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Table 4 Independent predictors of ICU mortality by multivariate logistic regression analysis in all patients (appending models summary)a

From: Relationship between thyroid function and ICU mortality: a prospective observation study

Predictor Standard β value OR P value -2 log-likelihood Cox & Snell R2 Nagelkerke R2
Model I APACHE II score 1.355 3.877 0.000 315.784 0.186 0.301
Model II       
   FT3 -0.741 0.477 0.000 295.291 0.225 0.364
   APACHE II score 1.119 3.062 0.000    
Final model       
   FT3 -0.600 0.549 0.001    
   APACHE II score 0.912 2.490 0.000    
   Log(NT-proBNP) 0.459 1.582 0.017 282.968 0.248 0.401
   Log(CRP) 0.367 1.443 0.030    
  1. aAPACHE II score, Acute Physiology and Chronic Health Evaluation II score; eGFR, estimated glomerular filtration rate; FT3, free triiodothyronine; FT4, free thyroxine; NT-proBNP, N-terminal pro-brain natriuretic peptide; rT3 = reverse triiodothyronine; T3 = triiodothyronine; T4 = thyroxine; TSH = thyroid-stimulating hormone; TT3 = total triiodothyronine; TT4 = total thyroxine; T3/rT3 = ratio of rT3 to T3. Standard β value was calculated using the semistandardization method (X standardization). Odds ratios are shown as standardized OR per 1 SD. Log variable is the logarithm of the variable. Independent variables in the multivariate analysis included TT3, TT4, FT3, FT4, rT3, TSH, T3/rT3, Log(NT-proBNP), Log(CRP), APACHE II score and albumin (and age, eGFR and hemoglobin). Variables not listed in the table were removed from the stepwise analysis.