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With a cutoff PAS of 3 or lower, there were no patients diagnosed with acute appendicitis; hence, these patients could be discharged without any image studies. If all the patients with a PAS of 8 or higher undergo surgery, we would find in our sample a 4.95% rate of negative appendicectomy, less than other studies have shown. The application of this score in the emergency department could help in the decision making process, aiding in the identification of patients with a low risk of having appendicitis and enabling a better use of resources by avoiding unnecessary diagnostic tests.

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