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Measurement properties of the 12-item Short-Form Health Survey in stroke
Kristianstad University, School of Health and Society, Avdelningen för Hälsovetenskap I. Kristianstad University, Research Environment PRO-CARE.ORCID iD: 0000-0003-4820-6203
Kristianstad University, School of Health and Society, Avdelningen för Hälsovetenskap I. Kristianstad University, Research Environment PRO-CARE. Kristianstad University, Forskningsplattformen Hälsa i samverkan.ORCID iD: 0000-0003-2174-372X
2014 (English)In: Journal of Neuroscience Nursing, ISSN 0888-0395, E-ISSN 1945-2810, Vol. 46, no 1, 34-45 p.Article in journal (Refereed) Published
Abstract [en]

Background: The 12-item Short-Form Health Survey (SF-12) was developed to measure perceived physical and mental health. Some studies of the psychometric properties, using classical test theory, of the SF-12 provide support for its use in patients with stroke, but it has not been scrutinized using recommended modern test theory approaches such as the Rasch measurement model among stroke survivors.

Objectives: This study sought to explore the measurement properties of the SF-12 physical and mental health scales among people with stroke using the Rasch measurement model.

Design: A cross-sectional design was used in this study.

Methods: All patients discharged from a dedicated stroke unit in southern Sweden during 6 months were asked to participate 6 months later. Of 120 stroke survivors, 89 (74%) agreed to participate. Rasch analysis was used to assess the measurement properties of the SF-12 physical and mental component summary scores (PCS-12 and MCS-12, respectively).

Results: For the PCS-12, we identified problems with targeting, overall and item-level fit, representing local response dependency, and multidimensionality. For the MCS-12, there were problems related to targeting (the persons felt better than the scale could conceptualize) and response categories that did not function as expected. However, MCS-12 items displayed reasonable model fit without indications of multidimensionality but with signs of local response dependency.

Conclusion: The measurement properties of the MCS-12 in stroke appear reasonable unless milder mental health problems are of interest, whereas those of the PCS-12 are less acceptable. Given the interdependence between MCS-12 and PCS-12 that is inherent with the standard SF-12 scoring algorithm, such data should be interpreted with caution.

Place, publisher, year, edition, pages
2014. Vol. 46, no 1, 34-45 p.
Keyword [en]
classical test theory, health measurement, patient-reported outcomes, Rasch analysis, stroke, SF-12, 01376517-201402000-00005
National Category
Nursing
Identifiers
URN: urn:nbn:se:hkr:diva-11625DOI: 10.1097/JNN.0000000000000027ISI: 000330857600007PubMedID: 24399165OAI: oai:DiVA.org:hkr-11625DiVA: diva2:685915
Available from: 2014-01-10 Created: 2014-01-10 Last updated: 2014-12-07Bibliographically approved

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