Table 2.
Comparison between pre- and post-operative BMD results based on DEXA imaging.
| DEXA study | Pre-operative result | Post-operative result (6 months) | Improvement from baseline | Post-operative result (18 months) | Improvement from baseline |
|---|---|---|---|---|---|
| Lumbar spine BMD | 0.677 g/cm2 | 1.323 g/cm2 | +0.646 g/cm2 (95.4%) | 1.293 g/cm2 | +0.616 g/cm2 (91.0%) |
| Lumbar spine T-score | −4.7 | −0.5 | – | +0.4 | – |
| Lumbar spine result | Severe osteoporosis | Normal | – | Normal | – |
| Left femoral neck BMD | 0.531 g/cm2 | 1.008 g/cm2 | +0.477 g/cm2 (89.8%) | 1.260 g/cm2 | +0.729 g/cm2 (137.3%) |
| Left femoral neck T-score | −4.1 | +0.7 | – | +1.5 | – |
| Left femoral neck result | Severe osteoporosis | Normal | – | Normal | – |
| Distal radius BMD | 0.958 g/cm2 | 0.977 g/cm2 | +0.019 g/cm2 (1.8%) | 0.962 g/cm2 | +0.004 g/cm2 (0.4%) |
| Distal radius T-score | −0.3 | −0.1 | – | −0.3 | – |
| Distal radius result | Normal | Normal | – | Normal | – |
Lumbar spine = L2-L4; DEXA = dual-energy X-ray absorptiometry; BMD = bone mineral density; Osteoporosis = T-score below −2.5 (>2.5 standard deviations below the mean)
Results demonstrate severe pre-operative osteoporosis at the lumbar spine and left femoral neck with sparing of the distal radius. Post-operative DEXA BMD demonstrated resolution of severe osteoporosis and significant improvement in BMD at lumbar-spine and left femoral neck, with negligible changes seen at the distal radius. Improvements in BMD were sustained at 18-months follow-up.