A Closer Look at the Validity and Reliability of the Persian Versions of National Institute of Health Stroke Scale and Modified National Institute of Health Stroke Scale in Hospitalized Patients

The present letter concerns the article written by Dehghani et al. [1]. First, we appreciate the efforts made by the editors of Galen Medical Journal to help publish such an important article. However, the present methodological approach of the mentioned study indicates some flaws resulting from the negligence of the authors, which has led to an ambiguous interpretation of the results. This letter aims to help readers understand the matter better. Therefore, some of the points expressed in this letter indicate what is yet essential to confirm valid and reliable scales. Psychometric studies can be very effective and valuable for healthcare workers since such studies provide valid and reliable scales [2]. One the one hand, an accurate and appropriate study design, helps researchers plan the study decently. On the other hand, it can direct readers either toward what has been or will be conducted in a study. Hence, to be more transparent, it is suggested that in psychometric studies, researchers apply an appropriate study design