Absolute and Relative Distributions of Troponin I Concentrations in the Study Population.

The categories were defined as follows. For the contemporary-sensitivity assay, troponin category 1 is 0–1 pg/mL (lowest observed non-zero value), category 2 is 1–10 pg/mL (LOD), and category 3 is >10 pg/mL. For the high-sensitivity assay, troponin category 1 is 0–1.9 pg/mL (LOD), category 2 1.9–5.1 pg/mL (same percentile as 10 pg/mL for contemporary troponin), and category 3 is >5.1 pg/mL. For the super-sensitivity assay, troponin category 1 is 0–1.0 pg/mL (median limit of detection), category 2 1.0–5.1 pg/mL (according to the percentiles of contemporary troponin), and category 3 is >5.1 mg/mL.cs-cTnI = troponin I measured by contemporary-sensitivity assay, hs-cTnI = troponin I measured by high-sensitivity assay, ss-cTnI = troponin I measured by super-sensitivity assay, LOD = limit of detection.