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At the time the article was created Craig Hacking had no recorded disclosures.View Craig Hacking's current disclosures
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The APPEND score is a clinical decision rule and predictor of the likelihood of acute appendicitis.
Each of the following are worth 1 point 1:
elevated CRP >15mg/L
APPEND refers to the mnemonic:
P: pain (migratory)
P: peritonism (localized)
E: elevated CRP
D: dude (male)
0-1: low risk of acute appendicitis
2-4: intermediate risk of acute appendicitis
5-6: high risk of acute appendicitis
For a score of 1 (low risk of acute appendicitis), the NPV is 95.6% 2.
For a score of 5 (high risk of acute appendicitis), the PPV is 95.5% 2.
- 1. Mikaere H, Zeng I, Lauti M, Kularatna M, MacCormick A. Derivation and Validation of the APPEND Score: An Acute Appendicitis Clinical Prediction Rule. ANZ J Surg. 2018;88(4):E303-7. doi:10.1111/ans.14022 - Pubmed
- 2. Kularatna M, Chung L, Devathasan J, Coomarasamy C, McCall J, MacCormick A. Prospective Validation of the APPEND Clinical Prediction Rule for Appendicitis: A Cohort Study. J Surg Res. 2020;248:144-52. doi:10.1016/j.jss.2019.11.022 - Pubmed