Demographics and peripheral nerve block distribution among cohort
| N | 34 514 |
| Age in years, mean (SD) | 10.38 (5.23) |
| Weight in kg, mean (SD) | 44.88 (26.66) |
| Males (%) | 21 333 (61.8) |
| Bupivacaine equivalents mg kg−1, mean (SD) | 0.86 (0.50) |
| Ropivacaine (%) | 22 584 (65.4) |
| LA concentrations (%) | |
| 0.5 | 13 436 (28.9) |
| 0.2 | 8242 (23.9) |
| 0.25 | 8108 (23.4) |
| Block (%) | |
| Femoral | 8834 (25.6) |
| Ilioinguinal/iliohypogastric | 3851 (11.2) |
| TAP | 4831 (14.0) |
| Sciatic | 3222 (9.3) |
| Popliteal | 2807 (8.1) |
| Supraclavicular | 2716 (7.9) |
| Penile | 2660 (7.7) |
| Saphenous | 2358 (6.8) |
| Rectus sheath | 2275 (6.6) |
| Interscalene | 960 (2.8) |
LA, local anesthetic; TAP, transverse abdominis plane.