Patient demographics
| ≤6 Weeks | 6–24 Weeks | >24 Weeks | P | |
|---|---|---|---|---|
| No. of patients and levels | 153 | 124 | 44 | |
| Age (yr) (mean) (SD, range) | 76 (10.2, 41–95) | 74 (11.7, 44–96) | 67 (16.1, 31–89) | <.0001 |
| Female | 63% | 72% | 57% | .14 |
| Preoperative pain length, (mean) (SD) | 3.3 (1.7) | 12.9 (4.8) | 41.1 (21.8) | <.0001 |
| Most frequently treated level | L1 | L1 | L1 | .21a |
| Incident fracture rate within 1 year follow-up | 14% | 21% | 12% | .13 |
↵a Comparison of all levels in each group of patients.