Table 2.
Age-stratified analyses of case-distributions and BMD measurements
| Age (years) | Osteoporosis (n = 1445) |
T value (mean ± SD) |
Osteopenia (n = 896) |
T value (mean ± SD) |
Normal BMD (n = 2031) |
T value (mean ± SD) |
|||
|---|---|---|---|---|---|---|---|---|---|
| # cases | % | # cases | % | # cases | % | ||||
| < 30 | 5 | 0.34 | -2.84 ± 0.22* | 10 | 1.12 | -1.27 ± 0.26 | 13 | 0.64 | 0.77 ± 0.26** |
| 30-39 | 7 | 0.48 | -2.75 ± 0.21* | 14 | 1.56 | -1.16 ± 0.46 | 218 | 10.73 | 0.78 ± 0.22** |
| 40-49 | 59 | 4.05 | -2.86 ± 1.18* | 78 | 8.71 | -1.23 ± 0.51 | 580 | 28.56 | -0.23 ± 0.51** |
| 50-59 | 475 | 32.65 | -2.94 ± 0.28* | 245 | 27.34 | -1.39 ± 0.47 | 768 | 37.81 | -0.39 ± 0.47** |
| 60-69 | 555 | 38.14 | -2.97 ± 0.31* | 312 | 34.82 | -1.47 ± 0.52 | 298 | 14.67 | -0.47 ± 0.52** |
| > 69 | 354 | 24.33 | -3.04 ± 0.36* | 237 | 26.45 | -1.37 ± 0.61 | 154 | 7.89 | -0.37 ± 0.21** |
*comparison of bone density in age groups in osteoporosis group, ANOVA analysis;
**comparison of bone density in age groups in normal BMD group, ANOVA analysis