The Danish National Youth Study 2014: Study design, population characteristics and non-response analysis

Pisinger, Veronica; Mikkelsen, Stine Schou; Bendtsen, Pernille; Egan, Kia Kejlskov; Tolstrup, Janne S

doi:10.1177/1403494817729283

Cited by 34 publications

(56 citation statements)

References 12 publications

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“…A thorough description of the study methods and population characteristics of the Danish National Youth Study 2014 have been given elsewhere 19 . The Danish National Youth Study 2014 was conducted with the aim of investigating health, health behavior and mental health among young people in secondary education in Denmark.…”

Section: The Danish National Youth Study 2014mentioning

confidence: 99%

Trends in smoking and smokeless tobacco use among Danish Adolescents, 1997-2014

Tolstrup

Pisinger

Egan

et al. 2018

Tob. Prev. Cessation

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INTRODUCTION High rates of smoking among adolescents remain a public health concern. This study investigates smoking behavior and use of smokeless tobacco among Danish high-school students and assesses how smoking and use of smokeless tobacco cluster in schools and school classes. We estimate the trend in cigarette smoking from 1997 to 2014. METHODS We used data on 70 243 students, from 3 214 school classes in 119 high schools, who participated in the Danish National Youth Study from 2014. We had information on 87% of all Danish high schools and 85% of eligible students. We also used data from 1997 on 26 644 high-school students from a similar data set to assess the chronological trend in smoking. We calculated prevalences and intraclass correlation coefficients (ICCs) to estimate between-school and between-school class clustering in smoking and use of smokeless tobacco. RESULTS In all, 14% of boys and 11% of girls were daily smokers. A large fraction of the variation in smoking and the use of smokeless tobacco was attributable to the school and school-class level (ICC of 0.19, 0.12, 0.16 and 0.27, for daily smoking, waterpipe smoking, use of electronic cigarettes and snuff/chewing tobacco, respectively). Daily smoking decreased from 15% in 1997 to 12% in 2014, while more students were occasional smokers in 2014 than in 1997 (30% vs 18%). CONCLUSIONS The prevalence of smoking was high among Danish high-school students and had changed little since 1997. The school and class environment accounted for a large part of the variation in smoking behavior. INTRODUCTIONDespite the solid evidence of smoking's addictive properties and the comprehensive associated harms, high rates of smoking among adolescents remain a global public health concern. In 2015, 18 countries in western and central Europe had a smoking prevalence among girls, aged between 15 and 19 years, higher than 15%, and only three countries worldwide had significant decreases in adolescent smoking in the period from 2005 to 2015 1 . During the last decade, alternative smoke and smokeless products have become available and are being increasingly used; most popular are electronic cigarettes (e-cigarettes) and waterpipe, and also smokeless products such as snuff and chewing tobacco [2][3][4][5] . While there is little doubt that these products in themselves are less dangerous than cigarettes 6,7 , they are not harmless and there is concern that their use is associated with an increased risk of smoking initiation 3,[8][9][10] . High school constitutes a time of transition characterized by physical, psychological and social changes during which environment and opinions of peers become increasingly important to young people while parents' influence declines [11][12][13] . The school is an important setting that influences young people as they spend a large part of their day interacting with the school environment and other students. Research

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Section: The Danish National Youth Study 2014mentioning

confidence: 99%

Trends in smoking and smokeless tobacco use among Danish Adolescents, 1997-2014

Tolstrup

Pisinger

Egan

et al. 2018

Tob. Prev. Cessation

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Danish National Youth Study was conducted with the aim of investigating health, health behaviour and mental health among young people in secondary education in Denmark. A thorough description of the study design and population characteristics of the Danish National Youth Study 2014 have been provided elsewhere (29). The respective study includes high school students.…”

Section: Methods the Danish National Youth Study 2014mentioning

confidence: 99%

School- and class-level variation in self-harm, suicide ideation and suicide attempts in Danish high schools

Pisinger

Hawton

Tolstrup

2018

Scand J Public Health

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“…We wanted to recruit high schools with the lowest proportion of students with a high level of well-being to reach those in most need (strategic sample). We ranked the 119 high schools that participated in the DNYS [30] based on the proportion of students with a high level of life satisfaction (step 9-10 on the Cantril Ladder of Life Scale. See description below).…”

Section: Setting and Target Group: The Upper Secondary School Leavingmentioning

confidence: 99%

“…The student questionnaire is mainly based on validated measures from the DNYS [30] and the Health Behaviour in School-aged Children (HBSC) study [45] and supplemented with items from other studies including the Boost study [46] and the Pro Children study [47]. The items were either transferred directly or adjusted according to our study population.…”

Section: Student Questionnairesmentioning

confidence: 99%

“…The items for the school administrator questionnaire were developed specifically for the HHS study by the research group. The items are inspired by staff questionnaires from the DNYS [30], the HBSC study [45], the Boost study [46] and the X:IT study [48]. The questionnaire covers the following themes: Structural, physical, educational and social school environment with a specific focus on past and ongoing initiatives regarding well-being, sense of community, stress, sleep, PA and meal habits as well as organisational capacity to implement health promoting initiatives.…”

Section: School Administrator Questionnairesmentioning

confidence: 99%

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Study protocol of the Healthy High School study: a school-based intervention to improve well-being among high school students in Denmark

et al. 2020

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Background: The prevalence of low well-being, perceived stress and unhealthy behaviours is high among high school students, but few interventions have addressed these problems. The aim of this paper is to present a study protocol of a cluster randomised controlled trial evaluating the Healthy High School (HHS) intervention programme. The intervention programme is designed to improve well-being (primary outcome) by preventing 1) stress and promoting 2) sleep, 3) sense of community, 4) physical activity (PA) and 5) regular and healthy meals among high school students in Denmark. Methods: The development of the HHS study was guided by the Intervention Mapping protocol. The intervention comprises four components: 1) a teaching material, 2) a smartphone app, 3) a catalogue focusing on environmental changes, and 4) a peer-led innovation workshop aiming at inspiring students to initiate and participate in various movement activities. The HHS study employs a cluster-randomised controlled trial design. Thirty-one high schools across Denmark were randomly allocated to intervention (16 schools) or control (15 schools) groups. The study included all first-year students (~16 years of age) (n = 5976 students). Timeline: Intervention: August 2016-June 2017. Collection of questionnaire data: Baseline (August 2016), 1st follow-up (May 2017) and 2nd follow-up (April 2018). All students were invited to participate in a monthly sub-study about perceived stress using text messages for data collection (September 2016-June 2017). PA was objectively assessed among a sub-sample of students using accelerometers (Axivity, AX3) in August 2016 and May 2017. Primary outcome measures: Student well-being measured by the Cantril Ladder and the five item World Health Organisation Well-being Index (individual level outcomes). Secondary outcome measures: Stress (10-item Perceived Stress Scale), sleep (quantity and quality), PA (hours of moderate-to-vigorous PA per week, hours of daily sedentary time and average daily PA), meal habits (daily intake of breakfast, lunch, snacks and water), and strong sense of community in class and at school, respectively (individual level outcomes). The study encompasses process and effect evaluation as well as health economic analyses.

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The Danish National Youth Study 2014: Study design, population characteristics and non-response analysis

Cited by 34 publications

References 12 publications

Trends in smoking and smokeless tobacco use among Danish Adolescents, 1997-2014

Trends in smoking and smokeless tobacco use among Danish Adolescents, 1997-2014

School- and class-level variation in self-harm, suicide ideation and suicide attempts in Danish high schools

Study protocol of the Healthy High School study: a school-based intervention to improve well-being among high school students in Denmark

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