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Performance of a novel high sensitivity cardiac troponin I assay in asymptomatic hemodialysis patients - evidence for sex-specific differences.
Clin. Chem. Lab. Med. 57, 1261-1270 (2019)
Background: High sensitivity assays for the determination of cardiac troponin I (cTnI) are able to reliably measure cTnI far below the 99th percentile of healthy persons (hs-cTnI) and display sex-specific differences. There is uncertainty regarding the clinical utility of hs-cTnI in asymptomatic hemodialysis (HD) patients and if sex-specific differences also apply in this cohort.Methods: In this multicenter study we measured hs-cTnI and sensitive cTnI (s-TnI) concentrations (both on Siemens Centaur) in 215 HD patients from a predialytic sample to determine the prevalence of elevated concentrations above the 99th percentile, the association with baseline characteristics, prognostic accuracy for death, and sex-specific differences.Results: Hs-cTnI and s-cTnI concentrations were below the 99th percentile in 93% and 85% of patients with a median concentration of 12 ng/L (interquartile range 7-66) and 19 ng/L (12; 31, p < 0.0001). Hs-cTnI and s-cTnI concentrations were independently associated with age (p < 0.05) and ischemic cardiac disease (p < 0.05), but not with residual renal function. Both hs-cTnI and s-cTnI were predictors of death after median follow-up of 2.6 years with an AUC of 0.733 and 0.744, respectively (both p < 0.0001). Important sex-differences emerged for hs-cTnI, but not for s-cTnI: first, women had significantly lower hs-cTnI concentrations than men (p = 0.03); second, hs-cTnI had significantly higher prognostic accuracy for death in women than for men (AUC 0.824 vs. 0.674, p = 0.04).Conclusions: The majority of HD patients have (h)s-cTnI concentrations below the 99th percentile. High normal values are predictive of death. Hs-cTnI allows to elucidate important sex-differences in HD patients with lower concentrations and higher prognostic accuracy in women.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Hemodialysis ; High Sensitivity ; Prognosis ; Sex-specific ; Troponin I; Acute Coronary Syndrome; Stage Renal-disease; Prognostic Value; Predictive-value; 99th Percentile; Biomarkers; Population; Fluid
ISSN (print) / ISBN
1434-6621
e-ISSN
1437-4331
Quellenangaben
Volume: 57,
Issue: 8,
Pages: 1261-1270
Publisher
de Gruyter
Publishing Place
Genthiner Strasse 13, D-10785 Berlin, Germany
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Reviewing status
Peer reviewed