| Model 3 | Model 4 | ||
---|---|---|---|---|
OR (95% CI) | p value | OR (95% CI) | p value | |
Height | <0.001 (<0.001–1.310) | .057 |  |  |
PSL | 1.247 (1.024–1.519) | .028 | 2.141 (0.817–5.611) | .072 |
Median duration of RA |  |  | 0.950 (0.911–0.991) | .126 |
Cervical spine lesion | ||||
 SAS | 6.413 (1.381–29.79) | .018 |  |  |
Procedure | ||||
 Laminoplasty |  |  | Ref |  |
 C1/2 fusion |  |  | 2.919 (0.146–58.29) | .483 |
 OC fusion |  |  | 17.93 (1.242–258.8) | .034 |
 Long fusion |  |  | 108.1 (6.876–1699) | <.001 |