Table 1

Baseline characteristics of the intervention and control groups

Intervention (n = 100) Mean or %Control (n = 101) Mean or %P
Demographics
Age (yr)58.660.00.21
Male (%)71.071.30.96
Household income ($1000)51.349.80.57
Education (yr)14.614.50.70
Married (%)79.087.10.12
Employed (%)61.052.50.21
White (%)99.099.00.99
Lifestyle and physiologic variables
Tobacco
% smokers17.017.80.88
No. of cigarettes/day among smokers19.616.00.26
Body mass index (kg/m2)
Men28.328.40.90
Women25.826.20.75
Alcohol
% consumers81.485.40.55
No. of drinks/wk among drinkers4.73.90.26
Nutrient supplements
% users42.036.60.44
% users of β-carotene supplements5.03.00.46