Table 1.
Characteristics of men from the MrOs study and the Tobago study by race
| Caucasians (N=446) | African Ancestry (N=496) | P-value | |
|---|---|---|---|
| Serum 25(OH)D level, mean (SD), ng/ml | 27.6 ± 8.3 | 34.7 ± 9.7 | <0.001 |
| Age, mean (SD), yrs | 76.9 ± 4.9 | 71.6 ± 5.9 | <0.001 |
| BMI, mean (SD), kg/m2 | 28.5 ± 4.2 | 27.2 ± 9.1 | 0.009 |
| Season of blood draw, % | 0.006 | ||
| Winter | 24.2 | 31.6 | |
| Spring | 26.7 | 20.0 | |
| Summer | 24.9 | 20.4 | |
| Fall | 24.2 | 28.0 | |
| Attended college, % | 46.9 | 3.8 | <0.001 |
| Average walk time per day,% | |||
| ≤1 hour | 45.7 | 92.7 | |
| >1 hour | 53.3 | 7.3 | |
| Caffeine intake, median (IQR), mg/day | 184.0 (0.0–408.0) | 100.0 (45.0–150.0) | <0.001 |
| Alcohol, median (IQR), drinks/week | 0.5 (0.0–6.0) | 0.0 (0.0–1.0) | <0.001 |
| Smoking currently,% | 3.6 | 6.1 | 0.080 |
| Dietary calcium intake, mean (SD), mg/day | 793.5 ± 356 | 439.0 ± 209.8 | <0.001 |
| Supplemental calcium, % | 64.6 | 28.8 | <0.001 |
| Health good or excellent, % | 89.2 | 82.0 | 0.002 |
| History of any fracture, % | 54.7 | 13.0 | <0.001 |
| Diabetes, % | 19.7 | 34.1 | <0.001 |
| Hypertension, % | 52.9 | 46.2 | 0.041 |
| Myocardial Infarction, % | 16.1 | 1.4 | <0.001 |
| Osteoporosis, % | 3.6 | 3.1 | 0.716 |
| Osteoarthritis, % | 26.7 | 5.6 | <0.001 |
| Rheumatoid arthritis, % | 6.7 | 3.7 | 0.040 |