 This study evaluated the accuracy of the pediatric appendicitis scoring past method in distinguishing between nonspecific abdominal pain, NSAP, and appendicitis in children. It compared the past score with other diagnostic methods such as C-reactive protein, CRP, and appendix pathology. The results showed that the past questionnaire had a high accuracy in diagnosing appendicitis and differentiating it from NSAP and specific abdominal pain other than appendicitis. Additionally, the past questionnaire had a high sensitivity and specificity for detecting appendicitis. Furthermore, the past questionnaire combined with detailed clinical examination reduced the rate of negative appendectomies to less than 1%. This article was authored by Roya Raisi, Mona Ajiji, Jalaluddin Amiri, and others.