Baseline characteristics
The incidence of postoperative severe ALI was 27.5% in this study, which included 404 male (84.3%) and 75 female patients (15.7%), with a mean age of 51.96 ± 10.75 years. Postoperative non-severe and severe ALI groups contained 347 and 132 patients, respectively. Surprisingly, patients in the postoperative non-severe ALI group appeared to be older than those in the postoperative severe ALI group (52.48 ± 10.77 versus 50.61 ± 10.61, respectively; P = 0.089); however, the difference was not statistically significant. In the postoperative severe ALI group, more patients were obese, and more patients had hypertension and coronary heart disease (CHD) compared to the non-severe ALI group (Table 1).
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