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Table 3 Comparison of characteristics among patients with/without AG data

From: Association between delta anion gap and hospital mortality for patients in cardiothoracic surgery recovery unit: a retrospective cohort study

Variables Patients with AG (N = 2860) Patients without AG (N = 4034) p value
Age (y) 67.9 ± 12.1 67.8 ± 12.0 0.734
Male, n (%) 1934 (67.6) 2694 (66.8) 0.464
White, n (%) 2261 (79.1) 3184 (78.9) 0.899
Body mass index, Kg/m2 28.8 ± 6.0 28.7 ± 5.7 0.483
SOFA 5 (3–7) 5 (3–6) 0.128
SAPSII 36.9 ± 12.5 36.4 ± 11.7 0.089
SIRS 3 (2–4) 3 (2–4) 0.532
Operation types, n (%)
 CABG 1283 (44.9) 1816 (43.8) 0.302
 Valve replacement or valvoplasty 621 (21.8) 958 (23.1)
 Resection of vessls 232 (8.1) 369 (8.9)
 Others 724 (25.2) 1004 (24.2)
Postoperative complications, n (%)
 AKF 392 (13.7) 544 (13.5) 0.792
 Acidosis 150 (5.2) 206 (5.1) 0.798
Arrhythmia 1188 (41.5) 1692 (41.9) 0.737
Acute respiratory failure 156 (5.5) 230 (5.7) 0.660
Pneumonia 28 (1.0) 48 (1.2) 0.409
Pulmonary embolism 20 (0.7) 36 (0.9) 0.379
Hospital mortality 19 (0.7) 35 (0.9) 0.295
ICU LOS, median (IQR), day 2.1 (1.3–3.4) 2.3 (1.3–3.6) 0.122
Hospital LOS, median (IQR), day 7.6 (5.8–11.3) 7.9 (5.9–11.5) 0.145
  1. SOFA sequential organ failure assessment, SAPSII simplified acute physiology score II, SIRS systemic inflammatory response syndrome, CABG coronary artery bypass graft, AKF acute kidney failure, ICU intensive care unit, LOS length of stay, IQR interquartile ranges