Table 1.

Selected comparisons between placebo and calcium groups

VariablePlacebo (n = 327)*Calcium (n = 345)*
Age, mean ± SD (y)61.8 ± 8.761.8 ± 8.6
African American race, n (%)18 (5.5)18 (5.2)
Months on treatment, mean ± SD43.9 ± 7.744.0 ± 9.4
Months taking ≥50% of study pills, mean ± SD38.6 ± 12.536.9 ± 13.8
Total months of follow-up, mean ± SD123.8 ± 34.2122.3 ± 36.2
Total calories (kcal), mean ± SD2,139 ± 7522,149 ± 760
Dietary calcium intake (mg), mean ± SD902 ± 435919 ± 466
Baseline PSA (ng/mL), mean ± SD1.88 ± 2.521.72 ± 2.93
  • * n includes all men who were randomized.

  • Estimated from food frequency questionnaires administered at the baseline for 320 men assigned to placebo and 336 men assigned to calcium.

  • Determined for 263 men assigned to placebo and 279 to calcium who had baseline and year 4 measurements.