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SpO2 changes at three time points.
| Control | 2 h | 4 h | p | |
|---|---|---|---|---|
| T0∗ | 99 (98, 100) | 100 (99, 100) | 99 (98, 100) | 0.194 |
| T1∗∗ | 100 (99, 100) | 100 (98, 100) | 99 (98, 100) | 0.302 |
| T2∗∗∗ | 100 (99, 100) | 100 (99, 100) | 100 (98, 100) | 0.479 |
Note: ∗just before intravenous anesthesia; ∗∗1 minute after injection of propofol; ∗∗∗5 minutes after injection of propofol.
