Table 1 Baseline characteristics of the patients by group
Parameters | All patients (N = 89) | PaO2/FiO2 ≥ 300 (NORM = 69) | PaO2/FiO2 < 300 (PPI = 20) | p-value* |
|---|---|---|---|---|
Age (years) | 58 (49.5–65.5) | 56 (47–67) | 71 (63–74) | 0.001 |
Male, N (%) | 42 (47.2) | 33 (47.82) | 9 (45) | 0.803 |
Smoker, N (%) | 22 (24.72) | 14 (20.29) | 8 (40) | 0.132 |
NYHA 3, N (%) | 15 (16.85) | 4 (5.8) | 11 (55) | < 0.001 |
ASA 3, N (%) | 18 (20.22) | 10 (14.49) | 8 (40) | 0.029 |
Hemoglobin level (g/L) | 130.45 ± 15.76 | 132 ± 15 | 125 ± 16 | 0.069 |
Albumin level (g/L) | 41.25 ± 4.67 | 42.10 ± 3.85 | 38.31 ± 6.03 | 0.001 |
Serum creatinine level (umol/L) | 64 (54–74.5) | 62 (54–75) | 67.4 (54–71.5) | 0.898 |
Urea nitrogen level (mmol/L) | 5.05 ± 1.45 | 5.04 ± 1.5 | 5.11 ± 1.28 | 0.842 |
Body mass index (kg/m2) | 22.73 ± 2.71 | 22.92 ± 2.73 | 22.06 ± 2.71 | 0.21 |