Cardiac troponin I levels measured with a high-sensitive assay increase over time and are strong predictors of mortality in an elderly population
2013 (English)In: Journal of the American College of Cardiology, ISSN 0735-1097, E-ISSN 1558-3597, Vol. 61, no 18, 1906-1913 p.Article in journal (Refereed) Published
Cardiac troponin levels are often detectable in community-dwellers when sensitive assays are applied. However, information on the course of troponin levels over time is limited.
We assessed changes in troponin levels, underlying conditions and the prognostic implications thereof in elderly subjects from the community.
Cardiac troponin I (cTnI) was measured using a novel high-sensitive assay from Abbott Laboratories in community-dwellers aged 70 years (PIVUS study). Measurements were performed at baseline (n=1004) and after 5 years (n=814). Total follow-up was 8.0 years.
cTnI levels were detectable in 968 (96.4%) subjects at baseline, and independently predicted all-cause mortality (adjusted HR 1.44 [95% CI 1.18-1.77]) and cardiovascular mortality (adjusted HR 1.66 [95% CI 1.20-2.29]) when levels from baseline and 5-year follow-up were used as updated covariates. The integrated discrimination improvement of cTnI regarding all-cause mortality was 0.014 (p=0.04) and the category-free net reclassification improvement was 0.231 (p=0.02). Median cTnI levels increased by 45% between both measurements. The change in cTnI levels was significantly related to male sex (p=0.02), body mass index (p=0.01), HDL-cholesterol (p=0.005), N-terminal pro B-type natriuretic peptide (p=0.004) and the left-ventricular ejection fraction (p=0.04), and independently predicted all-cause mortality occurring after 5-year follow-up (adjusted HR 1.97 [1.14-3.40]; p=0.02).
Using a novel high-sensitive assay, cTnI levels could be determined in nearly all elderly subjects. cTnI levels increased over time and were a strong marker of mortality risk. Our data suggest that cTnI might offer utility for clinical assessment of subjects in the general population.
Place, publisher, year, edition, pages
2013. Vol. 61, no 18, 1906-1913 p.
Cardiac and Cardiovascular Systems
IdentifiersURN: urn:nbn:se:uu:diva-198201DOI: 10.1016/j.jacc.2012.12.048ISI: 000318607400011PubMedID: 23500239OAI: oai:DiVA.org:uu-198201DiVA: diva2:615421