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Table 2 Preoperative, and operative 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 weight group
18.5–23.9 kg/m2 (N = 248)
overweight group 24–27.9 kg/m2 (N = 408) obese group ≥28 kg/m2 (N = 121) P-value
Preoperative
 Systolic BP (mm/Hg), mean (SD) 133.7 ± 27.4 143.6 ± 31.0 147.1 ± 27.9 < 0.001a
 Diastolic BP (mm/Hg), mean (SD) 71.9 ± 14.7 76.8 ± 17.8 78.1 ± 15.7 < 0.001a
 PP (mm/Hg), mean (SD) 61.7 ± 21.1 67.0 ± 23.5 69.0 ± 22.8 0.003a
 Heart rate, mean (SD) 80.7 ± 16.0 81.7 ± 17.3 83.6 ± 14.8 0.296a
 WBC (×109/l), mean (SD) 11.3 ± 3.8 12.9 ± 4.2 13.4 ± 4.4 < 0.001a
 Neutrophil (×  109/L), mean (IQR) 22.7 (19.0–26.4) 26.9 (23.8–30.0) 21.0 (16.4–25.6) 0.082b
 Lymphocyte (× 109/L), median (IQR) 2.6 (2.0–3.1) 2.6 (2.2–3.0) 2.3 (1.4–3.1) 0.734b
 Platelet (× 109/L), median (IQR) 184.3 (174.7–194.0) 182.1 (175.4–188.9) 189.4 (178.6–200.2) 0.607b
 Creatinine (umol/L), median (IQR) 98.5 (92.0,105.0) 119.4 (108.7130.2) 99.8 (90.2109.4) 0.005b
 Hemoglobin(g/l), mean (SD) 122.9 ± 18.5 128.5 ± 19.4 136.1 ± 18.0 < 0.001a
 Serum albumin (g/dL), mean (SD) 3.5 ± 0.4 3.7 ± 0.6 3.8 ± 0.6 < 0.001a
 BUN (mmol/L), median (IQR) 7.0 (6.5–7.4) 8.5 (6.1–10.9) 7.1 (6.6–7.7) 0.506b
Operative
 Operating time (min), median (IQR) 320.4 (309.2–331.7) 318.5 (309.8–327.2) 334.2 (315.7–352.7) 0.251b
 CPB time (min), median (IQR) 168.9 (159.9–177.9) 162.8 (156.8–168.9) 172.9 (157.8–188.1) 0.288b
 Aortic cross-clamping time (min), median (IQR) 80.6 (73.5–87.8) 80.7 (75.7–85.7) 72.4 (64.7–80.0) 0.265b
  1. aAnalysis of Variance; bKruskal-Wallis tests; BMI body mass index, BP blood pressure, PP pulse pressure, WBC white blood cell, BUN blood urea nitrogen, CPB cardiopulmonary bypass, SD standard deviation, IQR interquartile range