Journal of Clinical Epidemiology
Volume 50, Issue 5 , Pages 529-540, May 1997

Assessing the responsiveness of a functional status measure: The sickness impact profile versus the SIP68

  • A.F. de Bruin

      Affiliations

    • Corresponding Author InformationAddress for correspondence: Ate Frans de Bruin, University of Limburg, Department of Medical Sociology, P.O. Box 616, 6200 MD Maastricht, The Netherlands.
    • Department of Medical Sociology, University of Limburg, 6200 MD Maastricht, The Netherlands
    • ,
  • J.P.M. Diederiks

      Affiliations

    • Department of Medical Sociology, University of Limburg, 6200 MD Maastricht, The Netherlands
    • IRV, 6430 AD Hoensbroek, The Netherlands
    • ,
  • L.P. de Witte

      Affiliations

    • Department of Medical Sociology, University of Limburg, 6200 MD Maastricht, The Netherlands
    • IRV, 6430 AD Hoensbroek, The Netherlands
    • ,
  • F.C.J. Stevens

      Affiliations

    • Department of Medical Sociology, University of Limburg, 6200 MD Maastricht, The Netherlands
    • ,
  • H. Philipsen

      Affiliations

    • Department of Medical Sociology, University of Limburg, 6200 MD Maastricht, The Netherlands

Accepted 6 January 1997.

Abstract 

In this study, the Sickness Impact Profile (SIP) and the SIP68 are studied for their ability to detect changes in health-related behavioral status. Methodological approaches toward responsiveness are invented and discussed. Next, literature findings on the responsiveness of the SIP are presented and judged for their validity. The SIP appeared to be able to demonstrate changes in the expected direction and in accordance with changes detected by other instruments. Using data from seven different longitudinal projects in populations with different diagnoses, the responsiveness of both the SIP136 and the SIP68 are subsequently studied and compared. In all populations, changes in functional status were indicated by both instruments. In terms of effect sizes, the SIP136 and the SIP68 do not differ significantly in their responsiveness. Moreover, changes detected by both SIPs appear to be valid representations of changes in health-related functional status.

Keywords:  Sickness Impact Profile, SIP68, responsiveness, functional-status change, methodology

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PII: S0895-4356(97)00047-4

Journal of Clinical Epidemiology
Volume 50, Issue 5 , Pages 529-540, May 1997

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