Table 5.
Comparison of prevalence of osteoporosis by dual-energy X-ray absorptiometry (T-score of ≤ −2.5) in lumbar spine and hip among ages in women before total knee arthroplasty using Fisher's exact test with multiple comparisons corrected by Bonferroni's method.
| Anatomical Site; N (%) | 60s (N = 56) | 70s (N = 104) | 80s (N = 39) | Sig. |
|---|---|---|---|---|
| Lumbar | 3 (5) | 18 (17) | 1 (3) | 0.014(1) |
| Total-Hip | 1 (2) | 11 (11) | 7 (18) | 0.018(2) |
| Femoral neck | 1 (2) | 12 (12) | 11 (29) | < 0.001(3) |
Sig.: significance. <70 years: 60s, <80 years: 70s, and ≥80 years: 80s. Boldface p-values are considered statistically significant.
The results of multiple comparisons are as follows: (1)There was a significant difference in the comparison among the three groups, but no significant combination of the two groups could be detected in the multiple comparison. (2)p = 0.023 between 60s and 80s, (3)p < 0.001 between 60s and 80s.