Table 3.

ORs and 95% CIs for RCC among 767 cases and 1,534 controls according to intake quintile of flavonoids (Italy, 1992-2004)

FlavonoidsQuintile of intake, OR (95% CI)
χ2 trend (P)
12345
Isoflavones1*0.86 (0.65-1.14)0.81 (0.61-1.08)0.77 (0.57-1.03)0.76 (0.56-1.03)3.48 (0.062)
Anthocyanidins1*0.96 (0.72-1.28)0.79 (0.58-1.09)1.06 (0.74-1.53)0.94 (0.60-1.47)0.19 (0.665)
Flavan-3-ols1*1.15 (0.87-1.52)1.09 (0.80-1.47)0.91 (0.66-1.26)0.77 (0.56-1.06)4.02 (0.045)
Flavanones1*0.94 (0.71-1.25)0.94 (0.71-1.24)0.71 (0.53-0.96)0.90 (0.67-1.21)1.90 (0.169)
Flavones1*1.05 (0.80-1.39)0.87 (0.65-1.16)0.86 (0.64-1.15)0.68 (0.50-0.93)7.37 (0.007)
Flavonols1*0.89 (0.68-1.19)0.76 (0.57-1.03)0.88 (0.65-1.19)0.69 (0.50-0.95)4.05 (0.044)
Total flavonoids1*1.01 (0.76-1.33)0.89 (0.66-1.19)0.77 (0.56-1.05)0.80 (0.58-1.11)3.55 (0.060)
  • NOTE: Estimates from conditional logistic regression models conditioned on sex, age, and study center and adjusted for period of interview, education, tobacco smoking, alcohol drinking, BMI, occupational physical activity, family history of kidney cancer, and total energy intake.

  • * Reference category.