Evaluation of 99th percentile and reference change values of the hs-cTnI method using ADVIA Centaur XPT platform: A multicenter study

Cinzia Carrozza, Aldo Clerico, Silvia Masotti, Veronica Musetti, Andrea Ripoli, Rosalia Aloe, Martina Di Pietro, Sara Rizzardi, Ruggero Dittadi, Lucia Belloni, Marco Perrone, Tommaso Fasano, Simone Canovi, Antonio De Santis, Concetta Prontera, Cristina Guiotto, Domenico Cosseddu, Marco Migliardi, Sergio Bernardini

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16 Citations (Scopus)


Background: According to quality specifications required by international guidelines, the evaluation of the 99th URL value is a very difficult task that is usually beyond the capacity of a single laboratory. The aims of this article are to report and discuss the results of a multicenter study concerning the evaluation of the 99th percentile URL and reference change (RCV) of the ADVIA Centaur High-Sensitivity Troponin I (TNIH), recently distributed to the Italian clinical laboratories. Materials and methods: The reference population evaluated with ADVIA XPT method for the calculation of cTnI reference distribution parameters consisted of 1325 healthy adults subjects (age range from 18 to 86 years), including 653 women (mean age 50.7 years, SD 14.5 years) and 672 men (mean age 50.9 years, SD 13.8 years), well matched for both age (P =.8112) and sex (F/M = 0.97). Results: cTnI distribution values of reference population was highly skewed, while log-transformed cTnI values roughly approximated a log-normal distribution. Men have higher cTnI values than women throughout all the adult lifespan. Moreover, the subjects with age ≤ 55 years had significantly lower cTnI values than those with age > 55 years (p <.0001). Of note, 62% of women and 77% of men had equal or higher than cTnI values than the LoD value of the method (i.e., 2.2 ng/L). Conclusions: The results of the present study demonstrate that the ADVIA Centaur High-Sensitivity Troponin I using the XPT automated platform fits both the criteria and quality specifications required by the most recent international guidelines for high-sensitivity methods for cTnI assay.
Original languageEnglish
Pages (from-to)161-166
Number of pages6
JournalClinica Chimica Acta
Publication statusPublished - 2019


  • Acute coronary syndrome
  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Blood Chemical Analysis
  • Cardiac troponins
  • Cardiovascular risk
  • Female
  • High-sensitivity method
  • Humans
  • Immunoassay
  • Male
  • Middle Aged
  • Myocardial injury
  • Myocardium
  • Reference Values
  • Reference changes values
  • Reference population
  • Troponin I
  • Young Adult

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