Table 4 Assignment table
Factor | Assignment |
|---|---|
Age | ≥ 65 years old = 1, <65 years old = 0 |
BMI | ≥ 25 kg/m2 = 1, <25 kg/m2 = 0 |
Preoperative VAS score | Raw data are used for continuous variables |
Treatment options | Control group = 1; observation group = 0 |
Efficacy | Improvement group = 0; non-improvement group = 1 |