Open AccessBiological Variation and Reference Change Value Data for Serum Neuron‐Specific Enolase in a Turkish Population
Author(s) -
Matyar Selcuk,
Goruroglu Ozturk Ozlem,
Ziyanoglu Karacor Esin,
Yuzbasioglu Ariyurek Sedefgul,
Sahin Gulhan,
Kibar Filiz,
Yaman Akgun,
Inal Tamer
Publication year - 2016
Publication title -
journal of clinical laboratory analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 50
eISSN - 1098-2825
pISSN - 0887-8013
DOI - 10.1002/jcla.21984
Subject(s) - enolase , turkish population , medicine , biomarker , reference range , coefficient of variation , population , statistics , biology , genotype , mathematics , biochemistry , immunohistochemistry , environmental health , gene
Background Neuron‐specific enolase (NSE) is a recognized biomarker for the assessment of cerebral injury in neurological disorders. This study aims to report a definitive assessment of the biological variation (BV) components of this biomarker, including within‐subject BV (CVI), between‐subject BV (CVG), index of individuality (II), and reference change value (RCV), in a cohort of Turkish participants using an experimental protocol. Methods Six blood specimens were collected from each of the 13 apparently healthy volunteers (seven women, six men; ranging in age from 23 to 36) on the same day, every 2 weeks for 2 months. Serum specimens were stored at −20°C until analysis. Neuron‐specific enolase levels were evaluated in serum samples using an electrochemiluminescence (ECLIA) immunoassay kit with a Roche Cobas e 411 auto‐analyser. ANOVA test was used to calculate the variations. Results The CVI and CVG for NSE were 21.5% and 28.8%, respectively. Analytical variation (CVA) was calculated as 10.2%. Additionally, II and RCV were calculated as 0.74 and 66% (95% confident interval, CI), respectively. Conclusion As the performance index (PI) was found to be less than 2 (PI = 0.95), it is concluded that the NSE measurements have a desirable performance for analytical imprecision. Since the II was found to be less than 1 (II: 0.74), the reference values will be of little use. Thus, RCV would provide better information for deciding whether a significant change has occurred.