Browsing University of Waterloo by Supervisor "Leatherdale, Scott"
Now showing items 1-18 of 18
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Body Mass Index and Missing Data: Examining the Levels, Patterns, and Impacts of Missing Data in a Large Cohort Study of Canadian Youth
(University of Waterloo, 2022-12-19)Missing data are generally unavoidable in survey-based research. Small amounts of random missingness may not pose significant problems; however, issues arise when data are missing in large proportions or when missingness ... -
Changes to Recreational Programming Within the School Environment and Student Physical Activity: A Longitudinal Examination from Year 2 to Year 3 of the COMPASS Study
(University of Waterloo, 2016-05-16)Objective: This study examined the influence of changes to school recreational programming on the prevalence and likelihood of Ontario and Alberta secondary school students meeting the (i) Canadian Society for Exercise ... -
Characterizing poly-substance use and its associations with anxiety and depression among a sample of Canadian high school students
(University of Waterloo, 2022-01-05)In any given year, one in five Canadians experience mental illness. The majority of mental illnesses originate in adolescence or young adulthood. Many complex factors can contribute to this, including substance use. However, ... -
Evaluating the Impact of Changes in School-Based Tobacco Interventions Among Never Smokers Between Year 2 and Year 3 of the COMPASS Study
(University of Waterloo, 2016-07-07)Objective:To examine how changes in school-based tobacco programming within a school influenced smoking susceptibility and smoking initiation outcomes among a sample of grade 9 to 12 students over time. Methods: This study ... -
Evaluating the Impact of Changes to School-Level Alcohol Prevention Policies and Programs on Youth Binge Drinking: A Longitudinal Analysis of the Year 2 and Year 3 Data of the COMPASS Study
(University of Waterloo, 2016-06-15)Objective: The purpose of this study was to investigate the effectiveness of alcohol prevention policies and programs implemented in a linked sample of Ontario COMPASS high schools in reducing youth binge drinking over ... -
Examining how changes in school-level intramurals impact physical activity among Ontario youth over time: A natural experiment evaluation from the COMPASS study
(University of Waterloo, 2021-06-21)Introduction: Moderate-to-vigorous physical activity (MVPA) has many health benefits for youth. However, the majority of Canadian youth are falling short of the recommended 60 minutes of MVPA per day. Since youth spend a ... -
Examining the Role of the School Food Environment in Moderating Sugar-sweetened Beverage Consumption Among Adolescents in Alberta and Ontario, Canada: Cross-sectional and Longitudinal Evidence from the COMPASS Study
(University of Waterloo, 2018-04-27)Adolescents represent the greatest consumers of sugar-sweetened beverages (SSBs) in Canada, which is concerning, given the numerous adverse health outcomes associated with frequent SSB intake. Provincial school nutrition ... -
Examining trends, predictors, and mediators of e-cigarette use and smoking among Canadian youth: Findings from the COMPASS study
(University of Waterloo, 2021-04-19)Abstract The objectives of this dissertation were to (1) examine trends and predictors of youth e-cigarette use and cigarette smoking, (2) explore potential mediators of the association between initial e-cigarette use ... -
Exploring reluctancy towards help-seeking at school among youth in the COMPASS study
(University of Waterloo, 2020-07-06)Background: Despite the high prevalence of mental health problems that emerge during adolescence, it has been observed that young people are among the least likely to seek help. Considering that many adolescents spend most ... -
Exploring the association between cannabis use, depression, anxiety and flourishing in youth: a cross-sectional analysis from year 5 of the COMPASS Mental Health pilot data
(University of Waterloo, 2018-04-30)Cannabis use and mental health problems are highly prevalent among Canadian youth. While repercussions associated with cannabis are ubiquitous throughout the population, youth are at an increased risk as the brain is ... -
A longitudinal examination of the associations between cannabis use, physical activity, and CSEP guideline achievement among youth in the COMPASS study
(University of Waterloo, 2020-12-15)Background: There is a lack of conclusive longitudinal literature regarding cannabis use frequency and physical activity in Canadian youth. While it is documented that rates of physical activity are decreasing and cannabis ... -
Modifiable behavioural factors and their association with depression and anxiety in Canadian undergraduate post-secondary students
(University of Waterloo, 2024-04-30)Background: The mental health of post-secondary students is important for academic success and overall wellness. If post-secondary students are struggling with mental health concerns, these concerns can affect various ... -
Multi-level analysis of school characteristics, based on the Comprehensive School Health Framework, associated with physical activity in a large sample of Ontario and Alberta secondary school students
(University of Waterloo, 2021-12-20)Physical activity (PA) has many physical and mental health benefits, but only 24.4% of youth achieve the recommended minutes of moderate-to-vigorous PA (MVPA). Schools are an important context for changing modifiable health ... -
Predicting Overweight and Obesity Among Youth in Ontario, Canada: Evidence from Cross-sectional and Longitudinal Analyses
(University of Waterloo, 2017-09-13)The percentage of Canadian children and adolescents that are overweight or obese has increased dramatically since the 1980s, with approximately 25% of youth in Canada now characterised as overweight or obese. Canadian youth ... -
Tanning Attitudes That Predict the Prevalence and Frequency of Tanning bed use in Older Adolescents and Young Adults in Canada
(University of Waterloo, 2016-06-09)Background: Tanning bed use is a modifiable risk factor in the development of melanoma skin cancer. Despite the increased risk of skin cancer, tanning bed use is most common among the adolescent and young adult population. ... -
Understanding youth tobacco and nicotine product use: Exploring susceptibility to, use of, and trajectories for six tobacco and nicotine products
(University of Waterloo, 2018-08-31)One of the greatest accomplishments of public health has been the significant reductions in harms due to smoking. Although tobacco cigarettes have typically been the product with the highest prevalence of use, there remains ... -
Understanding Youth Trajectories of Alcohol Use: Evaluating the Impact of a Policy of Authorizing Alcohol Sales in Some Grocery Stores in Ontario
(University of Waterloo, 2019-08-29)The latest change in the policy of the Liquor Control Board of Ontario (LCBO), enacted in December 2015, authorizes the sale of alcohol in 450 grocery stores that previously had not sold alcohol. This policy change increased ... -
Using Decision Trees to Examine the Influence of the School Environment on Youth Mental Health
(University of Waterloo, 2022-12-22)Youth mental health is a current public health priority in Canada, with nearly one in four young people living with a mental illness. The contextual school environment can be particularly influential given the considerable ...