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Reference values for 34 frequently used laboratory tests in 80-year-old men and women
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Biochemial structure and function.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Biochemial structure and function.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Cardiovascular epidemiology.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Biochemial structure and function.ORCID iD: 0000-0003-3161-0402
2016 (English)In: Maturitas, ISSN 0378-5122, E-ISSN 1873-4111, Vol. 92, 97-101 p.Article in journal (Refereed) Published
Abstract [en]

OBJECTIVES: Reference values are usually based on blood samples from healthy individuals in the age range 20-50 years. Most patients seeking health care are older than this reference population. Many reference intervals are age dependent and there is thus a need to have appropriate reference intervals also for elderly individuals.

METHODS: We analyzed a group of frequently used laboratory tests in an 80-year-old population (n=531, 266 females and 265 males). The 2.5th and 97.5th percentiles for these markers were calculated according to the International Federation of Clinical Chemistry guidelines on the statistical treatment of reference values.

RESULTS: Reference values are reported for serum alanine transaminase (ALT), albumin, alkaline phosphatase, pancreatic amylase, apolipoprotein A1, apolipoprotein B, apolipoprotein B/apolipoprotein A1 ratio, aspartate aminotransferase (AST), AST/ALT ratio, bilirubin, calcium, calprotectin, cholesterol, HDL-cholesterol, creatinine kinase (CK), creatinine, creatinine estimated GFR, C-reactive protein, cystatin C, cystatin C estimated GFR, gamma-glutamyltransferase (GGT), iron, iron saturation, lactate dehydrogenase (LDH), magnesium, phosphate, transferrin, triglycerides, urate, urea, zinc, hemoglobin, platelet count and white blood cell count. The upper reference limit for creatinine and urea was significantly increased while the lower limit for iron and albumin was decreased in this elderly population in comparison with the population in the Nordic Reference Interval Project (NORIP).

CONCLUSIONS: Reference values calculated from the whole population and a subpopulation without cardiovascular disease showed strong concordance. Several of the reference interval limits were outside the 90% confidence interval of NORIP.

Place, publisher, year, edition, pages
2016. Vol. 92, 97-101 p.
National Category
Clinical Laboratory Medicine
Identifiers
URN: urn:nbn:se:uu:diva-303898DOI: 10.1016/j.maturitas.2016.07.015ISI: 000384787700016PubMedID: 27621245OAI: oai:DiVA.org:uu-303898DiVA: diva2:974523
Available from: 2016-09-26 Created: 2016-09-26 Last updated: 2017-11-21Bibliographically approved

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Helmersson, JohannaRidefelt, PeterLind, LarsLarsson, Anders

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