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Table 3 Multiple logistic regression with backward elimination

From: Which variables are associated with blood glucose levels outside the target range in surgical critically ill patients? A retrospective observational study

  BG < 80 vs 80 ≤ BG < 150 BG ≥ 150 vs 80 ≤ BG < 150
  OR (95% CI) P value OR (95% CI) P value
Age (per year) 1.02 (1.01; 1.03) <0.001 1.01 (1.01; 1.02) <0.001
Gender (female vs male) --   --  
Neurosurgery --   1.0 <0.001
Abdominal surgery    0.6 (0.5; 0.7)  
Vascular surgery    0.7 (0.6; 0.9)  
Trauma surgery    0.6 (0.5; 0.8)  
SAPS II (>36 vs ≤36) --   --  
Sepsis 1992 severe/shock (yes vs no) --   1.2 (1.1; 1.4) 0.003
Sepsis 2003 severe/shock (yes vs no) --   --  
Extracorporeal renal replacement therapy (yes vs no) --   --  
MELD (>9 vs ≤9) --   --  
SOFA (>4 vs ≤4) --   --  
Adrenaline (yes vs no) --   --  
Noradrenaline (yes vs no) 1.4 (1.2; 1.8) <0.001 1.4 (1.2; 1.6) <0.001
Steroids (yes vs no) 1.3 (1.003; 1.7) 0.047 1.4 (1.2; 1.7) <0.001
Insulin 2.1 (1.7; 2.6) <0.001 2.4 (2.0; 2.7) <0.001
  1. OR (95% CI) of factors associated with blood glucose concentrations < 80 mg/dl or ≥ 150 mg/dl.
  2. BG = blood glucose; CI = confidence interval; IIT = intensive insulin therapy; MELD = model of end stage liver disease; OR = odds ratio; SAPS II = Simplified Acute Physiology Score; SOFA = Sequential Organ Failure Assessment.
  3. Number of data sets: see Table 1.
  4. To convert the values for glucose to millimoles per litre, multiply by 0.05551.
  5. For comparison with the other types of surgery, the risk has been set at 1 for neurosurgery.