Journal of School of Public Health and

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  Background and Aim: Physical inactivity is one of the 10 leading causes of mortality and disability. This study aimed to investigate the effect of e-learning on physical activity and body mass index (BMI) of female-employees.

Materials and Methods: In this semi-experimental interventional study, 120 female-employees of Tehran University of Medical Sciences were selected randomly and assigned to a case or control group. Data were collected using a demographic and an international physical activity questionnaire. Pre-test and post-test questionnaires were completed by the case and control subjects prior to, and 2 months after the final phase of, the intervention. The intervention included virtual education through short message service (SMS), email messages or messages via intanet, and educational films for a period of 16 weeks. SPSS-17 was used to analyze the data, the statistical tests being Chi-square, independent and paired-t, and Fisher's exact tests.

  Results: The mean age of the participants was 41 and 39 years in the case and control group, respectively. Most of them held a bachelor's degree and were married with 1 or 2 children. After the intervention, the mean score of physical activity in the intervention group increased significantly as compared with the control value (p<0.001). However, the intervention did not produce any change in the mean BMI of the case in comparison with the control group (p=0.119), although it brought about a statistically significant reduction in the initial BMI (p<0.001).

  Conclusion: Web-based education, SMS and multi-media messages can increase physical activity in female-employees and might prevent illnesses caused by physical inativity.

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  Background an Aim: Aging trend especially in developing country is increasing. This study aimed to assess the nutritional status of the elderly and its associated factors in Gorgan .

  Materials and Methods: This is a cross sectional study that two-stage cluster sampling method was used for considering participant. The data were collected using Mini Nutritional Assessment and anthropometric questionnaire which was referred to the elderly inhabitant in urban area. 541 elder were interviewed and data were analyzed by chi square, independent T test and one way ANOVA tests.

  Results : The prevalence of malnutrition was %4/8 and nearly %44/7 of the elderly were at the risk of malnutrition. %51/9 of the elderly were on a special diet due to a disease or specific condition. Malnutrition frequency and the risk of it were higher in woman than men and the difference between sexes was statistically significant. BMI, mid arm circumference and calf circumference measures in elderly with malnutrition were less than elderly with good nutrition, and the difference was statistically significant

  Conclusion: The risk of malnutrition in elderly who exposed to socio-economic, mental and also dental difficulties, living alone and female old age was higher than others groups. The implementation of supportive and nutritional programs is more important in this group.

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Background and Aim: Malfunction in the energy homeostasis central system resulting from melanocortin receptor 4 (MC4R) mutations is considered to be an important factor in development of obesity. Although physical activity can weaken the effect of obesity-related genes, very few investigations have been carried out in relation to the MC4R gene. This study was conducted to investigate the association between physical activity and body mass index (BMI) in different MC4R genotypes (rs17782313).

Materials and Methods: A sample of 400 individuals was randomly selected from among subjects participating in the Iranian Multicenter Osteoporosis Study (IMOS). Their weights and heights were measured and their dietary intakes and physical activity data assessed using validated questionnaires. In addition, the different MC4R genotypes (rs17782313) were determined in the subjects by the PCR-RFLP method. Finally, using the adjusted multiple linear regression model, the probable effect of physical activity on BMI in different MC4R polymorphisms (rs17782313) was determined.

Results: Only in individuals with the CT genotype was a statistically significant association (p<0.05) observed between body mass index and physical activity (hr/d and METs-hr/wk).

Conclusions: Physical activity, particularly in heterozygous MC4R polymorphism individuals (rs17782313), can play an effective role in reducing body mass index.

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Background and Aim: Food preferences and health literacy ─ key determinants of food choices in childhood and adolescence ─ are determinants of chronic diseases in adulthood. This study aimed to determine associations between food preferences, health literacy and body mass index (BMI) among elementary school students in Malekan city, east Azarbayejan Province, Iran in 2021-2022.
Materials and Methods: This cross-sectional descriptive-analytical study included 582 male and female primary-schoolers in the fourth, fifth and sixth grades in both the public and private  schools in Malekan County (Malekan, Lilan, and Mubarakshahr) selected by the two-stage randomized cluster method. A questionnaire including background questions and questions about health literacy and a researcher-made checklist of food preferences was used to collect data online using the Pros-Online Platform. The content validity ratio and index were used to determine validity and Cronbach's alpha index to check for the reliability of the questionnaire (CVI=0.98, CVR=0.91, Cronbach's alpha > 0.7). Data were analyzed using Mann-Whitney, t-test, one-way analysis of variance, Kruskal-Wallis and Chi-square tests at a significance level of 0.05 using SPSS 26.
Results: The average health literacy score of all the students was rather low (52.9±00.33), that of the female students (55.7±36.49) being slightly higher than that of the boys (49. 9±29.79). Further analysis of the data showed that there was a statistically significant relationship between the students' food preferences and health literacy variables (p<0.001). Furthermore, statistically significant relationships were observed between the students' BMI and their food preferences (p˂0.001) and health literacy (p˂0.001).
Conclusion: Considering the low level of health literacy of the adolescents and a positive relationship between health literacy, food preferences and BMI in adolescents, it can be concluded that increasing their health literacy will improve their healthy food choices. Therefore, it seems that interventions based on a theoretical framework aiming at increasing the students’ health literacy and improving their food preferences can be beneficial to them as a potential strategy for improving their healthy eating patterns resulting in preventing overweight and obesity.