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The Paediatric Appendicitis Score (PAS) was useful in children with acute abdominal pain
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R D Goldman
Dr R D Goldman, University of British Columbia, Vancouver, British Columbia, Canada; rgoldman@cw.bc.ca
STUDY QUESTION
In children presenting to the emergency department (ED) with abdominal pain, does the Paediatric Appendicitis Score (PAS) accurately identify those with and without appendicitis?
STUDY DESIGN
prospective cohort study to validate a previously derived clinical prediction score.
tertiary paediatric ED in Toronto, Ontario, Canada.
849 children 1–17 years of age who presented to the ED with abdominal pain of <7 days duration. Children with ultrasonographic or computed tomographic diagnosis of appendicitis or previous appendectomy were excluded.
the PAS (range 0–10) assigns 1 point (unless otherwise noted) for each component present: Migration of pain, Anorexia, Nausea/vomiting, right-lower-quadrant Tenderness (2 points), Cough/percussion/hopping tenderness (2 points), Elevated temperature (fever >38°C), Leucocytosis >10 000 cells/mm3, and polymorphonuclear neutrophilia >7500 cells/mm3.* The original derivation study of the PAS determined that scores 
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Alfred I duPont Hospital for Children, Wilmington, Delaware, USA
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