International Journal of Health Studies2423-659461 20200114 Validity and Reliability of Adult ADHD Self-Report Scale Persian Version (ASRS-V1.1-Persian) 10 12 10.22100/ijhs.v6i1.718EN Seyed Abbas Mousavi Department of Psychiatry, Mazandaran University of Medical Sciences, Sari, Iran. Zahra Bazrafshan General Practitioner, Golestan University of Medical Sciences, Golestan, Iran. Ahmad Khosravi Center for Health Related Social and Behavioral Sciences Research, Shahroud University of Medical Sciences, Shahroud, Iran. 20191231 20200114 Background: Attention-deficit/hyperactivity disorder (ADHD) is a common mental disorder in adults. The objective of this study was to develop a valid Persian version of the 18-question ASRS-V1.1 according to WHO translation protocol and report its psychometric properties.Methods: In the first step, we translated the original 18-question ASRS-V1.1 version into Persian under the supervision of the WMH-CIDI advisory committee. The process of adaptation was consisting of forward-translation, expert panel evaluation, back translation, cross-cultural adaptation, pre-testing, and final adjustment. In the second step, we conducted a cross-sectional study with 734 students were studied in Shahroud in 2013. A sub-sample of subjects consists of 99 students were clinically interviewed according to DSM-IV-TR criteria by a well-trained physician.Results: The ASRS-V1.1-P had satisfactory internal consistency (Cronbach’s alpha = 0.85). Sensitivity and specificity for the first six questions of ASRS-V1.1-P were 50.0% (95% CI: 30.3-69.6) and 80.5% (95%CI: 70.7-88.3), respectively. Finally, 43 subjects (5.5%) were confirmed for adult ADHD. There was not sex predominance in the prevalence of ADHD.Conclusion: Totally, it may be concluded that adult ADHD is a common problem among students and prevention of this disorder is crucial to reduce the probable subsequent social, educational, and job problems in future. The 18-question ASRS-V1.1-P is a psychometrically reliable and valid measure for screening ADHD in adults. Keywords: Attention-deficit/hyperactivity disorder, Screening, Adult, Validity.