Lok Tung Leung

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BACKGROUND Electronic cigarettes (e-cigarettes) are increasingly used in adolescents with unknown impacts on conventional cigarette smoking. We examined the associations of e-cigarette use with smoking intention, nicotine addiction and smoking cessation in Chinese adolescents. METHODS A total of 45,128 students (age 14.6 ± 1.9; boys 51.4%) from 75(More)
INTRODUCTION Waterpipe smoking has become increasingly popular in adolescents. We examined the association of waterpipe smoking with cigarette smoking susceptibility and nicotine dependence among adolescents in Hong Kong. METHODS We analyzed the data of School-based Survey on Smoking among Students 2012/13 from a representative sample of 45,857 secondary(More)
OBJECTIVES To investigate secondhand smoke (SHS) exposure at home from neighbours in Hong Kong adolescents and its association with respiratory symptoms in never-smokers. DESIGN A cross-sectional study. SETTING 79 randomly selected secondary schools in Hong Kong. PARTICIPANTS 61,810 secondary 1 (USA grade 7) to 7 students, in which 50,762(More)
BACKGROUND Little is known about electronic cigarette (e-cigarette) use among Chinese adolescents. We examined the prevalence of current (past 30-day) e-cigarette use and its associated factors in a large sample of adolescents in Hong Kong. METHODS We analyzed data of the School-based Survey on Smoking among Students 2012/13 from a representative sample(More)
INTRODUCTION Reports on involuntary tobacco smoke exposure in children have focused mostly on secondhand smoke (SHS) from smoking inside the home. We studied the separate and combined prevalence of SHS exposure from multiple sources and thirdhand smoke (THS) and the associations with respiratory symptoms in Hong Kong adolescents. METHODS In 2010-2011, 61(More)
To examine the prevalence of waterpipe smoking and its associated factors among adolescents in Hong Kong. We analyzed data of the School-based Survey on Smoking among Students 2012/2013 from a representative sample of 45,857 secondary school students in Hong Kong (mean age 14.8, SD 1.9). We conducted Chi-square tests and t test to compare current (past 30(More)
Background Evidence on the effects of lack of physical exercise, alcohol drinking and smoking on happiness is limited and inconsistent. We examined the associations of unhappiness with sociodemographic factors and these unhealthy behaviours in Chinese adolescents. In a school-based survey in 2012-13 in Hong Kong, 45 857 secondary school students (mean age(More)
OBJECTIVE To examine the associations of perceived interparental relationship, family harmony and family happiness with smoking intention in never-smoking Chinese children and adolescents in Hong Kong. DESIGN, SETTINGS AND PARTICIPANTS Cross-sectional surveys of 15 753 primary (grades 4-6) and 38 398 secondary (grades 7-12) never-smoking students from 71(More)
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