In this Journal, Lewis and colleagues introduced a new Reliable Change Index (RCI(WSD)), which incorporated the within-subject standard deviation (WSD) of a repeated measurement design as the standard error. In this note, two opposite errors in using WSD this way are demonstrated. First, being the standard error of measurement of only a single assessment makes WSD too small when practice effect...

objectives: the aim of this study was to translate the craig hospital inventory of environmental factors (chief) into persian language and to evaluate the validity and reliability of persian version of chief to use for children with cerebral palsy. methods: the chief was translated from english into persian based on the international quality of life assessment (iqola) approach. the persian vers...

background: considering the importance of updating information about incidence and mortality of common or fatal cancers and the need for studying the effectiveness   of   changes   in   the   iranian   cancer   registration   system   from pathological based to population based since 2007, the aim of this study was to provide updated population based information on incidence and mortality rates...