Multivariable model of predictors of maximum acute postoperative pain score
| Parameter | Mean acute pain effect estimate | 95% confidence limits | P value | |
| Intercept | 4.76 | 3.86 | 5.67 | <0.01 |
| Surgery duration (per additional 30 min) | 0.39 | 0.17 | 0.61 | <0.01 |
| Previous radiotherapy (Y vs N) | −2.68 | −4.78 | −0.57 | 0.01 |
| PCS (score 10–19 vs <10) | 1.70 | 0.54 | 2.86 | <0.01 |
| PCS (score ≥20 vs <10) | 3.28 | 1.70 | 4.87 | <0.01 |
| Surgeon (ID 2 vs ID 1) | 0.33 | −0.94 | 1.62 | 0.60 |
| Surgeon (ID 3 vs ID 1) | −1.22 | −2.34 | −0.10 | 0.03 |
| Surgeon (ID 4 vs ID 1) | 0.54 | −1.69 | 2.77 | 0.63 |
Reference levels set to average surgery duration (120 min), no previous radiotherapy, PCS score <10.
PCS, Pain Catastrophizing Scale.