Table II.
Comparison of BMD (g/cm2).
| Group | Case no. | Age (years) | Menopause time (years) | Lumbar vertebrae | Femoral neck | Total hip | T value | Normal bone mass, case (%) | Osteopenia, case (%) | Osteoporosis, case (%) | Severe osteoporosis, case (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Observation | 404 | 62.5±7.4 | 12.4±3.8 | 1.16±0.07 | 0.95±0.07 | 1.03±0.07 | −1.3±0.3 | 284 (70.3) | 120 (29.7) | 0 (0.0) | 0 (0.0) |
| Control | 1,212 | 63.4±7.7 | 13.0±4.2 | 0.87±0.06 | 0.76±0.05 | 0.84±0.04 | −4.2±0.5 | 0 (0.0) | 0 (0.0) | 726 (59.9) | 486 (40.1) |
| t (χ2) | 0.625 | 0.857 | 5.326 | 5.748 | 5.932 | 12.332 | 1616.000 | ||||
| P-value | 0.437 | 0.629 | 0.036 | 0.032 | 0.026 | <0.001 | <0.001 | ||||
BMD, bone mineral density.