نسرین زحمتکش رخی

Sedentary lifestyle is the fourth leading cause of death worldwide. More than %80 of adolescents and young people, especially young girls, worldwide do not have enough physical activity. The present study was designed to determine the effect of education based on health belief model on high-risk sedentary physical activity in female students.

 In this randomized controlled clinical trial, 62 female students of Mashhad University of Medical Sciences in 2020-2021 were selected by convenience sampling method and randomly divided into experimental and control groups based on the dormitory. The educational intervention was performed in two training sessions of 60 to 90 minutes in the form of a webinar, based on the structures of the health belief model. Data collection tools include demographic information form, a researcher-made questionnaire including health belief model constructs, knowledge and subscale of physical activity questionnaire, and Persian version of Youth Risk Behavior Assessment Questionnaire (YRBS 2019) (YRBS 2019), which were used after assessing validity and reliability. The collected data were analyzed using descriptive and inferential statistical tests with SPSS software version 21.

Two groups were homogeneous based on age. Before the intervention, there were not statistically significant differences between both groups in the mean scores in the field of Knowledge, high-risk physical mobility behavior, and all the health belief model constructs, , but after the intervention, the differences between two groups in the mentioned criteria were statistically significant (P <0.001).

Education based on the health belief model is effective in reducing the high-risk behavior of physical inactivity, so the educational program of the present study can be used in order to reduce physical inactivity behavior in female students.

High-risk behaviors are of the most important health and psychological and social challenges that most countries in the world are involved with in some way. The purpose of this study was to evaluate the psychometric properties of the Youth Risk Behavior Assessment Questionnaire (YRBS 2019) for the Iranian youth population.

This was a descriptive-analytical cross-sectional study in which the statistical population consisted of university students in Mashhad City, Iran, in the academic year of 2020-2021. Participants were 400 eligible students who were selected using stratified random sampling method. After translating the questionnaire using translation-retranslation method, content validity was assessed using relative content validity coefficient (CVR) and content validity index (CVI), construct validity using factor analysis, reliability using intra-cluster correlation coefficient, and internal consistency was assessed using Cronbach's alpha.

The mean age of students was 23.54 ± 2.36 years. Indices related to content and face validity of 40 items were confirmed. Confirmatory factor analysis confirmed the structure of 6 factors, and the total of 25 questions. Cronbach's alpha value was confirmed in all domains and in total, more than 0.7 for all. The intra-cluster correlation coefficient (ICC) was 0.735 (P = 0.007) which indicated the reliability of the questionnaire. 

The YRBS short form questionnaire had the necessary psychometric properties for assessing high-risk behaviors of young people. In this study, 6 factors extracted in YRBS questionnaire were consistent with the factors extracted in the original version; therefore, it is suggested to use this tool to detect high-risk behaviors in young people.