Table 1 Demographic and baseline data
|  | Intravenous group (n = 83) | Inhalation group (n = 84) | P-value |
|---|---|---|---|
Age, years | 66.0(59.0–70.0) | 61.0(57.0–67.0) | 0.018 |
Male/Female, n | 33/50 | 30/54 | 0.590 |
Weight, kg | 58.5(53.0–67.0) | 62.0(55.0-68.2) | 0.175 |
Height, cm | 160.0(155.0-165.0) | 160.0(156.0-165.0) | 0.410 |
BMI, kg/m2 | 22.9(20.9–26.1) | 24.0(22.2–25.8) | 0.116 |
Chronic disease, n (%) | |||
Respiratory diseases | 6(7.2%) | 2(2.4%) | 0.269 |
 Hypertension | 45(54.2%) | 46(54.8%) | 0.944 |
 Diabetes | 14(16.9%) | 11(13.1%) | 0.495 |
 Heart disease | 5(6.0%) | 4(4.8%) | 0.985 |
 Drinking, n (%) | 2(2.4%) | 4(4.8%) | 0.689 |
 Smoking, n (%) | 9(10.8%) | 6(7.1%) | 0.403 |
ASA, classification, n (%) | 0.368 | ||
 I | 1(1.2%) | 0(0%) |  |
 II | 65(78.3%) | 71(84.5%) |  |
 III | 17(20.5%) | 13(15.5%) |  |
Preoperative pulmonary function | 0.888 | ||
 Normal, n (%) | 59(71.1%) | 57(67.9%) |  |
 Mild, n (%) | 20(24.1%) | 23(27.4%) |  |
 Moderate to severe, n (%) | 4(4.8%) | 4(4.8%) |  |
 FVC, L | 2.79(2.27–3.32) | 2.71(2.22–3.43) | 0.930 |
 FEV1, % | 98.6(88.8–107) | 96.8(84.0-109.0) | 0.734 |
 FEV1/FVC, % | 79.0(73.9–83.7) | 79.6(72.0-84.3) | 0.973 |
 DLCO2, % | 84.1(75.8–95.7) | 84.8(77.0-92.6) | 0.846 |