Table 1.
Baseline characteristics of women1
| Variable | All (n=168) | Weight loss (n=104) | Weight maintenance (n=64) | P value for WL/WM groups2 |
|---|---|---|---|---|
| Age | 53.0 ± 11.4 | 53.1 ± 11.5 | 52.7 ± 11.3 | 0.799 |
| Weight (kg) | 75.8 ± 10.2 | 76.2 ± 10.8 | 75.0 ± 9.1 | 0.422 |
| BMI (kg/m2) | 28.6 ± 3.2 | 28.5 ± 3.3 | 28.7 ± 3.0 | 0.657 |
| Lean mass (kg)3 | 40.1 ± 4.8 | 40.2 ± 4.9 | 40.0 ± 4.7 | 0.848 |
| Fat mass (kg)3 | 31.6 ± 6.9 | 31.9 ± 7.2 | 31.2 ± 6.3 | 0.493 |
| BMC (g)4 | 2442 ± 336 | 2452 ± 330 | 2424 ± 348 | 0.601 |
| FCA (%) | 24.9 ± 7.6 | 24.6 ± 7.0 | 25.5 ± 8.5 | 0.471 |
| Hormones | ||||
| Estradiol (pg/ml)6 | 22.7 ± 21.5 | 23.3 ± 22.2 | 21.9 ± 20.5 | 0.690 |
| PTH (pg/ml) | 40.2 ± 21.7 | 40.9 ± 22.6 | 39.0 ± 20.4 | 0.398 |
| 25(OH)D (ng/ml) | 29.6 ± 8.6 | 28.7 ± 8.1 | 31.0 ± 9.4 | 0.093 |
| 1,25(OH)2D (pg/ml) | 50.6 ± 16.6 | 51.3 ± 16.6 | 49.4 ± 16.8 | 0.488 |
| Nutrient Intake7 | ||||
| Calcium (mg/day) | 1193 ± 401 | 1181 ± 417 | 1212 ± 375 | 0.628 |
| Vitamin D (μg/day)5 | 11.9 ± 2.2 | 11.9 ± 2.5 | 11.8 ± 1.9 | 0.776 |
BMI body mass index, FCA true fractional calcium absorption, BMC total body bone mineral content, 1,25(OH)2D 1,25-dihydroxyvitamin D3, 25OHD 25-hydroxyvitamin D (multiply by 2.5 to convert to nmol/L), PTH parathyroid hormone
Data (mean ± SD)
Analysis was performed using a one-way ANOVA.
Missing subjects, c(n=1), d(n=2); e(n=4)
Missing subjects, c(n=1), d(n=2); e(n=4)
Missing subjects, c(n=1), d(n=2); e(n=4)
Estradiol was non-normally distributed, therefore we calculated the median and IQR for each group: All, 16.1 (3.6-133.5); WL, 17.5 (4.9-133.5); WM, 15.2 (3.6-125.0). The log transformation of estradiol was normally distributed.
Nutrient intake includes the amount from diet plus multivitamin/mineral with 10 μg (400 IU) of vitamin D and 200 mg Ca plus individualized Ca supplement.