Table I.
Summary of descriptive characteristics of the 361 patients in the study
| Characteristic | |
|---|---|
| Mean age, yrs (sd; range) | 61.81 (12.31; 21 to 89) |
| Gender (female/male), n (%) | 294 (81.4)/67 (18.6) |
| Knee side (left/right), n (%) | 212 (58.7)/149 (41.3) |
| Mean BMI, kg/m2 (sd; range) | 24.32 (3.01; 15.39 to 33.87) |
| Mean BMD, g/cm2 (sd; range) | |
| Lumbar spine (L1 to L4) | 1.01 (0.18; 0.56 to 1.91) |
| Hip | 0.88 (0.13; 0.48 to 1.36) |
| Mean T-score (sd; range) | |
| Lumbar spine (L1 to L4) | -0.79 (0.39; -2.72 to 3.10) |
| Hip | -0.65 (1.05; -3.80 to 3.20) |
| Diagnostic categories, n (%)*† | |
| Normal | 228 (63.2) |
| Osteopenia | 99 (27.4) |
| Osteoporosis | 34 (9.4) |
*
According to the World Health Organization criteria35
†
Lowest BMD T-score in the lumbar spine or hip was considered
BMI, body mass index; BMD, bone mineral density