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| Secondary outcome measure | Mean difference (95% confidence interval) | P value |
| Time to first awakening | 4.6 (0.7 to 8.6) | 0.097 |
| Recall | 6.3% (‐6.1% to 18.6%) | 0.309 |
| Hypoxia | 3.1% (‐9.9% to 16%) | 0.69 |
| Hypotension | 2.6% (‐4.8% to 10.1%) | 0.442 |
