Demographic, clinical and surgical variables.
| BMA (n = 80) | |
|---|---|
| Mean age, SD* (range) | 58.1 +/- 1.8 (16-80) |
| Gender | |
| Male (%) | 29 (36.3%) |
| Female (%) | 51 (63.7%) |
| Mean Charlson co-morbidity index score (range) | 2.10 (0-9) |
| Smoker (%) | 8 (10%) |
| Primary surgery (%) | 60 (75%) |
| Mean estimated blood loss in milliliters (range) | 252.2 (20-900) |
| Mean number of fused spine levels (range) | 1.3 (1-3) |
| Mean number of hospital stay in days (range) | 5.2 (4-16) |
| Mean follow-up time in months (range) | 33.2 (12-89.6) |
↵* SD (standard deviation).