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Table 3 Predictive performance of LR and RF models with 5-fold classification in identifying diagnosed appendicitis ED patients, NHAMCS 2005-2017

From: Prediction of acute appendicitis among patients with undifferentiated abdominal pain at emergency department

Models Sensitivity
(95% CI)
Specificity
(95% CI)
Threshold
(95% CI)
Accuracy
(95% CI)
AUC
(95% CI)
LR for adult
 Structured + Unstructured variables 0.73 (0.68-0.78) 0.68 (0.59-0.77) 0.12 (0.10-0.14) 0.96 (0.95-0.97) 0.78 (0.76-0.80)
 Structured variables 0.64 (0.54-0.74) 0.70 (0.60-0.80) 0.08 (0.06-0.10) 0.95 (0.93-0.97) 0.72 (0.69-0.75)
 Unstructured variables 0.69 (0.64-0.74) 0.67 (0.63-0.71) 0.05 (0.05-0.05) 0.93 (0.92-0.94) 0.72 (0.69-0.75)
LR for pediatric
 Structured + Unstructured variables 0.81 (0.74-0.88) 0.78 (0.73-0.83) 0.13 (0.09-0.17) 0.95 (0.93-0.97) 0.87 (0.83-0.91)
 Structured variables 0.83 (0.71-0.95) 0.71 (0.59-0.83) 0.11 (0.04-0.18) 0.94 (0.89-0.99) 0.84 (0.79-0.89)
 Unstructured variables 0.75 (0.70-0.80) 0.73 (0.61-0.85) 0.06 (0.04-0.08) 0.90 (0.83-0.97) 0.78 (0.72-0.84)
RF for adult
 Structured + Unstructured variables 0.67 (0.56-0.78) 0.71 (0.59-0.83) 0.13 (0.11-0.15) 0.97 (0.96-0.98) 0.75 (0.71-0.79)
 Structured variables 0.68 (0.59-0.77) 0.65 (0.58-0.72) 0.14 (0.13-0.15) 0.97 (0.97-0.97) 0.71 (0.65-0.77)
 Unstructured variables 0.65 (0.59-0.71) 0.63 (0.55-0.71) 0.11 (0.10-0.12) 0.96 (0.95-0.97) 0.68 (0.64-0.72)
RF for pediatric
 Structured + Unstructured variables 0.82 (0.73-0.91) 0.75 (0.69-0.81) 0.13 (0.12-0.14) 0.96 (0.96-0.96) 0.86 (0.84-0.88)
 Structured variables 0.81 (0.75-0.87) 0.72 (0.63-0.81) 0.15 (0.12-0.18) 0.96 (0.95-0.97) 0.84 (0.79-0.89)
 Unstructured variables 0.8 (0.71-0.89) 0.65 (0.59-0.71) 0.11 (0.09-0.13) 0.95 (0.94-0.96) 0.78 (0.76-0.80)