Converting Incidence and Prevalence Data: An Update to the Rule

Abstract

l e t t e r s t o t h e e d i t o r table 1. Parameters Used for the Conversion of Healthcare-Associated (HCA) Urinary Tract Infection (UTI) Incidence and Prevalence Parameter definition Formula parameter Value Prevalence P 3.2% a Incidence I 1.9 b Mean length of stay for patients with HCA UTI LN 31 days Mean interval between admission and HCA UTI onset INT 11 days Mean length of stay for all patients LA 5 days Minimum local antibiotic course duration for HCA UTI … 7 days Maximum local antibiotic course duration for HCA UTI … 14 days a Derived from a local point prevalence survey. b Derived from an automated surveillance tool based on laboratory-confirmed cases and local administrative hospital data.