Analysis of predictive factors for perforated appendicitis in children.

Longer symptom duration (≥2 days), fever (axillary temperature ≥38.0 °C), elevated C-reactive protein level, and the presence of appendiceal fecalith and ascites on imaging are independent and objective factors predicting perforated appendicitis at admission. These risk factors have the potential to be helpful as an ancillary index for physicians determining the severity of appendicitis.