Table 2

Prostate cancer incidence by total calcium intake, CPS-II Nutrition Cohort, 1992–1999

Total calcium intake (mg/day)Prostate cancer casesPerson-yearsRR (95% CI)aRR (95% CI)bRR (95% CI)c
Total prostate cancer cases
 <7001323147,858111
 700–9991293137,1840.9 (0.9–1.1)1.0 (0.9–1.1)1.0 (0.9–1.1)
 1000–149983588,0231.0 (0.9–1.1)1.0 (0.9–1.1)1.0 (0.9–1.1)
 1500–199926523,1741.2 (1.0–1.3)1.1 (1.0–1.3)1.3 (1.1–1.5)
 ≥2000958,1521.2 (1.0–1.4)1.1 (0.9–1.4)1.2 (1.0–1.6)
P trend = 0.06P trend = 0.15P trend = 0.02
Advanced prostate cancer cases
 <700220140,700111
 700–999167129,9050.8 (0.6–1.0)0.8 (0.7–1.0)0.9 (0.7–1.1)
 1000–149913483,5051.0 (0.8–1.2)1.0 (0.8–1.2)1.2 (0.9–1.7)
 1500–19993321,6700.9 (0.6–1.3)0.9 (0.6–1.4)1.3 (0.8–2.1)
 ≥20001576311.2 (0.7–2.0)1.2 (0.7–2.1)1.6 (0.9–3.0)
P trend = 0.80P trend = 0.66P trend = 0.08
  • a Adjusted for age at entry and race.

  • b Adjusted for age at entry, race, family history of prostate cancer, total energy, total fat intake, and education.

  • c Adjusted for age at entry, race, family history of prostate cancer, total energy, total fat intake, education, phosphorus and total vitamin D.