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Table 3 Postoperative data of stratified by BMI categories

From: Association of body mass index with in-hospital major adverse outcomes in acute type A aortic dissection patients in Fujian Province, China: a retrospective study

Variables normal group
18.5–23.9 kg/m2 (N = 248)
overweight group 24–27.9 kg/m2 (N = 408) obesity group ≥28 kg/m2 (N = 121) P-value
Postoperative
 Duration of ICU stays (d), median (IQR) 8.1 (7.1,9.2) 9.5 (8.6,10.5) 12.0 (10.0,14.1) 0.001a
 Duration of hospital stays (d), median (IQR) 21.0 (19.8,22.2) 22.6 (21.3,23.9) 27.4 (24.3,30.5) < 0.001a
 In-hospital mortality, n (%) 42 (16.9) 89 (21.8) 29 (24.0) 0.198b
 Stroke, n (%) 15 (6.0) 22 (5.4) 9 (7.4) 0.700b
 Myocardial infarction, n (%) 7 (2.8) 7 (1.7) 6 (5.0) 0.135b
 Low cardiac output syndrome, n (%) 2 (0.8) 3 (0.7) 2 (1.7) 0.632c
 Arrhythmia, n (%) 3 (1.2) 14 (3.4) 3 (2.5) 0.219c
 Aortic dissection rupture, n (%) 3 (1.2) 5 (1.2) 0 0.474c
 Respiratory insufficiency, n (%) 3 (1.2) 6 (1.5) 0 0.412c
 Acute renal failure, n (%) 46 (18.5) 105 (25.7) 30 (24.8) 0.098b
 Gastrointestinal bleeding, n (%) 17 (6.9) 41 (10.0) 12 (9.9) 0.356b
 Deep sternal wound infection, n (%) 3 (1.2) 4 (1.0) 4 (3.3) 0.155c
 Septicemia, n (%) 1 (0.4) 0 1 (0.8) 0.249c
 Postoperative bleeding, n (%) 2 (0.8) 2 (0.5) 4 (3.3) 0.024c
 Prolonged MV (>  48 h), n (%) 111 (44.8) 227 (55.6) 80 (66.1) < 0.001b
 In-hospital major adverse outcomes, n (%) 156 (62.9) 294 (72.1) 94 (77.7) 0.006b
  1. aKruskal-Wallis tests, bChi-square test; cFisher’s exact test; BMI body mass index, ICU intensive care unit, MV mechanical ventilation, IQR interquartile range