|
| N2O group | Control group | P value |
| Age (years) | 59 ± 12 | 55 ± 15 | 0.64 |
| Gender (male/femal) | 4/6 | 3/9 | 0.65 |
| Height (cm) | 157 ± 13 | 159 ± 12 | 0.63 |
| Weight (kg) | 56 ± 14 | 58 ± 12 | 0.65 |
| ASA (grade1/2) | 4/6 | 3/9 | 0.65 |