Clinical Prediction Scores for Pediatric Appendicitis.

Area of Science:

• Pediatric Surgery
• Diagnostic Accuracy
• Clinical Decision Support

Background:

• Misdiagnosis of appendicitis in children presents a significant clinical challenge.
• Existing scores like Pediatric Appendicitis Score (PAS) and Alvarado score demonstrate suboptimal diagnostic accuracy in pediatric populations.
• The Appendicitis Inflammatory Response (AIR) score and pediatric Appendicitis Risk Calculator (pARC) require further validation for pediatric appendicitis diagnosis.

Purpose of the Study:

• To prospectively evaluate and compare the diagnostic performance of four clinical prediction scores for suspected appendicitis in children.
• To assess the accuracy of the Pediatric Appendicitis Score (PAS), Alvarado score, Appendicitis Inflammatory Response (AIR) score, and pediatric Appendicitis Risk Calculator (pARC) in a pediatric cohort.

Main Methods:

• A prospective study included 318 children under 15 years with suspected appendicitis over a 2-year period.
• Four prediction scores (PAS, Alvarado, AIR, pARC) were calculated for each patient.
• Comparative analysis included predictive values, receiver operating characteristic (ROC) curves, decision curve analysis, and clinical outcomes.

Main Results:

• The AIR score and pARC demonstrated significantly higher specificity and positive predictive value, with fewer false positives (7% and 2%) compared to PAS and Alvarado scores (36% and 28%).
• No significant differences were observed in sensitivity, negative predictive values, or missed appendicitis rates across the scores.
• Decision curve analysis indicated that AIR score and pARC outperformed PAS and Alvarado score across most threshold probabilities.

Conclusions:

• The AIR score and pARC are more effective than PAS and Alvarado score for diagnosing appendicitis in children.
• These validated scores offer improved diagnostic accuracy and reduced false positives in pediatric appendicitis cases.