fa بررسی وزن‌گیری شیرخواران مواجهه یافته با دود محیطی سیگار کارآزمایی بالینی Clinical Trials <p>Background and Objective: Infant exposure to environmental tobacco smoke is a major public health problem. The aim of this study was to determine the effects of environmental tobacco smoke exposure on infant weight. Materials and Methods: This was a prospective cohort study. Participants of this study were 51 exposed and 51 non-exposed infants whose weight was measured in three periods of 5-7 days of age and also 2 and 4 months of age. Environmental tobacco smoke exposure of infants and their urinary cotinine were assessed by a questionnaire. The urine samples were collected during each follow-up. For data analysis, independent t test, chi-square and Fisher&#39;s Kappa tests were used. Results: Mean urinary cotinine levels over 5-7 days, 2 months and 4 months of age in the exposed group was significantly higher than in the non-exposed group (P<0.001). The mean weight of the exposed group was significantly lower than the non-exposed group in 2 and 4 months of age (P<0.001(. Conclusion: The results of this study show the weigh loss among infants exposed to environmental tobacco smoke, so we suggest further studies with longer follow-up periods and in all aspects of infants&rsquo; life.</p> Keywords: Environmental tobacco smoke, Infant, Cotinine 95 106 http://journal.zums.ac.ir/browse.php?a_code=A-10-4-753&slc_lang=fa&sid=1 Azam Baheiraei اعظم بحیرایی 5200319475328460059447 5200319475328460059447 No Azar Shamsi آذر شمسی a.midwifery@gmail.com 5200319475328460059448 5200319475328460059448 Yes Dept. of Maternal and Child Health, Tehran University of Medical Sciences, Tehran, Iran Afshin Mohseni far افشین محسنی فر 5200319475328460059449 5200319475328460059449 No Anushiravan Kazem Nejad A انوشیروان کاظم نژاد 5200319475328460059450 5200319475328460059450 No Mohammad Milani محمد میلانی 5200319475328460059451 5200319475328460059451 No Seyed Ali Keshavarz سید علی کشاورز 5200319475328460059452 5200319475328460059452 No