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Table 5 Final model

From: Preoperative risk factors including serum levels of potassium, sodium, and creatinine for early mortality after open abdominal surgery: a retrospective cohort study

  OR Estimate P-value
Intercept − 9.6827  < 0.0001
Creatinine (OR per 10 micromol/L) 1.08 (1.06; 1.10) 0.0076  < 0.0001
Hyperkalemia (N = 466) 1.56 (1.20; 2.03) 0.4446 0.001
Hypokalemia (N = 855) 1.44 (1.17; 1.78) 0.3650 0.0006
Hypernatremia (N = 140) 3.13 (2.08; 4.70) 1.1397  < 0.0001
Hyponatremia (N = 1364) 1.60 (1.32; 1.93) 0.4705  < 0.0001
Age (OR per 10 years) 1.76 (1.58; 1.96) 0.5640  < 0.0001
Male vs female 1.26 (1.04; 1.54) 0.2324 0.02
Acute vs eletive surgery 4.84 (3.58; 6.54) 1.5767  < 0.0001
I. Gastroduodenal (N = 362) 5.75 (3.15; 10.48) 1.7488  < 0.0001
III. Small bowel (N = 291) 3.37 (1.81; 6.27) 1.2143  < 0.0001
V. Colon (N = 1426) 4.36 (2.45; 7.75) 1.4724  < 0.0001
VI. Rectum (N = 496) 4.12 (2.14; 7.94) 1.4164  < 0.0001
VII. Herniotomy, adhesiolysis, splenectomy, and diagnostic purposes (N = 723) 3.94 (2.20; 7.07) 1.3708  < 0.0001
  1. Odds ratios and 95% confidence intervals for 30 day mortality, P-values and estimates from the logit function for the variables reaching significance after stepwise logistic regression analysis
  2. Biliary surgery (N = 214), Normokalemia (N = 2369) and Normonatremia (N = 2186) are used as reference for their respective groups