Differential Item Functioning in the SF-36 Physical Functioning and Mental Health Sub-Scales: A Population-Based Investigation in the Canadian Multicentre Osteoporosis Study

• Lisa M. Lix ,

  * E-mail: lisa.lix@umanitoba.ca

  Affiliation Department of Community Health Sciences, University of Manitoba, Winnipeg, MB, Canada

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• Xiuyun Wu,

  Affiliation School of Health and Human Performance, Dalhousie University, Halifax, NS, Canada

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• Wilma Hopman,

  Affiliation Department of Public Health Sciences, Queen’s University, Kingston, ON, Canada

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• Nancy Mayo,

  Affiliation Division of Clinical Epidemiology, McGill University Health Centre, Montréal, QC, Canada

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• Tolulope T. Sajobi,

  Affiliation Department of Community Health Sciences & O’Brien Institute for Public Health, University of Calgary, Calgary, AB, Canada

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• Juxin Liu,

  Affiliation Departmentof Mathematics and Statistics, University of Saskatchewan, Saskatoon, SK, Canada

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• Jerilynn C. Prior,

  Affiliation Medicine and Endocrinology, University of British Columbia, Vancouver, BC, Canada

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• Alexandra Papaioannou,

  Affiliation Departmentof Medicine, McMaster University, Hamilton, ON, Canada

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• Robert G. Josse,

  Affiliation Departmentof Medicine, Faculty of Medicine, University of Toronto, Toronto ON, Canada

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• Tanveer E. Towheed,

  Affiliation Department of Medicine, Queen’s University, Kingston, ON, Canada

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• K. Shawn Davison,

  Affiliation Facultyof Graduate Studies, University of Victoria, Victoria, BC, Canada

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• Richard Sawatzky

  Affiliation School of Nursing, Trinity Western University &Centre for Health Evaluation and Outcomes Sciences, Providence Health Care, Langley, BC, Canada

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