True 99th centile of high sensitivity cardiac troponin for hospital patients: prospective, observational cohort study.

Objective: To determine the distribution, and specifically the true 99th centile, of high sensitivity cardiac troponin I (hs-cTnI) for a whole hospital population by applying the hs-cTnI assay currently used routinely at a large teaching hospital.

Design: Prospective, observational cohort study.

Setting: University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom, between 29 June 2017 and 24 August 2017.