Table 1.
Baseline characteristics stratified by sex.
| Variable | Women (n = 1270) | Men (n = 773) | P-value |
|---|---|---|---|
| Age, yr | 45.9 (14.6) | 44.0 (14.7) | 0.005 |
| Weight, kg | 52.9 (7.5) | 62.3 (8.5) | < 0.001 |
| Height, cm | 154 (5.4) | 165 (5.6) | < 0.001 |
| Body mass index, kg/m2 | 22.4 (3.1) | 23.0 (2.9) | < 0.001 |
| BMI group, n,% | < 0.001 | ||
| Under-weight | 32 (2.5%) | 13 (1.7%) | |
| Normal-weight | 744 (58.6%) | 391 (50.6%) | |
| Over-weight | 412 (32.4%) | 315 (40.8%) | |
| Obese | 82 (6.5%) | 54 (7.0%) | |
| Femoral neck BMD, g/cm2 | 0.70 (0.12) | 0.79 (0.12) | < 0.001 |
| Total hip BMD, g/cm2 | 0.81 (0.12) | 0.90 (0.12) | < 0.001 |
| Lumbar spine BMD, g/cm2 | 0.90 (0.14) | 0.94 (0.12) | < 0.001 |
| Calcaneus BUA, dB/MHz | 66.7 (9.60) | 68.0 (9.16) | 0.004 |
Values are mean (SD), unless otherwise specified.
BMD, bone mineral density; DXA: dual-energy X-ray absorptiometry; BUA, broadband ultrasound attenuation; QUS, quantitative ultrasound; SD, standard deviation; P-values were derived from t-test for continuous variables and Chi-squared test for categorical variables.