Risk stratisfication score introducted by Maden Samuel in 2002.
The Pediatric Appendicitis Score had a sensitivity of 1, speciificity of 0.92, positive predictive value of 0.96, and negative predictive value of 0.99
Scores of 4 or less are least likely to have acute appendicitis, while scores of 8 or more are most likely.
Pediatric Appendicits Score. Samuel, M. J Pedia Surg.37:877-888. 2002.