Table 2.
Descriptive characteristics (Mean ± SD) for the selected 870 subjects at baseline
| Variables | Total n = 870 |
Placebo n = 206 |
Ca-only n = 328 |
Ca + D n = 336 |
P |
|---|---|---|---|---|---|
| Age (y) | 66.0 ± 6.9 | 65.2 ± 6.5 | 66.0 ± 6.6 | 66.5 ± 7.5 | 0.13 |
| Body mass index (kg/m2) | 28.8 ± 5.3 | 28.8 ± 5.3 | 28.9 ± 5.4 | 28.7 ± 5.2 | 0.96 |
| Trunk fat (kg) | 14.3 ± 4.7 | 14.3 ± 4.8 | 14.5 ± 4.8 | 14.1 ± 4.6 | 0.53 |
| Trunk lean (kg) | 21.9 ± 3.1 | 22.1 ± 2.9 | 22.0 ± 3.2 | 21.8 ± 3.1 | 0.37 |
| Percentage of trunk fat (%) | 38.6 ± 6.5 | 38.3 ± 6.6 | 38.9 ± 6.8 | 38.5 ± 6.1 | 0.55 |
| 25(OH)D (nmol/L) | 73.2 ± 19.9 | 73.6 ± 20.7 | 73.0 ± 20.4 | 73.1 ± 18.8 | 0.93 |
| Dietary calcium intake (mg/d) | 670 ± 389 | 671 ± 406 | 681 ± 376 | 658 ± 392 | 0.74 |
| Habitual calcium supplement (mg/d) | 347 ± 342 | 334 ± 318 | 342 ± 354 | 359 ± 345 | 0.68 |
| Total calcium intake (mg/d) | 1016 ± 520 | 1004 ± 518 | 1023 ± 508 | 1016 ± 535 | 0.92 |
| Habitual vitamin D supplement (IU/d) | 198 ± 189 | 189 ± 194 | 206 ± 186 | 196 ± 188 | 0.57 |
Note: P values were calculated by analysis of variance (ANOVA) to compare the means of variables among the placebo, Ca-only, and Ca + D groups.