Table 1

Age-standardized baseline characteristics of 47,780 men in the HPFS by use of supplemental vitamin E in 1986

User of supplemental vitamin E in 1986 (n = 20,828)Nonuser of supplemental vitamin E in 1986 (n = 26,952)
Meansa
 Age (yr)53.855.3
 BMI (kg/m2)24.725.1
 BMI at age 21 (kg/m2)21.922.0
 Physical activity (MET-h/wk)24.423.3
 Supplemental vitamin E (IU/ day)1910
 Dietary vitamin E (IU/day)11.511.1
 Total years taking vitamin E before 19863.20.4
 Energy (kcal/day)1,9851,986
 Calcium (mg/day)1,013809
 Fructose (g/day)5049
 Lycopene (ug/day)10,44510,319
 Fat (g/day)7072
Percenta
 Users of supplemental vitamin E in 1990b77.116.3
 Users of supplemental vitamin E in 1994c85.738.6
 Never-smokers48.448.6
 Distant past smokers30.029.0
 Current smokers/recent quitters21.622.4
 Family history of prostate cancer (father or brother) reported in 19905.75.4
 Vasectomy (ever/never)24.924.1
  • a Means and percents are age standardized across 11 categories of age. BMI, body mass index; MET, h/wk, metabolic equivalents.

  • b Computed among the men who returned a 1990 questionnaire.

  • c Computed among the men who returned a 1994 questionnaire.