Scheduled group compared with decompensated group — patient characteristics and surgical factors
| Characteristic | Scheduled group n = 4654 | Decompensated group n = 214 | p value |
|---|---|---|---|
| Age, mean ± SD | 56.0 ± 15.4 | 57.1 ± 16.7 | 0.20 |
| Male, no. (%) | 2255/4654 (48.5) | 106/192 (55.2) | 0.37 |
| Diagnosis, no. (%) | |||
| Disc herniation | 1478/4654 (31.8) | 76/214 (35.5) | 0.26 |
| Myelopathy | 48/4654 (1.0) | 7/214 (3.3) | 0.01 |
| Degenerative spondylolisthesis | 1286/4654 (27.6) | 43/214 (20.1) | 0.02 |
| Degenerative spinal stenosis | 1842/4654 (39.6) | 88/214 (41.1) | 0.67 |
| Spinal segment involved, no. (%) | |||
| Cervical | 667/3609 (18.5) | 43/186 (23.1) | 0.12 |
| Thoracic | 142/3609 (3.9) | 18/186 (9.7) | 0.001 |
| Lumbar | 2887/3609 (80.0) | 132/186 (71.0) | 0.004 |
| Instrumentation used, no. (%) | 1267/1810 (70.0) | 51/86 (59.3) | 0.04 |
| Operative time, h, mean ± SD | 3.0 ± 3.1 | 3.0 ± 3.1 | 0.62 |
| Length of stay, d, median (IQR) | 3.6 (1.3–6.4) | 7.0 (3.3–15.0) | < 0.001 |
| Discharged home, no. (%) | 4386/4654 (94.2) | 166/214 (77.6) | < 0.001 |
IQR = interquartile range; SD = standard deviation.
Differing denominators indicates missing data for some patients in some categories.