Table 4.
Patients with chronic postoperative pain and pain severity measured with the NPSI by study group.
| Months after Discharge | QLB | CON | p-Value |
|---|---|---|---|
| Median (interquartile range) persistent pain severity | |||
| 1 | 25 (19–35) | 43 (34–48) | <0.001 |
| 3 | 15 (13–22) | 29 (17–32) | <0.001 |
| 6 | 7 (4–11) | 15 (7–21) | <0.001 |
| Number (%) of patients with persistent pain | |||
| 1 | 41 (98) | 40 (95) | 1 |
| 3 | 38 (95) | 40 (95) | 1 |
| 6 | 34 (85) | 38 (95) | 0.26 |
Probability was calculated with the Mann–Whitney U test for pain severity and Fisher’s exact test for persistent pain incidence. CON: control group; NPSI: Neuropathic Pain Symptom Inventory; QLB: quadratus lumborum block group.