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Table 9 Results for sensitivity analyses of model performance in the new model for 90-day hospital mortality and 90-day ICU mortality

From: Risk factors for and prediction of mortality in critically ill medical–surgical patients receiving heparin thromboprophylaxis

Model performance Goodness-of-fit C index SMR (95 % CI)
p valuea AIC
Hospital mortality in derivation set (n = 1891)b 0.40 5521 0.63 1.006 (0.962–1.053)
Hospital mortality in validation set (n = 1855)b 0.62 5787 0.64 1.008 (0.963–1.055)
ICU mortality in the whole set (n = 3746)c 0.78 8144 0.63 1.004 (0.972–1.037)
  1. AIC Akaike information criterion, SMR standardized mortality ratio
  2. aBased on Groennesby and Borgan test
  3. bThe new model for 90-day hospital mortality included BMI, medical admission, inotropes or vasopressors, acetylsalicylic acid or clopidogrel, APACHE II score and the interaction between BMI and APACHE II score
  4. cThe new model for 90-day ICU mortality consisted of BMI, medical admission, invasive mechanical ventilation and APACHE II score