Total | SAI | MAI | LAI | P value | |
---|---|---|---|---|---|
Open angle, ° | 39.78 ± 4.2 | 40.3 ± 4.5 | 39.6 ± 4.2 | 39.1 ± 3.5 | 0.647 |
Door shaft position, N (%) | 0.008 | ||||
Wide opening | 38 | 11 (28.9) | 12 (31.6) | 15 (39.5) | |
Narrow opening | 45 | 23 (51.1) | 17 (37.8) | 5 (11.1) | |
The SCD, cm | |||||
Preop | 1.64 ± 0.15 | 1.64 ± 0.16 | 1.67 ± 0.11 | 1.62 ± 0.16 | 0.497 |
Postop | 2.51 ± 0.17 | 2.48 ± 0.20 | 2.53 ± 0.17 | 2.52 ± 0.12 | 0.528 |
The change | 0.87 ± 0.18 | 0.85 ± 0.21 | 0.86 ± 0.13 | 0.90 ± 0.18 | 0.550 |
C2–7 Cobb angle, ° | |||||
Preop | 12.2 ± 8.6 | 13.4 ± 9.2 | 10.6 ± 7.9 | 12.5 ± 8.5 | 0.436 |
Postop | 11.2 ± 8.7 | 12.4 ± 9.4 | 10.4 ± 8.5 | 10.5 ± 8.0 | 0.677 |
The change | −1.0 ± 7.7 | −1.2 ± 9.4 | −0.2 ± 7.2 | −1.8 ± 5.1 | 0.767 |
CCI | |||||
Preop | 0.09 ± 0.10 | 0.09 ± 0.11 | 0.08 ± 0.10 | 0.09 ± 0.08 | 0.841 |
Postop | 0.08 ± 0.10 | 0.09 ± 0.09 | 0.07 ± 0.13 | 0.08 ± 0.09 | 0.847 |
The change | −0.01 ± 0.07 | −0.01 ± 0.07 | − 0.01 ± 0.08 | − 0.01 ± 0.06 | 0.970 |
Spinal canal area, mm2 | |||||
Preop | 191 ± 33 | 177 ± 30 | 203 ± 34 | 199 ± 29 | 0.004 |
Postop | 337 ± 46 | 321 ± 38 | 353 ± 53 | 343 ± 37 | 0.015 |
The change | 146 ± 29 | 143 ± 28 | 150 ± 30 | 145 ± 29 | 0.678 |
ROM, ° | |||||
Preop | 43.7 ± 11.6 | 42.9 ± 11.7 | 45.5 ± 11.0 | 42.4 ± 12.6 | 0.907 |
Postop | 30.8 ± 11.2 | 31.0 ± 10.9 | 33.1 ± 10.5 | 27.1 ± 12.3 | 0.176 |
The change | −12.9 ± 9.7 | −11.9 ± 10.2 | −12.3 ± 10.0 | −15.3 ± 8.4 | 0.299 |