Table 1. Sample statistics.
| Variable | n (%) | Range | Mean |
|---|---|---|---|
| Male | 12 (18) | ||
| Female | 53 (82) | ||
| Age at surgery (y) | 24–80 | 60 | |
| Follow up (mo) | 2–133 | 26 | |
| Duration of surgery (min) | 256–768 | 438 | |
| No. of levels fused | 3–16 | 8 | |
| ICU stay | 0–5 | 1 | |
| Hospital stay (d) | 3–24 | 7.6 | |
| Estimated blood loss (mL) | 450–9,000 | 2,371 | |
| Intraoperative (U) | 0–14 | 2 | |
| Perioperative (U) | 0–59 | 3 | |
| Intraoperative blood salvage (mL) | 250–4,000 | 1,130 | |
| Preoperative C7 plumb line | −44–293 | 118 | |
| Postoperative C7 plumb line | −44–175 | 53 | |
| Preoperative lumbar lordosis | 28 to −59 | −16 | |
| Postoperative lumbar lordosis | −15 to −73 | −41 | |
| Perioperative deaths | 3 (4.6) | ||
| Prior surgeries | 55 (84.6) | ||
| 1 | 16 (24.6) | ||
| 2 | 12 (18.4) | ||
| 3 | 6 (9.2) | ||
| 4 | 21 (32.3) | ||
| Comorbidities | 56 (86.1) | 1.78 | |
| 1 | 21 (32.3) | ||
| 2 | 17 (26.1) | ||
| 3 | 12 (18.4) | ||
| 4 | 5 (6) | ||
| 5 | 1 (1) | ||
| Minor complications | 15 (23) | ||
| 1 | 12 (18.4) | ||
| 2 | 1 (1.5) | ||
| 3 | 2 (3) | ||
| Major complications | 10 (15.4) | ||
| 1 | 8 (12.3) | ||
| 2 | 1 (1.5) | ||
| 4 | 1 (1.5) | ||
| Postoperative complications (major + minor) | 20 (30.8) | ||
| 1 | 12 (18.4) | ||
| 2 | 5 (7.7) | ||
| 3 | 1 (1.5) | ||
| 4 | 1 (1.5) | ||
| 5 | 1 (1.5) | ||
| Revision surgeries | 22 (33.8) | ||
| <3 mo | 11 (16.9) | ||
| >3 mo | 11 (16.9) |
Abbreviation: ICU, intensive care unit.