| Model 1 | Model 2 | ||
---|---|---|---|---|
OR (95% CI) | p value | OR (95% CI) | p value | |
Height | 0.915 (0.860–0.974) | .005 | 0.931 (0.872–0.995) | .034 |
ASA-PS | 2.622 (1.023–6.717) | .045 | 2.141 (0.817–5.611) | .123 |
Median duration of RA | 0.953 (0.918–0.990) | .012 | 0.950 (0.911–0.991) | .017 |
Cervical spine lesion | ||||
 SAS | 2.555 (0.993–6.571) | .052 |  |  |
Procedure | ||||
 Laminoplasty |  |  | Ref |  |
 C1/2 fusion |  |  | 0.956 (0.221–4.132) | .952 |
 OC fusion |  |  | 2.467 (0.777–7.826) | .125 |
 Long fusion |  |  | 7.289 (1.694–31.36) | .008 |