fa اعتبارسنجی گزارش الگوی خواب کودکان توسط والدین با استفاده از روش عینی اکتی‌گراف کارآزمایی بالینی Clinical Trials Background and Objective: Sleep Diary is the most practical and cost-effective tool for evaluating sleep habits. However, measurement errors are common issues with self report methods in medical research. The aim of the present study was to evaluate a self- report method compared to Actigraph in assessing sleep patterns in children. Materials and Methods: This cross-sectional study was conducted on 270 children aged 6 to 9 years who were selected by multistage sampling in primary schools of Tehran. The sleep patterns during a week were measured using two methods of self- report and Actigraph. The parents were asked to report the sleep pattern of their children. Results: The results of the current study indicated that sleep duration determined through the self- report method was overestimated compared to Actigraph (P=0.001). Parents reported the onset of children sleep significantly earlier than Actigraph (P=0.001). There was no significant difference between self- report and Actigraph for wake -up time. Conclusion: The findings of this study illustrate low accuracy of self- report method for determining sleep duration and sleep onset in children. Although, self report is a valid method for measuring wake -up time in children, it has a low validity for assessing the other components of sleep pattern. Keywords: Sleep pattern, Actigraphy, Children 108 119 http://journal.zums.ac.ir/browse.php?a_code=A-10-4-742&slc_lang=fa&sid=1 Somaieh Yosaee سمیه یوسایی 5200319475328460059490 5200319475328460059490 No Dept. of Clinical Nutrition, School of Nutrition Sciences and Dietetic, Tehran University of Medical Sciences, Tehran, Iran Amir Saber Gharamaleki امیر صابر قراملکی 5200319475328460059491 5200319475328460059491 No Dept. of Clinical Nutrition, School of Nutrition Sciences and Dietetic, Tehran University of Medical Sciences, Tehran, Iran Ayyub Zamani ایوب زمانی 5200319475328460059492 5200319475328460059492 No Dept. of Clinical Nutrition, School of Nutrition Sciences and Dietetic, Tehran University of Medical Sciences, Tehran, Iran Ahmad Khosravi احمد خسروی 5200319475328460059493 5200319475328460059493 No Center for Health Related Social & Behavioral Sciences Research, Shahroud University of Medical Sciences, Shahroud, Iran Kourosh jafarian کوروش جعفریان kdjafarian@sina.tums.ac.ir 5200319475328460059494 5200319475328460059494 Yes Dept. of Clinical Nutrition, School of Nutrition Sciences and Dietetic, Tehran University of Medical Sciences, Tehran, Iran