title: Development of Children in Iran: A Systematic Review and Meta-Analysis.
abstract: BACKGROUND
  In order to gain a better perspective of the developmental status of children in different regions of Iran, this study was carried out to determine the prevalence and the factors impacting child development in Iranian studies.
  
  
  METHODS
  Articles published in Iranian and international journals indexed in the SID, PubMed, Scopus and Magiran databases from 2001-2015 were systematically reviewed using standard and sensitive keywords. After evaluating the quality of 155 articles in the initial search, 26 articles were analyzed according to the inclusion criteria. After investigations, meta-analysis was done for six studies and the results were combined using Random Effects model, and the heterogeneity of studies was evaluated using the I2 index. Data analysis was performed using STATA version 11.2.
  
  
  RESULTS
  Eagger & Beggs tests, respectively with 0/273 & 0/260 did not confirm the probability of publication bias in the data, but heterogeneity in studies was confirmed (p˂0/001). On such basis, the pooled prevalence of developmental disorder based on Random Effect model was calculated to be 0.146, CI (0/107-0/184). The prevalence of developmental disorders in children in the studies reviewed was reported between 7 to 22.4%. The most important risk factors were in SES )Socio Economic Status) and Prenatal, Perinatal, Neonatal &Child groups.
  
  
  CONCLUSIONS
  More extensive studies and early intervention with respect to causes of developmental delay in children seems necessary.
authors.affiliation: Professor of Pediatrics; Pediatric Neurorehabilitation Research Center, University of Social Welfare & Rehabilitation Sciences, Tehran, Iran. mah1372@yahoo.com.
authors.forename: Firoozeh
authors.initials: F
authors.lastname: Sajedi
authors.forename: Mahbobeh Ahmadi
authors.initials: MA
authors.lastname: Doulabi
authors.forename: Roshanak
authors.initials: R
authors.lastname: Vameghi
authors.forename: Alireza Akbarzadeh
authors.initials: AA
authors.lastname: Baghban
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Mazaheri
authors.forename: Zohreh
authors.initials: Z
authors.lastname: Mahmodi
authors.forename: Erfan
authors.initials: E
authors.lastname: Ghasemi