Background & Aim: Diet rich in fruits and vegetables is shown to be an important factor in prevention of chronic diseases. Adolescence is a critical period in adopting eating behaviors. Schools are important social environments in adolescents' lives and are important settings for interventions that aim to improve eating behaviors, including fruit and vegetable intake. This study aimed to assess effectiveness of a school-based intervention based on social cognitive theory on fruit and vegetable (F&V) intake of female adolescents in Tehran.

Methods & Materials: This experimental school based field trial was conducted on 296 female students aged 10-13 years old (157 in the intervention and 139 in the control groups). The intervention included classroom nutrition education on F&V and increasing availability of F&V through school buffet. Psychosocial characteristics of the students were assessed using a questionnaire and F&V intake were measured using 24-hr recall method, at baseline and after three months intervention. Descriptive and inferential statistics were used for data analysis.

Results: After the intervention, vegetable and fruit intake were 0.6 and 0.63 servings higher in the intervention group compared to the controls. Knowledge and self-efficacy scores were significantly higher in the intervention group compared to the control group. Home availability and observational learning scores were significantly decreased in the intervention group.

Conclusion: Through the intervention process, many valuable experiences were gained to be used in future interventions.

Background & Aim: Unhealthy snacks consumption has an important role in childhood obesity. The aim of this study was to evaluate the effect of an educational intervention for mothers on the consumption of healthy snacks in children aged 1-5 years using social cognitive theory.

Methods & Materials: This quasi-experimental study was (IRCT2013062912456N2) conducted on 126 mothers who had children 1-5 years old in 2013. The mothers were selected from Hamadan health centers and divided into two groups of intervention and control. The intervention consisted of four sessions, a booklet, a short video, and 6 written messages. The constructs of SCT and food consumption frequency were assessed at baseline, 10 days after the last session and 2-months after the intervention. The data were analyzed by Chi-square test, independent t-test, repeated measures and covariance analysis using SPSS software version 16.

Results: At baseline, the two groups were similar in the demographic characteristics, the constructs of SCT, and unhealthy snacks consumption frequency (P>0.05). Considering that the interaction effects of group and time in the repeated measurement analysis of variance were significant, the means of two groups were compared at each stage using independent t test and significant differences between the two groups were observed at two stages after the intervention.

Conclusion: This intervention had a positive effect on the consumption of healthy snacks. Therefore, SCT and the implemented procedure could be used to develop interventions to modify snack consumption patterns in children.