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Onset and recovery times.
| Seated group | Supine group | ||
|---|---|---|---|
| Mean (SD) | Mean (SD) | P value | |
| Onset of sensory block (min) | 7.2 (1.6) | 7.6 (1.5) | .44 |
| Onset of motor block (min) | 6.4 (1.7) | 5.6 (1.8) | .11 |
| Two dermatomes regression (min) | 80 (28) | 76 (30) | .60 |
| Regression to L1 (min) | 176 (37) | 158 (31) | .09 |
| Regression to S1 (min) | 241 (50) | 230 (33) | .35 |
| Complete motor recovery (min) | 150 (48) | 159 (34) | .46 |
| First analgesic request | 106 (29) | 131 (42) | .02 |
