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