Clinical information of study cohorts
This study included 78 PP and 78 non-PP groups, respectively. Among the PP group, 79.5% were male, and the BMI was significantly higher [25.0 (22.7, 27.4) vs 22.5 (20.8, 25.4), p=0.002]. Additionally, the PP group exhibited higher levels of PEEP, Respiratory Rate, and Peak airway pressure [8.5 (6.3, 10.0) vs 5.0 (5.0, 7.0);16.0 (15.0, 20.0)vs 15.0 (15.0, 15.0);23.0 (18.3, 26.0) vs 20.0 (16.0, 24.0), all p < 0.05]. In the PP group, 38.5% of patients had Pre-existing pulmonary disease. Furthermore, 84.1% of patients exhibited gross glassy/patchy changes in the lungs. The oxygenation index was found to be lower in the PP group compared to the non-PP group [125.5 (104.3, 169.0) vs 212.5 (130.5, 289.5), p<0.001],and the FiO2 levels were higher [60.0 (45.8, 80.0) vs 50.0 (40.0, 61.0), p=0.003]. (Table 1, Fig.S1)
Table 1 Comparison of baseline data between PP group and Non-PP group patients.