Table 2 Average intakes of antioxidants by case-control status, NECSS, Canada, 1994-1997
From: Antioxidants and breast cancer risk- a population-based case-control study in Canada
| Â | Premenopausal | Postmenopausal | ||||
|---|---|---|---|---|---|---|
Characteristic | Cases (N = 866) | Controls (N = 845) | p | Cases(1496) | Controls (n = 1617) | P |
| Â | Mean | Mean | Â | Mean | Mean | Â |
From diet | Â | Â | Â | Â | Â | Â |
   Beta-carotene (μg/wk) | 31643.6 | 32369.8 | 0.55 | 37831 | 37648.6 | 0.89 |
   Vitamin E (mg/wk) | 56.4 | 56.8 | 0.82 | 64.2 | 62.6 | 0.37 |
   Vitamin C (mg/wk) | 1101.2 | 1137.1 | 0.38 | 1184.8 | 1151.3 | 0.26 |
   Selenium (μg/wk) | 660.2 | 651.6 | 0.54 | 662.9 | 656.9 | 0.65 |
   Zinc (mg/wk) | 65.7 | 64.9 | 0.52 | 67.1 | 65.7 | 0.27 |
From supplement (years) | Â | Â | Â | Â | Â | Â |
   Vitamin A | 0.88 | 1.02 | 0.38 | 1.02 | 1.06 | 0.76 |
   Beta-carotene | 0.59 | 0.77 | 0.16 | 0.68 | 0.76 | 0.39 |
   Vitamin C | 3.22 | 3.53 | 0.24 | 3.85 | 3.68 | 0.44 |
   Vitamin E | 1.53 | 1.80 | 0.16 | 2.61 | 2.72 | 0.56 |
   Zinc | 0.60 | 0.83 | 0.09 | 0.57 | 0.71 | 0.14 |
   Selenium | 0.37 | 0.47 | 0.33 | 0.41 | 0.41 | 0.95 |