Age, mean ± SD | 54.9 ± 15.8 | 56.0 ± 15.4 | 53.9 ± 16.9 | < 0.001 |
Male, no. (%) | 2936/6217 (47.2) | 2255/3848 (58.6) | 681/1174 (58.0) | 0.73 |
Diagnosis, no. (%) |
Disc herniation | 2348/6217 (37.8) | 1478/4654 (31.8) | 870/1563 (55.7) | < 0.001 |
Myelopathy | 70/6217 (1.1) | 48/4654 (1.0) | 22/1563 (1.4) | 0.27 |
Degenerative spondylolisthesis | 1416/6217 (22.8) | 1286/4654 (27.6) | 130/1563 (8.3) | < 0.001 |
Degenerative spinal stenosis | 2383/6217 (38.3) | 1842/4654 (39.6) | 541/1563 (34.6) | < 0.001 |
Spinal segment involved, no. (%) |
Cervical | 901/4604 (19.6) | 667/3609 (18.5) | 234/995 (23.5) | < 0.001 |
Thoracic | 207/4604 (4.5) | 142/3609 (3.9) | 65/995 (6.5) | < 0.001 |
Lumbar | 3621/4604 (78.7) | 2887/3609 (80.0) | 734/995 (73.8) | < 0.001 |
Instrumentation used, no. (%) | 1508/2283 (66.1) | 1267/1810 (70.0) | 241/473 (51.0) | < 0.001 |
Operative time, h, mean ± SD | — | 3.0 ± 3.1 | 2.5 ± 3.0 | < 0.001 |
Length of stay, d, median (IQR) | — | 3.6 (1.3–6.4) | 5.1 (2.7–11.2) | < 0.001 |
Discharged home, no. (%) | 5615/6217 (90.3) | 4386/4654 (94.2) | 1229/1563 (78.6) | < 0.001 |
Placed on surgical waitlist, no. (%) | — | — | 214/1563 (13.7) | — |