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This is a critique of Beemster et al.’s article ‘The interpretation of change score of the pain disability index after vocational rehabilitation is baseline dependent’ (2018). The methodological issues in question include the choices of anchor to determine the minimal important change, and the intraclass correlation coefficient on which the calculation of the standard error of measurement was based. We believe these undermine the authors’ interpretation.

health and quality of life outcomes

Methodological and interpretive concerns about Beemster et al.’s article ‘The interpretation of change score of the pain disability index after vocational rehabilitation is baseline dependent’: a letter to the editor