Table 2.

Distribution of 767 RCC cases and 1,534 controls according to intake quintile of flavonoids (Italy, 1992-2004)

FlavonoidsMean* (SD)Quintile of intake
12345
Isoflavones (μg)
    Upper cut points25.5 (16.3)14.819.724.832.6
    Cases172157145148145
    Controls306307307307307
Anthocyanidins (mg)
    Upper cut points20.1 (17.8)5.511.619.732.4
    Cases168168137160134
    Controls306308306308306
Flavan-3-ols (mg)
    Upper cut points59.5 (59.4)21.335.854.090.6
    Cases162185161140119
    Controls306307308306307
Flavanones (mg)
    Upper cut points34.7 (30.5)9.622.533.957.8
    Cases168162161123153
    Controls310303308307306
Flavones (mg)
    Upper cut points0.5 (0.3)0.30.40.50.6
    Cases160185147150125
    Controls306307307308306
Flavonols (mg)
    Upper cut points22.4 (13.0)13.317.622.129.9
    Cases178161139162127
    Controls307307306307307
Total flavonoids (mg)
    Upper cut points137.2 (81.6)80.6109.1139.4180.9
    Cases172157145148145
    Controls307306307308306
  • * Mean intake and SD among controls.