Risk factors | Univariate logistic regression | Multivariable logistic regression | ||
---|---|---|---|---|
OR (95% CI) | p value | OR (95% CI) | p value | |
SAS | 1.581 (1.420, 1.761) | <.0001 | 1.335 (1.149, 1.551) | 0.0002 |
SDS | 1.487 (1.353, 1.634) | <.0001 | 1.214 (1.070, 1.377) | 0.0026 |
Chronic pain duration | ||||
  <  1 year (reference) | 1 | NA | 1 | NA |
 1–5 years | 1.863 (0.921, 3.765) | 0.0833 | 1.053 (0.367, 3.020) | 0.924 |
  > 5 years | 6.333 (3.272, 12.259) | <.0001 | 2.48 (0.900, 6.828) | 0.0789 |
BMI | 0.951 (0.888, 1.019) | 0.1548 | 0.865 (0.766, 0.977) | 0.0199 |
Aetiology of back pain | ||||
 Spinal stenosis | 2.453 (1.152, 5.222) | 0.02 | 4.252 (1.314, 13.762) | 0.0157 |
 Spondylolisthesis | 2.364 (1.077, 5.187) | 0.0319 | 5.149 (1.514, 17.512) | 0.0087 |
 Disc herniation (reference) | 1 | NA | 1 | NA |
 Preoperative pain score (VAS) | 2.574 (1.774, 3.734) | <.0001 |  |  |
Age | 1.019 (0.994, 1.046) | 0.1379 | Â | Â |
Gender (male) | 0.860 (0.526, 1.405) | 0.5465 | Â | Â |
Duration of surgery | 1.019 (0.995, 1.045) | 0.1274 | Â | Â |
Smoking | 1.166 (0.709, 1.918) | 0.5449 | Â | Â |
Frail | 1.063 (0.768, 1.471) | 0.7134 | Â | Â |
Operation history | 1.025 (0.752, 1.398) | 0.8762 | Â | Â |