Table 1 Demographic characteristics and perioperative data
Air group | N2O group | P value | |
|---|---|---|---|
Number of patients | 65 | 71 | |
Male, N (%) | 42 (64.6) | 46 (64.8) | 0.983 |
Age (months) | 43.6 ± 14.4 | 43.5 ± 13.0 | 0.827 |
Weight (kg) | 15.7 ± 4.1 | 16.1 ± 3.7 | 0.381 |
Height (cm) | 97.3 ± 10.7 | 97.6 ± 10.7 | 0.789 |
Duration of surgery (min) | 167.5 ± 37.1 | 172.4 ± 35.5 | 0.265 |
Duration of anesthesia (min) | 233.6 ± 38.8 | 230.9 ± 40.0 | 0.912 |
N2O inspiration concentration (%) | n.a. | 50 [50–50] | < 0.001 |
Cumulative N2O dose (N2O × time) | n.a. | 100.5 [84.0–112.5] | < 0.001 |
Length of stay (days) | 13.8 ± 4.2 | 13.6 ± 4.8 | 0.766 |
Preoperative red blood cell (1012/L) | 4.6 ± 0.4 | 4.6 ± 0.3 | 0.828 |
Preoperative hemoglobin (g/L) | 127.7 ± 9.1 | 126.7 ± 7.1 | 0.496 |
Preoperative white blood cell (109/L) | 7.0 ± 1.5 | 7.0 ± 1.4 | 0.945 |
Preoperative platelet (109/L) | 314.3 ± 73.3 | 293.9 ± 68.7 | 0.094 |