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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

  Premenopausal Postmenopausal
Characteristic Cases (N = 866) Controls (N = 845) p Cases(1496) Controls (n = 1617) P
  Mean Mean   Mean Mean  
From diet       
   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)       
   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