Table 2.

Risk of kidney cancer associated with recreational physical activity, BMI, and energy intake, by histologic subtype, NECSS, Canada, 1994-1997

VariableControls (n)Renal cell
Non–renal cell
Cases (n)Province- and age- adjusted OR (95% CI)Multivariable- adjusted* OR (95% CI)Cases (n)Province- and age- adjusted OR (95% CI)Multivariable- adjusted* OR (95% CI)
BMI (kg/m2)
    18.5 to <251,3991951.001.0039RefRef
    <18.563101.13 (0.57-2.26)1.19 (0.60-2.38)10.54 (0.07-4.03)0.51 (0.07-3.85)
    25 to <301,1783141.94 (1.60-2.37)1.89 (1.55-2.32)571.85 (1.22-2.82)1.85 (1.20-2.84)
    ≥304501572.64 (2.08-3.36)2.57 (2.02-3.28)322.97 (1.82-4.84)2.79 (1.70-4.60)
    Ptrend<0.0001
Total calorie intake (kcals/wk)
    <10,1667741531.001.0030RefRef
    10,166 to <12,7627761671.11 (0.88-1.42)1.10 (0.85-1.41)270.92 (0.54-1.56)0.98 (0.57-1.69)
    12,762 to <15,8957751601.07 (0.84-1.36)1.07 (0.83-1.37)331.13 (0.68-1.88)1.22 (0.72-2.06)
    ≥15,8957741991.37 (1.08-1.73)1.30 (1.02-1.66)401.47 (0.90-2.39)1.53 (0.92-2.53)
    Ptrend0.018
Physical activity (MET-hour/wk)
    <6.37781691.001.0032RefRef
    6.3 to <17.07761700.95 (0.75-1.21)0.98 (0.77-1.26)411.13 (0.70-1.83)1.17 (0.72-1.91)
    17.0 to <34.47761670.91 (0.72-1.16)0.98 (0.77-1.26)280.76 (0.45-1.29)0.84 (0.50-1.44)
    ≥34.47761740.95 (0.75-1.21)1.00 (0.78-1.28)290.76 (0.45-1.28)0.79 (0.46-1.36)
    Ptrend0.62
  • * OR adjusted for age, province, gender, education, smoking pack-years, vegetable intake, and self-reported exposure to pesticides, herbicides, vinyl chloride, benzidine, benzene, mineral or cutting oil, and dyestuffs. Physical activities, BMI, and total calorie intake are adjusted for each other.