Table 1.
Characteristics of the cohort of 1761 patientsa
| Age, years, mean (SD) | 59.01 (14.02) |
|---|---|
| BMI, kg/m2, mean (SD) | 26.11 (3.26) |
| ASA physical status,n/N(%) | |
| 1. normal healthy patient | 543/1761 (30.8) |
| 2. patient with mild systemic disease | 1027/1761 (58.3) |
| 3. patient with severe systemic disease | 187/1761 (10.6) |
| 4. patient with severe systemic disease that is a constant threat to life | 4/1761 (0.2) |
| Anxiety, HADS,n/N(%) | 318/1705 (18.7) |
| Depression, HADS,n/N(%) | 108/1705 (6.3) |
| Duration of surgery, min, mean (SD) | 45.57 (21.90) |
| Meshless hernia repair | 68/1755 (3.87) |
| Anaesthetic technique,n/N(%) | |
| General | 241/1736 (13.9) |
| Combined (general + local/regional) | 138/1736 (7.9) |
| Neuroaxial | 1296/1736 (74.6) |
| Ilioinguinal, abdominal-genital, or transversus abdominis plane blockade | 12/1736 (0.7) |
| Local anaesthetic infiltration | 49/1736 (2.8) |
| Endovenous opioids during surgery,n/N(%) | 672/1733 (38.8) |
| Complications during surgery,n/N(%) | 20/1734 (1.2) |
| Prior analgesic treatments,n/N(%) | 397/1752 (22.7) |
| Diagnosed chronic illness,n/N(%) | 230/1756 (13.1) |
| Street drug dependence,n/N(%) | 29/1755 (1.6) |
| Alcohol dependence,n/N(%) | 252/1756 (14.4) |
| Smoking,n/N(%) | |
| Smoker | 486/1756 (27.7) |
| Ex-smoker | 388/1756 (22.1) |
| Non-use of nerve-sparing techniques,n/N(%) | 312/1756 (17.8) |
| Hospital stay, days, mean (SD) | 0.61 (1.54) |
a The cohort of patients followed for chronic postsurgical pain after hernia repair, after exclusions and early losses (exitus, missing information before pain screening started, withdrawals) (Fig. 1). Numbers shown in denominators in the table reflect the total number of patients (N) for whom data were available for the variable named