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Introduction: The protein-energy malnutrition is the most prevalent cause of malnutrition and always occures in infants and children under 5 years old. According to the harmful effects of malnutrition, such as high mortality, inability of learning and decrease of mental and physical ability, reconnoite and study of malnutrition qualification is very important.
Material and Methods: This analytic cross-sectional study was carried out on 811 children under 5 years old who were living in rural zone of Arak. Based on health files, clinical inspections and interview with mothers a checklist was fulfilled for every child. Data were analysed by EPI6 software
Results: In this study, none of the children had stricken with Kwashiorkor or Marasmic-Kwashiorkor. Undernourished were seen in 7.39% and Marasmus were also seen in 1.1% of subjects. The prevalence of malnutrition was 7.5% in Wellcome, 33.55% in Waterlow-Stunting, 23.05% in Waterlow-Wasting and 30.94% in Gomez classification. There was statistically correlation between malnutrition and respiratory infection rate, milstones, birthweight, maturity and begning of helpfood (P<0.05).
Conclusion: Considering the results, the most rate of malnutrition in each classification was mild. It is suggested that increasing of familial awareness is an important factor for preventing from next damages and additional treatment costs.

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Background: Under-nutrition has multiple negative impacts on child's growth and development and it has a high prevalence among hospitalized children. Assessment of the food insecurity status is one of the most important indicators of malnutrition among communities, therefore the aim of the current study is to evaluate the prevalence of food insecurity and its social, economical and nutritional determinants among children hospitalized in Tabriz pediatric hospital.

Materials and Methods: The current cross-sectional study was carried out among 236 hospitalized children in Tabriz pediatric hospital. Demographic information including age, weight, height, household size, child order and household income were gathered by face to face interviews with parents. Food security was assessed by a Household Food Security questionnaire. Statistical analysis was performed by Excel 2007, Epi-info and IBM SPSS Statistics 21 software.

Results: The prevalence of food insecurity among hospitalized children in Tabriz pediatric hospital was 44.9%, while 26.3% and 18.6% had moderately and severely food insecurity, respectively. Its prevalence in females was more than in males. Low household income, low educational attainment of parents, rural residency and household size were potent determinants of food insecurity(p<0.05). All indices of nutritional status in food insecure group were lower than in secure group. Although this difference did not achieved significant threshold.

Conclusion: In the current study, a high prevalence of food insecurity in hospitalized children in hospital has been reported. Therefore the need for suitable interventions to reduce its prevalence has been warranted.