Tehran University of Medical Sciences Archives of Anesthesiology and Critical Care 2423-5849 10 1 2023 09 26 66 74 Alireza Babajani Department of Anesthesia, Allied Medical School, Iran University of Medical Sciences, Tehran, Iran. Parisa Moradimajd Department of Anesthesia, Allied Medical School, Iran University of Medical Sciences, Tehran, Iran. Azam Saei Department of Anesthesia, Allied Medical School, Iran University of Medical Sciences, Tehran, Iran. Jamile Abolghasemi Department of Biostatistics, School of Public Health, Iran University of Medical Sciences, Tehran, Iran. 2023 03 13 2023 04 25 Background: Patient safety is one of the main elements of the quality of health services. Our aim of this study was to compile a complete checklist for the three stages of anesthesia. Methods: This research was a cross-sectional descriptive-analytical study. First, an internet search was conducted in databases to identify checklists related to safe Anesthesia. The WHO Safe Anesthesia Checklist was designated as the main checklist. Then, a brainstorming session was held with experts and according to the determined fields, the initial draft was compiled. Face and content validity were conducted. The reliability of the checklist was measured with Cronbach's alpha and intra class correlation index (ICC) methods. Results: The initial draft was compiled with 34 items. 29 items scored higher than 0.79 in terms of CVI (content validity index) The value of CVI of 5 items was less than the permissible limit and the edge of the border, which was revised and corrected by the research group. 2 items were returned to the research process according to the survey of experts and their necessity CVR (content validity ratio) (value >0/62) and 3 items were removed from the research process. Cronbach's alpha was calculated as 0.876 for the first evaluator and 0.870 for the second evaluator, and the percentage of agreement between the evaluators was 0.956 (P<0.001). Conclusion: We developed and evaluated a checklist for the three stages of anesthesia through an evidence-based study. We hope   this checklist can reduce and prevent clinical errors. https://aacc.tums.ac.ir/index.php/aacc/article/view/722