Effect of self-reported home smoking restriction on smoking initiation among adolescents in Taiwan: a prospective
Dih-Ling Luh1, Hsiu-Hsi Chen2, Amy Ming-Fang Yen3
1School of Public Health, Chung Shan Medical University, Taichung, Taiwan Department of Family and Community Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan.
Objective:
The aims of this study were to investigate the influence of home smoking restriction (HSR) and the modified effect of parental smoking on smoking initiation among adolescents.
Design:
Prospective Cohort Study.
Setting:
Junior high school in Keelung City, Taiwan.
Participants:
This study collected and evaluated primary data from the Adolescent Smoking and Other Health-Related Behaviour Survey conducted in Keelung City, which aimed to investigate smoking and health-related behaviours in junior high school students (2008-2009). Data on students free of smoking in 2008 and following them until 2009 (n=901) to ascertain whether they had started smoking were analysed with logistic regression mode to examine the proposed postulates.
Main Outcome Measure:
The outcome variable was smoking initiation, which was defined as smoking status (yes/no) in the 2009 follow-up questionnaire. The main independent variable was HSR obtained from an adolescent self-reported questionnaire. Information on parental smoking was measured by adolescents self-reporting the smoking behaviour of their father and mother.
Results:
The rate of HSR was 29.79% among 7th grade adolescents. The effect of HSR on smoking initiation in adolescents was statistically significantly modified by paternal smoking (p=0.04) but not by maternal smoking (p=0.54). The effect of HSR on smoking initiation was small for fathers with the habit of smoking (OR=0.89, 95% CI (0.42 to 1.88)), but the corresponding effect size was 3.2-fold (OR=2.84, 95% CI 1.19 to 6.81) for fathers without the habit of smoking.
Conclusions:
Paternal smoking behaviour may play an interactive role with HSR in preventing smoking initiation among Taiwanese adolescents.
