Table 1 Demographics, preoperative, and intraoperative data
|  | Proximal end (n = 30) | Middle (n = 30) |
|---|---|---|
Demographic data | ||
 Age (years), mean (SD) | 68.60 (6.20) | 67.47 (6.37) |
 Female Sex, n (%) | 26 (86.67%) | 25 (83.33%) |
 BMI (kg/m2), mean (SD) | 25.27 (3.50) | 25.80 (2.28) |
 ASA-PS class (I/II/III), n | 5/24/1 | 5/25/0 |
Preoperative data | ||
 NRS score at rest, median (IQR) | 0 (0–3) | 0 (0–3) |
 NRS score with activity, median (IQR) | 5 (3–6) | 5 (4–6) |
 Quadriceps strength score, median (IQR) | 5 (5–5) | 5 (5–5) |
 Time to complete the block and catheter insertion (sec), mean (SD) | 144.00 (69.86) | 136.37 (84.74) |
Intraoperative data | ||
 Operation duration (min), mean (SD) | 86.57 (28.71) | 93.73 (19.90) |
 Intraoperative fentanyl (μg/kg), mean (SD) | 3.32 (1.21) | 3.46 (1.20) |