Table 3.
Characteristics of men according to the tertiles of dietary intakes of calcium
| Categories of calcium intake (mg/day) | |||
|---|---|---|---|
| Dietary calcium (mg/day)1 | ≤800 | 801–1000 | 1001–2486 |
| Participants | 122 | 77 | 224 |
| Dietary calcium (mg/day)*** | 566 ± 161 | 900 ± 59 | 1333 ± 299 |
| Age: years | 64.1 ± 9.9 | 64.3 ± 9.8 | 64.2 ± 9.9 |
| Education: % (n) | |||
| Primary or less | 81.4 | 78.7 | 86.4 |
| Secondary or higher | 18.6 | 21.3 | 13.6 |
| Family history of prostate cancer: % (n) | 10.7 | 18.4 | 13.4 |
| Current smoker: % (n) | 11.5 | 11.8 | 19.6 |
| Physical activity: %* | |||
| Inactive/moderately inactive | 53.4 | 51.3 | 39.6 |
| Moderately active/active | 46.6 | 48.7 | 60.4 |
| Body mass index (BMI) kg/m2 | 25.5 ± 4.4 | 25.9 ± 4.7 | 24.9 ± 4.4 |
| Energy intake (kcal/day)*** | 2076 ± 710 | 2749 ± 618 | 3630 ± 501 |
| Phosphorus intake (mg/day)*** | 1148 ± 327 | 1607 ± 306 | 2165 ± 511 |
| Vitamin D (IU/day)*** | 284 ± 97 | 656 ± 114 | 1256 ± 325 |
1
Tertiles based on dietary reference intakes (average requirement, 800–1000 mg/day; recommended dietary allowance, 1000–12000 mg/day; upper level of intake, 2000–25000 mg/day). Institute of Medicine FaNB 39.
*P < 0.05; ***P < 0.0001.