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Confidence intervals and power calculations for within-person biological variation: effect of analytical imprecision, number of replicates, number of samples, and number of individuals.
BACKGROUND Reliable estimates of within-person biological variation and reference change value are of great importance when interpreting test results, monitoring patients, and setting qualityExpand
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Weekly and 90-minute biological variations in cardiac troponin T and cardiac troponin I in hemodialysis patients and healthy controls.
BACKGROUND Myocardial infarction (MI) is diagnosed by the finding of a single cardiac troponin value above the 99th percentile and a significant time-dependent change in cardiac troponinExpand
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A checklist for critical appraisal of studies of biological variation
Abstract Data on biological variation are used for many purposes in laboratory medicine but concern exists over the validity of the data reported in some studies. A critical appraisal checklist hasExpand
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The Biological Variation Data Critical Appraisal Checklist: A Standard for Evaluating Studies on Biological Variation.
BACKGROUND Concern has been raised about the quality of available biological variation (BV) estimates and the effect of their application in clinical practice. A European Federation of ClinicalExpand
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Biological Variation: The Effect of Different Distributions on Estimated Within-Person Variation and Reference Change Values.
BACKGROUND Good estimates of within-person biological variation, CVI, are essential for diagnosing and monitoring patients and for setting analytical performance specifications. The aim of theExpand
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Sample collections from healthy volunteers for biological variation estimates’ update: a new project undertaken by the Working Group on Biological Variation established by the European Federation of
Abstract Background: Biological variation (BV) data have many fundamental applications in laboratory medicine. At the 1st Strategic Conference of the European Federation of Clinical Chemistry andExpand
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Sickness absence with musculoskeletal or mental diagnoses, transition into disability pension and all-cause mortality: A 9-year prospective cohort study
Aims: Increased early mortality indicates poor health. This study assessed mortality among men and women after long-term sickness absence (LTSA) with musculoskeletal or mental diagnoses. A specialExpand
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A systematic review of data on biological variation for alanine aminotransferase, aspartate aminotransferase and γ-glutamyl transferase
Abstract Background: Alanine aminotransferase (ALT), aspartate aminotransferase (AST) and γ-glutamyl transferase (GGT) are enzymes measured in serum or plasma to investigate liver disease. The aim ofExpand
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Biological variation – reliable data is essential
Biological variation (BV) data is a cornerstone in the interpretation of laboratory test results, being the basis for many of the decisions we make every day both in the laboratory and in clinicalExpand
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The prevalence of self-monitoring of blood glucose and costs of glucometer strips in a nationwide cohort.
OBJECTIVE This study used nationwide data to determine the prevalence of self-monitoring of blood glucose (SMBG) among all non-institutionalized persons living in Norway and to estimate theExpand
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