Changes in individual weight status based on body mass index and waist circumference in Hong Kong Chinese

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E-cigarette use, nicotine addiction and intention to quit among adolescent smokers in Hong Kong

Conference Theme: Tobacco and Non-Communicable DiseasesPoster Discussion 28. E-cigarettes: Evidence and Analysis: no. PD-924-20BACKGROUND: Although some studies have shown beneficial effects of e-cigarettes on smoking cessation in adults, less is known about e-cigarette use and its association with nicotine addiction and intention to quit smoking in adolescents. DESIGN/METHODS: A school-based smoking survey was conducted on 45857 secondary 1-6 (US Grade 7-12) students (response rate 96%) from 75 randomly selected secondary schools in Hong Kong in 2013/13. A total of 1768 (3.9%) current smokers (occasional or daily) were included in the present analysis. E-cigarette use in the past 30 days, intention to quit smoking (cigarette), and quit attempts in the past 12 months were recorded. Smoking …published_or_final_versio

Overestimation of peer smoking prevalence predicts smoking initiation among primary school students in Hong Kong

Purpose: To investigate the relationship between perceived prevalence of smoking and smoking initiation among Hong Kong primary second- to fourth-grade-students. Methods: A cohort of 2,171 students was surveyed in 2006 and again in 2008. Students who perceived ever-smoking prevalence in peers as "none" or "some" were considered as correct (reference group), whereas those who perceived it as "half" (overestimation) or "most/all" (gross overestimation) were considered as incorrect. Results: At baseline, overestimation was found to be cross-sectionally associated with ever-smoking (p < .01). At follow-up, 7.2% of never-smoking students with incorrect estimation at baseline had started smoking, which was 79% (95% confidence interval: 3%-213%), greater than that of 3.7% for those with correct estimation. Among the never-smoking students with incorrect estimation, subsequent correct estimation was associated with 70% (95% confidence interval: 47%-83%) lower risk of smoking initiation compared with persistent incorrect estimation. Conclusion: Overestimation of the prevalence of peer smoking predicted smoking initiation among children. Interventions should be carried out to evaluate whether correcting children's overestimation of peer smoking could reduce smoking initiation. © 2011 Society for Adolescent Health and Medicine.postprin

Secondhand smoke from multiple sources, thirdhand smoke and respiratory symptoms in Hong Kong adolescents

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Quitting smoking and mortality: risk of all-cause mortality decreased sharply in 5-9 years after quitting smoking among Chinese

e-PosterLi Ka Shing Faculty of Medicine Frontiers SeriesConference Theme: MOOCs in Postmodern Asia (Oct 27, 2014) and Big Data and Precision Medicine (Oct 28, 2014)postprin

Associations of unhappiness with sociodemographic factors and unhealthy behaviours in Chinese adolescents

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. Methods: In a school-based survey in 2012–13 in Hong Kong, 45 857 secondary school students (mean age 14.8 years, 54.0% boys) reported their happiness level (not happy at all/not very happy/happy/very happy), frequency of physical exercise, alcohol drinking status, smoking status and sociodemographic factors. A main and a sensitivity analysis examined the associations of unhappiness with the study factors, treating unhappiness as a binary (combining ‘not happy at all’ and ‘not very happy’) and a four-level ordered variable, respectively. Results: The main and the sensitivity analysis both showed that unhappiness was associated with older age, very poor families, non-intact families, more co-residing smokers, lack of physical exercise and alcohol drinking; current smokers were unhappier than never and ex-smokers; unhappiness also increased significantly with the number of unhealthy behaviours (P for trend < 0.001). Conclusions: In Chinese adolescents, unhappiness levels were higher in those who had a very poor family, a non-intact family and more co-residing smokers, and in those who were physically inactive, drank alcohol and smoked.postprin

Family smoking, exposure to secondhand smoke at home and family unhappiness in children

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Parental pro-smoking practices and smoking susceptibility among children in Hong Kong

Conference Theme: Tobacco and Non-Communicable DiseasesPoster Discussion 61. Assessing the Factors that Influence Tobacco Use: no. PD-1313-21BACKGROUND: Parental influence on children smoking is well known, but most studies focused on general parenting and less on smoking-specific parental practices. We investigated the association between some parental pro-smoking practices (PPP) and children smoking susceptibility. DESIGN/METHODS: Among 100 primary schools with students viewing an anti-smoking drama performance commissioned by the Hong Kong Council on Smoking and Health in 2012/13, 7 were randomly selected and 1255 primary 2-4 students (mean age 8.5±0.02, 42.8% boys) completed an anonymous self-administered questionnaire. Fifteen specific items of PPP in the past 30 days were …published_or_final_versio

Electronic cigarette use among adolescents: a cross-sectional study in Hong Kong

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E-cigarette use was associated with the intention to smoke in Chinese adolescents

Conference Theme: Tobacco and Non-Communicable DiseasesPoster Discussion 28. E-cigarettes: Evidence and Analysis: no. PD-923-20BACKGROUND: E-cigarette use arguably could reduce cigarette smoking and the intention to smoke, although such studies are few, especially in adolescents. We investigated the association between e-cigarette use and the intention to smoke in Chinese adolescent smokers and never-smokers. DESIGN/METHODS: A total of 45857 secondary 1-6 (US Grade 7-12) students (response rate 96%) from 75 randomly selected schools completed an anonymous questionnaire in 2012/13 in Hong Kong. Students were classified as never-smokers, experimenters (smoked just a few puffs), ex-smokers and current smokers (occasional or daily smoking). E-cigarette use in the past 30 days was …published_or_final_versio