![]() ![]() The Osterlind index was calculated for each item and for each of the four aspects. The judges also had an open-format section for comments. They were asked to score four aspects of each item on 5-point Likert scales to measure the following dimensions: representativeness, relevance, utility, and feasibility. They evaluated a list of 60 items systematically selected and classified into 12 dimensions. The participants were 22 judges with at least 3 years of experience in observational studies, sports areas, and methodology. To resolve these issues, this article aims to develop a checklist to measure the quality of sports-related observational studies based on a content validity study. Consequently, authors do not have a guide to follow in order to include all of the important elements in an observational study in sports areas, and reviewers do not have a reference tool for assessing this type of work. Although the importance and usefulness of sports-related observational studies have been widely shown, there is no checklist to report these studies. Applied to the specific area of sports, observational studies present advantages when comparing studies based on other designs, such as the flexibility for adapting to different contexts and the possibility of using non-standardized instruments as well as a high degree of development in specific software and data analysis. Observational studies are based on systematic observation, understood as an organized recording and quantification of behavior in its natural context.
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