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Amis: Given the significant role of low birth weight (LBW) in infant death and disability and relevant childhood diseases, the present systematic review was conducted to determine the factors affecting newborns’ birth weight in Iran. Materials & Methods: This study is systematically reviewed all the observational studies carried out in Iran in 1990-2021 (Retrieval date: April 28, 2021). in four steps and through a search in Persian databases such as Magiran, SID and Irandoc and English databases including Embase, Cochrane Library, Web of Sciences, Google Scholar, PubMed and Scopus. All the relevant articles were searched by two researchers separately and collected using the research keywords and Boolean operators and a combination of relevant tags depending on the type of database. Quality of the articles was evaluated by 22-item Strengthening the Reporting of Observational studies in Epidemiology (STROBE) and Ottawa checklists, respectively. Findings: Of the 251 articles collected, 31 met the study inclusion criteria. Variables such as mother’s age (35%) and body mass index (BMI) (25%), preterm childbirth and diagnosis with a maternal chronic disease (25%) were found to be the most common causes of LBW in the reviewed studies, by order of prevalence. Conclusions: Given the results of this review study and since many of the known risk factors of LBW are preventable, the timely diagnosis, proper treatment and follow-up of women at risk can prevent the birth of LBW infants.

Keywords: birth weight|systematic review|Iran|Low Birth Weight ,

     

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