Indian journal of pediatrics · 2026
A Prospective Model for Detecting Missed Appendicitis in Low-Risk Pediatric Patients.
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Zouari Mohamed, Belhajmansour Manel, Laadhar Mahmoud, Tounsi Mohamed Karim, Hbaieb Manar, Jarboui Oumaima, Dhaou Mahdi Ben, Mhiri Riadh
Аннотация
OBJECTIVES: To identify predictors of true appendicitis among children with a Pediatric Appendicitis Score (PAS) <4 and to develop a model for detecting missed appendicitis in this low-risk population.
METHODS: A prospective study including consecutive children aged 2-14 y presenting with suspected appendicitis was conducted between January 2022 and October 2025. Only children with PAS <4 were included in the analysis.
RESULTS: Among 1174 children evaluated, 404 (34.4%) had PAS <4 and were included. Of these, 39 (9.6%) had confirmed appendicitis. The mean age of this cohort was 9.8 ± 2.6 y, and males accounted for 48.5% of the population. Compared with non-appendicitis cases, affected children had higher rates of vomiting (61.5% vs. 40.3%, p = 0.011), higher median WBC counts (8.8 vs. 7.7 × 10⁹/L, p = 0.001), and higher CRP levels (17 vs. 5 mg/L, p = 0.001). On multivariable analysis, WBC >8.8 × 10⁹/L (OR 2.77; p = 0.012), CRP ≥10 mg/L (OR 3.17; p = 0.005), and positive ultrasound (OR 17.36; p <0.001) were independent predictors. Ultrasound showed the highest diagnostic accuracy (85%) and negative predictive value (97%).
CONCLUSIONS: Nearly 10% of children with PAS <4 had confirmed appendicitis. Combining inflammatory markers with targeted ultrasound may improve early detection of missed appendicitis in low-risk pediatric patients.
METHODS: A prospective study including consecutive children aged 2-14 y presenting with suspected appendicitis was conducted between January 2022 and October 2025. Only children with PAS <4 were included in the analysis.
RESULTS: Among 1174 children evaluated, 404 (34.4%) had PAS <4 and were included. Of these, 39 (9.6%) had confirmed appendicitis. The mean age of this cohort was 9.8 ± 2.6 y, and males accounted for 48.5% of the population. Compared with non-appendicitis cases, affected children had higher rates of vomiting (61.5% vs. 40.3%, p = 0.011), higher median WBC counts (8.8 vs. 7.7 × 10⁹/L, p = 0.001), and higher CRP levels (17 vs. 5 mg/L, p = 0.001). On multivariable analysis, WBC >8.8 × 10⁹/L (OR 2.77; p = 0.012), CRP ≥10 mg/L (OR 3.17; p = 0.005), and positive ultrasound (OR 17.36; p <0.001) were independent predictors. Ultrasound showed the highest diagnostic accuracy (85%) and negative predictive value (97%).
CONCLUSIONS: Nearly 10% of children with PAS <4 had confirmed appendicitis. Combining inflammatory markers with targeted ultrasound may improve early detection of missed appendicitis in low-risk pediatric patients.