De novo emergency group compared with decompensated group — patient characteristics and surgical factors
| Characteristic | De novo group n = 1349 | Decompensated group n = 214 | p value |
|---|---|---|---|
| Age, mean ± SD | 53.2 ± 16.9 | 57.1 ± 16.7 | 0.004 |
| Male, no. (%) | 575/982 (58.6) | 106/192 (55.2) | 0.42 |
| Diagnosis, no. (%) | |||
| Disc herniation | 794/1349 (58.9) | 76/214 (35.5) | < 0.001 |
| Myelopathy | 15/1349 (1.1) | 7/214 (3.3) | 0.02 |
| Degenerative spondylolisthesis | 87/1349 (6.5) | 43/214 (20.1) | < 0.001 |
| Degenerative spinal stenosis | 453/1349 (33.6) | 88/214 (41.1) | 0.04 |
| Spinal segment involved, no. (%) | |||
| Cervical | 191/809 (23.6) | 43/186 (23.1) | 0.92 |
| Thoracic | 47/809 (5.8) | 18/186 (9.7) | 0.07 |
| Lumbar | 602/809 (74.4) | 132/186 (71.0) | 0.36 |
| Instrumentation used, no. (%) | 190/387 (49.1) | 51/86 (59.3) | 0.10 |
| Operative time, h, mean ± SD | 2.4 ± 2.9 | 3.0 ± 3.1 | 0.03 |
| Length of stay, d, median (IQR) | 4.9 (2.4–10.6) | 7.0 (3.3–15.0) | 0.85 |
| Discharged home, no. (%) | 1063/1349 (78.8) | 166/214 (77.6) | 0.72 |
IQR = interquartile range; SD = standard deviation.
Differing denominators indicates missing data for some patients in some categories.