Table 6.

Risk of kidney cancer associated with BMI, by total recreational physical activity (MET-hour/wk; tertiles), Canada, 1994-1997

BMI (kg/m2)High physical activity
Medium physical activity
Low physical activity
Pinteraction
CasesControlsOR (95% CI)*CasesControlsOR (95% CI)*CasesControlsOR (95% CI)*
Women
    Renal cell
        <25.0343021.00462851.47 (0.91-2.37)382351.67 (0.99-2.80)0.17
        25.0 to <30.0371322.33 (1.38-3.93)321381.88 (1.10-3.23)361532.36 (1.37-4.06)
        ≥30.022533.56 (1.89-6.71)20632.73 (1.44-5.18)36983.85 (2.21-6.72)
        Ptrend<0.00010.001<0.0001
    Non–renal cell
        <25.063021.00112852.12 (0.76-5.92)62351.44 (0.45-4.62)0.82
        25.0 to <30.051321.96 (0.56-6.86)71382.15 (0.69-6.69)111533.73 (1.30-10.69)
        ≥30.02532.00 (0.37-10.97)5633.68 (1.04-12.98)7983.63 (1.15-11.47)
        Ptrend0.290.0480.006
Men
    Renal cell
        <25.0362311.00202170.56 (0.31-1.02)311921.03 (0.60-1.76)0.91
        25.0 to <30.0782471.77 (1.13-2.77)642571.61 (1.02-2.54)672511.73 (1.09-2.75)
        ≥30.025662.04 (1.11-3.74)22732.00 (1.07-3.73)32972.29 (1.31-4.00)
        Ptrend0.0080.0020.0007
    Non–renal cell
        <25.082311.0052170.63 (0.20-1.98)41920.53 (0.15-1.87)0.91
        25.0 to <30.092470.94 (0.35-2.50)102571.07 (0.41-2.81)152511.52 (0.61-3.82)
        ≥30.05661.98 (0.61-6.46)9733.44 (1.23-9.65)4971.06 (0.29-3.83)
        Ptrend0.360.0360.370
  • * OR adjusted for age, province, education, total energy intake, vegetable intake, smoking pack-years, and self-reported exposure to pesticides, herbicides, vinyl chloride, benzidine, benzene, mineral or cutting oil, and dyestuffs.