Table 4.

OR of ovarian cancer associated with vitamin supplement, NECSS, Canada, 1994–1997

Vitamin supplementTotal years of vitamin supplement
P for trend
0*
<1
1–5
6–9
≥10
OROR95% CIOR95% CIOR95% CIOR95% CI
Multiple vitamins1.001.090.78–1.541.140.86–1.531.080.69–1.690.910.64–1.270.81
Vitamin A1.001.310.84–2.061.050.66–1.681.060.47–2.420.580.30–1.140.38
β-carotene1.001.140.73–1.761.180.75–1.800.760.25–2.290.310.11–0.910.031
B-complex vitamins1.001.190.74–1.700.850.59–1.211.080.62–1.890.610.36–1.050.14
Vitamin C1.001.360.98–1.871.080.80–1.450.930.57–1.510.800.56–1.160.30
Vitamin E1.001.110.77–1.601.080.74–1.531.150.73–2.070.490.30–0.810.04
Calcium1.001.190.85–1.671.100.82–1.520.930.54–1.590.820.53–1.280.56
Iron1.001.050.58–1.731.180.86–1.631.210.62–2.381.040.60–1.800.53
Zinc1.001.120.69–1.820.980.58–1.650.650.19–2.280.630.28–1.370.29
Selenium1.001.410.76–2.611.240.65–2.690.910.25–3.320.550.18–1.680.73
  • * Reference category.

  • OR adjusted for 10-year age group, province of residence, education, alcohol consumption, cigarette pack-years, BMI, total caloric intake, recreational physical activity, number of live births, menstruation years, and menopause status.