Abstract
BackgroundAdolescent smoking is a worldwide problem that is particularly severe in low- and middle-income countries. Many endogenous and environmental factors affect the intention to smoke, so a comprehensive model is needed to understand the significance and relationship of predictors. The study aimed to test the associations among information-motivation-behavioral skills (IMB) model constructs as predictors of intention to smoke in junior high school students in Shanghai, China.MethodsWe conducted a cross-sectional study of 16,500 junior high school students in Shanghai, China. Data on tobacco-related information, motivation, behavioral skills, and behaviors were collected from students. Structural equation model (SEM) was used to assess the IMB model.ResultsThe mean age of participants was 13.8 years old (standard deviation = 1.02; range 11–17). The experimental smoking rate among junior high school students was 6.6% and 8.7% of the participants expected that they would be smokers in 5 years. The IMB model provided acceptable fit to the data (comparative fit index = 0.984, root mean square error of approximation = 0.04). Intention to smoke was predicted by behavioral skills (β= 0.670, P < 0.001) and motivation (β= 0.095, P<0.001) among junior high school students.ConclusionThe IMB model provides a good understanding of the predictors of intention to smoke and it suggests future interventions among junior high school students should focus on improving motivation and behavioral skills.
Highlights
Non-communicable diseases (NCDs) are the leading cause of mortality, contributing to 36 million of the 57 million global deaths in 2008 [1]
The primary aims of this study are to identify the validity of information-motivation-behavioral skills (IMB) model and to test the associations among constructs as predictors of intention to smoke in junior high school students mostly aged 13-15 years
Sample and procedure A cross-sectional study of adolescents was conducted by asking students from junior high schools in Shanghai to complete the Chinese version of Global Youth Tobacco Survey (GYTS)
Summary
Non-communicable diseases (NCDs) are the leading cause of mortality, contributing to 36 million of the 57 million global deaths in 2008 [1]. Tobacco causes about a million deaths per year in China, and the deaths are likely to increase to 3 million by the middle of this century [3,4]. Children and adolescents are the most vulnerable of experimental smokers (smoking one or two puffs of a cigarette) and are more likely to progress to current smokers [5]. Tobacco experimentation among school children aged 13-15 in Shanghai is nearly 7% and the estimated prevalence of current cigarette smoking is 28.1% among adults aged 15 years and above in China[7]. The study aimed to test the associations among information-motivation-behavioral skills (IMB) model constructs as predictors of intention to smoke in junior high school students in Shanghai, China
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