Perioperative characteristics.
| Characteristic | Women (n = 134) | Men (n = 179) | P Valuea |
| Spinal pathology, % (n) | |||
| Degenerative spondylolisthesis | 0.8% (1) | 1.1% (2) | 0.739 |
| Recurrent herniated nucleus pulposus | 95.5% (128) | 91.1% (163) | 0.127 |
| Central stenosis | 18.7% (25) | 29.1% (52) | 0.035 |
| Foraminal stenosis | 6.7% (9) | 5.0% (9) | 0.525 |
| Operative time, min, mean ± SD | 55.1 ± 14.1 | 57.7 ± 14.5 | 0.120 |
| Estimated blood loss, mL, mean ± SD | 41.6 ± 19.8 | 41.1 ± 21.1 | 0.811 |
| Length of stay, h, mean ± SD | 24.9 ± 13.5 | 19.4 ± 12.6 | <0.001 |
| Postoperative narcotic consumption, mean ± SD | |||
| POD 0 | 47.0 ± 36.4 | 47.2 ± 45.2 | 0.975 |
| POD 1 | 18.9 ± 18.8 | 20.5 ± 30.6 | 0.603 |
| Day of discharge, % (n) | 0.017 | ||
| POD 0 | 26.3% (35) | 42.9% (75) | |
| POD 1 | 63.9% (85) | 52.0% (91) | |
| POD 2 | 9.0% (12) | 4.6% (8) | |
| POD 3 | 0.8% (1) | 0.0% (0) | |
| POD 4 | 0.0% (0) | 0.6% (0) |
Note: Boldface indicates statistical significance.
↵a P value calculated using χ 2 analysis or paired sample t test.
Abbreviation: POD, postoperative day of discharge.