Table 1 Demographics and clinical characteristics of the patients
|  |  | QLB group (n = 28) | Control group (n = 29) |
|---|---|---|---|
Age (years) |  | 74.8 ± 6.2 | 75.6 ± 7.6 |
Sex ratio [n (%)] | male | 16 (57.1%) | 18 (62.1%) |
BMI (kg/m2) |  | 22.2 ± 3.1 | 20.8 ± 3.2 |
Education (years) |  | 7.4 ± 2.4 | 7.0 ± 2.0 |
ASA [n (%)] | Â | Â | Â |
 I  II |  | 10 (35.7%) 18 (64.3%) | 8 (27.6%) 21 (72.4%) |
Comorbidities [n (%)] | Â | Â | Â |
 Hypertension  Diabetes |  | 13 (46.4%) 8 (27.6%) | 15 (51.7%) 7 (24.1%) |
Type of surgery [n (%)] | Â | Â | Â |
 Osteosynthesis  Arthroplasty |  | 10 (35.7%) 18 (64.4%) | 13 (44.8%) 16 (55.2%) |
Operative time (min) |  | 73.4 ± 20.6 | 79.8 ± 15.6 |