Demographics of patients undergoing primary 1- to 2-level lumbar fusion with an Elixhauser Comorbidity Index score of 1 to 5 within the Medicare database.
| Demographics | n (%) |
| Age, y | |
| <64 | 23,040 (21.91%) |
| 65–69 | 44,660 (42.48%) |
| 70–74 | 21,160 (20.12%) |
| 75–79 | 10,760 (10.23%) |
| 80–84 | 3952 (3.75%) |
| >85 | 876 (0.83%) |
| Unknown | 672 (0.63%) |
| Sex | |
| Women | 56,216 (53.47%) |
| Men | 48,232 (45.88%) |
| Unknown | 672 (0.63%) |