Table 1.
Baseline characteristics of subjects
| Male | Female | |||
| Age ＜50 years | Age ≥50 years | Premenopausal | Postmenopausal | |
| No. of subjects | 786 | 917 | 1534 | 2512 |
| Age (years) | 36.8±8.7 | 65.8±10.0* | 37.4±8.7 | 63.9±9.1* |
| Weight (kg) | 63.9±12.4 | 63.8±10.8* | 52.7±9.1 | 55.0±8.9 |
| Height (cm) | 168.8±5.8 | 166.7±6.1 | 158.0±4.9 | 155.9±5.3* |
| BMI (kg/m2) | 22.4±3.9 | 22.9±3.3* | 21.1±3.3 | 22.6±3.3 |
| Body composition measures (Kg) | ||||
| Whole body FM | 13.7±7.6 | 15.2±6.5* | 16.7±6.0 | 18.9±6.2† |
| Whole body LM | 47.6±6.0 | 46.1±5.9 | 33.8±4.3 | 34.2±4.0‡ |
| Fat% | 20.2±8.3 | 23.0±7.3* | 30.1±6.7 | 33.6±6.8 |
| Trunk FM | 8.2±5.0 | 9.3±4.4* | 8.7±3.6 | 10.6±3.7† |
| Trunk LM | 22.4±3.0 | 22.4±2.9 | 16.4±2.2 | 17.1±2.1 |
| Appendicular FM | 5.0±2.6 | 5.3±2.1* | 7.3±2.5 | 7.5±2.6* |
| Appendicular LM | 21.4±3.2 | 19.9±3.1 | 14.4±2.2 | 14.0±2.1 |
| A/G FMR | 0.57±0.17 | 0.69±0.19 | 0.42±0.10 | 0.56±0.15* |
| Bone mineral density (g/cm2) | ||||
| Whole body | 1.105±0.109 | 1.109±0.105 | 1.085±0.094 | 0.994±0.106* |
| Lumbar spine | 1.114±0.162 | 1.099±0.200* | 1.124±0.155 | 0.950±0.186* |
| Femoral neck | 0.921±0.140 | 0.839±0.140 | 0.907±0.122 | 0.760±0.132† |
| Total hip | 0.941±0.150 | 0.911±0.147 | 0.942±0.132 | 0.817±0.144† |
| Current smoker (%) | n=141 (17.9%) | n=119 (13.0%) | n=37 (2.4%) | n=70 (2.8%) |
| Current alcohol user (%) | n=121 (15.4%) | n=117 (12.8%) | n=35 (2.3%) | n=38 (1.5%) |
Values are presented as number, mean±SD or percentage.
Compared with the same gender of the different age group (unpaired-sample t-tests or χ2 test).
P value was determined by the unpaired-sample t-tests.
*P <0.001.
†P <0.01.
‡P <0.05.
A/G FMR, android/gynoid fat mass ratio; BMI, body mass index; fat%, percentage of whole body fat mass; FM, fat mass; LM, lean mass.