Is it possible to predict the severity of acute appendicitis? Reliability of predictive models based on easily available blood variables.

"Declarations Ethics approval and consent to participate:Formal ethical committee approval was not deemed to be necessary due to the retrospective nature and anonymised nature of the audit. However, this audit was approved by the Audit Committee of the Oxford University Hospitals NHS Foundation Trust. Consent for publicationNot applicable. Competing interestsThe authors declare that they have no competing interests. All authors certify that they have no affiliations with or involvement in any organisation or entity with any financial or non-financial interest in the subject matter or materials discussed in this manuscript. Competing interests The authors declare that they have no competing interests. All authors certify that they have no affiliations with or involvement in any organisation or entity with any financial or non-financial interest in the subject matter or materials discussed in this manuscript."

"Funding No funding was available for this study."