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Bone mineral density around Proxima stem in young and elderly patient groups
| Period | Younger group (< 65 yrs) | Elderly group (> 66 yrs) | ||
|---|---|---|---|---|
| Zone 1 | Zone 7 | Zone 1 | Zone 7 | |
| One week after surgery (g/cm2) | 3.128 ± 0.321 | 3.431 ± 0.328 | 2.893 ± 0.918 | 3.125 ± 0.219 |
| Six years after surgery (g/cm2) | 3.429 ± 0.387 | 3.108 ± 0.285 | 3.125 ± 0.112 | 2.830 ± 0.851 |
| Difference (%) | 0.301 ± 0.66 (9.6) | −0.323 ± 0.043 (−9.4) | 0.232 ± 0.806 (8.0) | −0.295 ± 0.632(−9.4) |
| P-value (paired t-test) | <0.001 | 0.165 | <0.001 | 0.168 |
