![]() ![]() Resultsĭata were extracted from 114 relevant articles. Agreements between authors were assessed, and practices of validation were described. Three selection criteria were applied including a search strategy, an article selection strategy, and data extraction. MethodsĪ literature review of articles published in PubMed between January 2009 and September 2011 was conducted. The aim of this research was to list and describe practices in PRO and proxy PRO primary psychometric validation studies, focusing primarily on the practices used to determine sample size. This quantitative evaluation requires a study to be conducted on an appropriate sample size. ![]() For these instruments to be useful in clinical research, they must undergo a proper psychometric validation, including demonstration of cross-sectional and longitudinal measurement properties. New patient reported outcome (PRO) measures are regularly developed to assess various aspects of the patients’ perspective on their disease and treatment. ![]()
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