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Measuring counted fractions in healthcare
RISE - Research Institutes of Sweden, Säkerhet och transport, Mätteknik.ORCID-id: 0000-0003-4349-500x
RISE - Research Institutes of Sweden, Säkerhet och transport, Mätteknik.ORCID-id: 0000-0002-3700-3921
2019 (engelsk)Inngår i: TMQ Techniques, Methodologies and Quality, ISSN 2183-0940, nr NÚMERO ESPECIAL, s. 60-69Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In establishing metrological quality assurance in healthcare, one major hurdle is the correct treatment ofordinal data typical of questionnaires, performance tests and other categorical data collected widely in care.Despite being known well over a century, there are still many examples of measurements in healthcare – forexample, (i) on-line tables of percentage performance indicators (e.g. fraction of patients seeing a doctorwithin seven days) and (ii) correlation plots for Alzheimer sufferers of cognitive scores against biomarkerconcentration – where the ‘counted fraction’ distortion of scales is not compensated for. The Rasch form ofgeneralised linear model not only handles counted fraction ordinality but also enables separation of objectand instrument attributes (such as task difficulty and patient ability) essential for metrological restitutionin measurement systems in healthcare. A perspective is given of a new kind of certified reference materialemploying causal Rasch models in terms of construct specification equations for metrological item bankingin the social sciences. This is part of the response to a recent call for: ‘a new international body to bringtogether metrology, psychometrics, philosophy, and clinical management to support the global comparabilityand equivalence of measurement results in patient centred outcome measurement to improve healthcare’.

sted, utgiver, år, opplag, sider
2019. nr NÚMERO ESPECIAL, s. 60-69
Emneord [en]
Metrology; Quality assurance; Rasch Measurement Theory; Psychometrics
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-39317OAI: oai:DiVA.org:ri-39317DiVA, id: diva2:1334566
Tilgjengelig fra: 2019-07-03 Laget: 2019-07-03 Sist oppdatert: 2019-07-05bibliografisk kontrollert

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Pendrill, LeslieMelin, Jeanette

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