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Quality of Life Research

Gepubliceerd in:

01-11-2014

Minimal evidence of response shift in the absence of a catalyst

Auteurs: Sara Ahmed, Richard Sawatzky, Jean-Frédéric Levesque, Deborah Ehrmann-Feldman, Carolyn E. Schwartz

Gepubliceerd in: Quality of Life Research | Uitgave 9/2014

Abstract

Background

Individuals with chronic conditions experience fluctuations in health status and thus may experience response shift. We sought to test the hypothesis that response shift effects would be non-significant among individuals with chronic disease who experienced relatively small changes in their health status over a 1-year period.

Methods

This secondary analysis utilized longitudinal cohort data on a community-based sample (n = 776) representing four chronic diseases (arthritis, heart failure, diabetes, or chronic obstructive pulmonary disease). Information on health-care utilization was obtained from the provincial health insurance database. Participants completed the SF-36 twice annually. Parameter invariance over 1 year in a second-order SF-36 factor structure was evaluated by adapting Oort’s approach by fitting a second-order measurement structure with first-order factors for the SF-36 subscales and second-order factors for physical and mental health status while accommodating ordinal data.

Results

Over 80 % of participants had no hospitalizations or emergency room visits over follow-up. The model had an acceptable fit when all measurement model parameters were constrained at both time points (RMSEA = .035, CFI = .97). There was no substantial difference in fit when measurement model parameters (item thresholds, first-order factor intercepts, and factor loadings) were allowed to vary over time.

Conclusion

Among chronically ill individuals with stable health, substantial response shift effects were not detected. These results support the theoretical proposition that response shift is not expected to occur in patients with relatively stable conditions.

vorige artikel Authors’ response to commentary by Twisk

volgende artikel Mapping the content of the Patient-Reported Outcomes Measurement Information System (PROMIS®) using the International Classification of Functioning, Health and Disability

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Titel: Minimal evidence of response shift in the absence of a catalyst
Auteurs: Sara Ahmed
Richard Sawatzky
Jean-Frédéric Levesque
Deborah Ehrmann-Feldman
Carolyn E. Schwartz
Publicatiedatum: 01-11-2014
Uitgeverij: Springer International Publishing
Gepubliceerd in: Quality of Life Research / Uitgave 9/2014
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI: https://doi.org/10.1007/s11136-014-0699-3

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Abstract

Background

Methods

Results

Conclusion

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