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Demographic data for patients.
| Characteristic | IP technique (n = 25) |
OP technique (n = 21) |
|---|---|---|
| Age, years (SD) | 56.23 (10.30) | 58.17 (9.62) |
| Sex M/F, n | 16/9 | 13/8 |
| Weight, kilograms (SD) | 58.76 (8.31) | 59.82 (7.20) |
| Height, meters (SD) | 1.64 (0.05) | 1.67 (0.04) |
| Body mass index, kg/m2 (SD) | 21.70 (2.78) | 21.14 (2.34) |
| Left/right, n | 15/10 | 14/7 |
| Spinal level of injection | ||
| L4, n (%) | 14 (56.0) | 12 (57.1) |
| L5, n (%) | 11 (44.0) | 9 (42.9) |
| VAS (SD) before injection | 7.26 (1.00) | 7.34 (1.08) |
