ≥15 cig/dayc1421.00 (reference)0.97 (0.60–1.57)0.78 (0.47–1.28)0.34
Fruit consumption
 Neverb621.00 (reference)1.08 (0.54–2.14)0.98 (0.51–1.90)0.93
 Ex
  <15 cig/dayc851.00 (reference)0.76 (0.40–1.43)1.57 (0.89–2.77)0.10
  ≥15 cig/dayc1601.00 (reference)0.77 (0.49–1.19)0.68 (0.42–1.11)0.11
 Current
  <15 cig/dayc801.00 (reference)0.75 (0.41–1.35)0.50 (0.23–1.10)0.08
  ≥15 cig/dayc1501.00 (reference)0.82 (0.51–1.33)0.60 (0.35–1.03)0.06
  • a P trend.

  • b Adjusted for age (years) and sex.

  • c Adjusted for age (years), sex, and years of cigarette smoking.