Table 1.
Characteristics Between RA and Controls
| Indicators | RA (n=549) | Controls (n=158) | P= |
|---|---|---|---|
| Age (year) | 55.6±13.3 | 53.9±12.5 | 0.137 |
| Female, n (%) | 448 (81.6%) | 128 (81.0%) | 0.882 |
| BMI (kg/m2) | 22.4±3.8 | 23.06±3.04 | 0.099 |
| BMD-Neck (g/cm2) | 0.79±0.16 | 0.92±0.15 | 0.0001 |
| BMD-Hip (g/cm2) | 0.82±0.16 | 0.97±0.15 | 0.0001 |
| BMD-L1 (g/cm2) | 0.88±0.16 | 1.03±0.19 | 0.0001 |
| BMD-L2 (g/cm2) | 0.94±0.18 | 1.07±0.19 | 0.0001 |
| BMD-L3 (g/cm2) | 1.02±0.19 | 1.14±0.19 | 0.0001 |
| BMD-L4 (g/cm2) | 1.03±0.19 | 1.13±0.18 | 0.0001 |
| BMD-L1-4 (g/cm2) | 1.00±0.18 | 1.11±0.18 | 0.0001 |
| SMI (kg/m2) | 5.64±1.09 | 8.67±1.43 | 0.0001 |
Abbreviations: BMI, body mass index; BMD, bone mineral density; SMI, skeletal muscle index.