IRCT2017081935772N1 IRCT 2017-11-12 Vice Chancellor for research of Birjand University of Medical Sciences The effect of educational intervention on BMI and thyroid function test - The effect of educational intervention on body mass index and thyroid function tests in children and adolescents with obesity or overweight 2015-03-20 anticipated 126 Complete https://irct.ir/trial/26936 interventional Randomization: Not randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Prevention, Other design features: In this study, the areas in Birjand were initially arranged based on school distribution, later, the elementary levels, middle schools, and high schools in each area were classified and divided into clusters, then, the random samples of each cluster were systematically selected from obese children and adolescents who had health records in Atherosclerosis and Coronary Artery Research Center. Assignment of samples to the two groups (control and intervention) is non-random. 2-3 Condition 1: Thyroid disorders. Condition 2: Obesity and overweight. Intervention 1: Intervention group: In the intervention group, the training was lectured with PowerPoint for parents, children, and adolescents in six meetings (every month, one meeting) which included the following subjects: obesity definition and its disadvantage in childhood and adulthood; the importance and benefits of weight control; recommendations and necessary actions for weight control, lifestyle modification, healthy diet, physical activity, and parental attitudes towards children. This intervention was 6 months. Intervention 2: Control group: In the control group, educational intervention is not performed.