Total | OPLL | Non-OPLL | P value | |
---|---|---|---|---|
The preoperative SCD, cm | 1.64 ± 0.15 | 1.62 ± 0.13 | 1.65 ± 0.17 | 0.479 |
The preoperative C2–7 Cobb angle, ° | 12.2 ± 8.6 | 13.9 ± 7.5 | 11.7 ± 8.9 | 0.342 |
The preoperative CCI | 0.09 ± 0.10 | 0.13 ± 0.09 | 0.08 ± 0.10 | 0.038 |
The preoperative spinal canal area, mm2 | 191 ± 33 | 186 ± 31 | 202 ± 38 | 0.135 |
The preoperative ROM, ° | 43.7 ± 11.6 | 43.2 ± 10.7 | 44.0 ± 11.8 | 0.275 |
The preoperative spinal cord area, mm2 | 98 ± 46 | 92 ± 44 | 97 ± 50 | 0.695 |
Door shaft position (wide: narrow) | 38:45 | 9:10 | 29:35 | 0.876 |
Blood loss, ml | 236 ± 177 | 224 ± 189 | 239 ± 174 | 0.745 |
Operative time, min | 147 ± 38 | 144 ± 43 | 147 ± 37 | 0.757 |
Postoperative drainage volume, ml | 270.0 ± 130.3 | 250.0 ± 123.1 | 273.0 ± 117.0 | 0.459 |