| Extra pain | Regular pain | P value | |
| 17 | 79 | ||
| Age, y | 58.4 | 63.7 | 0.08 |
| BMI | 29 | 30 | 0.3 |
| CK, IU/L | 1421 | 1135 | 0.4 |
| x upper normal limit | 4.8 | 3.8 | 0.4 |
| Sex, female | 58% | 57% | 0.8 |
| Diabetes | 5.8% | 12.6% | 0.5 |
| Depression | 29.4% | 31% | 0.8 |
| Hospitalization time, d | 8.9 | 8.4 | 0.8 |
| CRP, mg/L | 20.4 | 29.7 | 0.14 |
| Operating time, min | 290 | 276 | 0.51 |
| No. fused segments | 1.9 | 2 | 0.88 |