Neutrophil percentage-to-albumin ratio for preoperative risk stratification of complicated appendicitis in children: a retrospective study

NPAR shows promise as a readily accessible biomarker derived from routine blood tests for risk stratification of complicated appendicitis in pediatric patients. The identified non-linear association pattern provides valuable insights for clinical risk assessment. Internal validation confirmed the stability of our model, and these findings warrant further validation in prospective multicenter studies before broad clinical implementation.