Towards standardization of measuring anxiety and depression: Differential item functioning for language and Dutch reference values of PROMIS item banks

• Ellen B. M. Elsman,

  Roles Formal analysis, Investigation, Visualization, Writing – original draft

  Affiliation Department of Epidemiology and Data Science, Amsterdam UMC, Amsterdam Public Health Research Institute, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands

  https://orcid.org/0000-0002-0680-6430

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• Gerard Flens,

  Roles Data curation, Investigation, Validation, Writing – review & editing

  Affiliation Alliance for Quality in Mental Health Care, Utrecht, The Netherlands

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• Edwin de Beurs,

  Roles Conceptualization, Writing – review & editing

  Affiliations Arkin GGZ, Amsterdam, The Netherlands, Clinical Psychology, Faculty of Social Sciences, Leiden University, Amsterdam, The Netherlands

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• Leo D. Roorda,

  Roles Conceptualization, Writing – review & editing

  Affiliation Amsterdam Rehabilitation Research Center | Reade, Amsterdam, The Netherlands

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• Caroline B. Terwee

  Roles Conceptualization, Investigation, Methodology, Resources, Supervision, Writing – review & editing

  * E-mail: cb.terwee@amsterdamumc.nl

  Affiliation Department of Epidemiology and Data Science, Amsterdam UMC, Amsterdam Public Health Research Institute, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands

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