Comparison of ANN and LR in Training Set, % (N = 927).

aMean±SE,bcomparison with same variables set,ccomparison with ANN model,dcomparison with LR model.Group 1: all variables.Group 2: high odds ratio variables (Foley, nasogastric tube and steroids).Group 3: medical devices as variables (Foley, CVC catheter, arterial line and nasogastric tube).Group 4: low odds ratio variables (CVC catheter, arterial line and stress ulcer prophylaxes).Group 5: underlying condition and medications as variables (hemodialysis, stress ulcer prophylaxes and steroids).Abbreviations: ANN = artificial neural network, LR = logistic regression, Sens. = sensitivity, Spec. = specificity, PPV = positive predictive value, NPV = negative predictive value, AUC = area under the receiver operating characteristic curve.