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Development and preliminary evaluation of the OsteoArthritis Questionnaire (OA-Quest): a psychometric study: methodological issues. Response

  • L. Busija
    Correspondence
    Address correspondence and reprint requests to: L. Busija, Institute for Health and Ageing, Australian Catholic University, Level 6, 215 Spring Street, Melbourne, 3000, Victoria, Australia.
    Affiliations
    Institute for Health and Ageing, Australian Catholic University, Level 6, 215 Spring Street, Melbourne, 3000, Victoria, Australia
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  • R. Buchbinder
    Affiliations
    Monash Department of Clinical Epidemiology, Cabrini Institute, Australia
    Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Australia
    Suite 41 Cabrini Medical Centre, 183 Wattletree Road, Malvern, 3144, Victoria, Australia
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  • R.H. Osborne
    Affiliations
    Public Health Innovation, Population Health Strategic Research Centre, School of Health and Social Development, Faculty of Health, Deakin University, 221 Burwood Highway, Burwood, 3125, Victoria, Australia
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Open ArchivePublished:November 02, 2016DOI:https://doi.org/10.1016/j.joca.2016.10.019
      Dear Editor,
      We would like to thank Safiri et al.

      Safiri S, Sani M, Ayubi E. Development and preliminary evaluation of the OsteoArthritis Questionnaire (OA-Quest): a psychometric study: methodological issues. Osteoarthr Cartil.

      for their careful reading of Busija et al. manuscript describing the development of the OsteoArthritis Questionnaire (OA-Quest)
      • Busija L.
      • Buchbinder R.
      • Osborne R.H.
      Development and preliminary evaluation of the OsteoArthritis Questionnaire (OA-Quest): a psychometric study.
      . We concur with Safiri et al. that it is not appropriate to conduct exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) on the same dataset. We would therefore like to draw the authors’ attention to page 1359 (Statistical analyses section) where we highlight this very issue, and describe the use of two separate subsamples in our study. One of these subsamples (n = 394) was used to conduct EFA and Rasch analysis and the second subsample (n = 398) was used to conduct CFA. Demographic and health characteristics of the two subsamples are clearly described on page 1362 (Questionnaire construction and evaluation subsamples section) and Table 3 of Busija et al. manuscript
      • Busija L.
      • Buchbinder R.
      • Osborne R.H.
      Development and preliminary evaluation of the OsteoArthritis Questionnaire (OA-Quest): a psychometric study.
      . Nonetheless, we unreservedly agree that questionnaire validation is an on-going process and fully acknowledge that psychometric properties of the OA-Quest warrant further evaluation in independent studies.

      Author contributions

      All authors were involved in conceptualising and drafting the response. All authors approved the submitted version of the response.

      Conflict of interest

      The authors have no conflict of interest to declare.

      Acknowledgements

      The authors received no financial assistance to undertake this work.

      References

      1. Safiri S, Sani M, Ayubi E. Development and preliminary evaluation of the OsteoArthritis Questionnaire (OA-Quest): a psychometric study: methodological issues. Osteoarthr Cartil.

        • Busija L.
        • Buchbinder R.
        • Osborne R.H.
        Development and preliminary evaluation of the OsteoArthritis Questionnaire (OA-Quest): a psychometric study.
        Osteoarthr Cartil. 2016; 24: 1357-1366