title: Health behaviours associated with indoor tanning based on the 2012/13 Manitoba Youth Health Survey.
abstract: BACKGROUND
  Although indoor tanning causes cancer, it remains relatively common among adolescents. Little is known about indoor tanning prevalence and habits in Canada, and even less about associated behaviours. This study explores the prevalence of adolescent indoor tanning in Manitoba and its association with other demographic characteristics and health behaviours.
  
  
  METHODS
  We conducted secondary analyses of the 2012/13 Manitoba Youth Health Survey data collected from Grade 7 to 12 students (n = 64 174) and examined associations between indoor tanning (whether participants had ever used artificial tanning equipment) and 25 variables. Variables with statistically significant associations to indoor tanning were tested for collinearity and grouped based on strong associations. For each group of highly associated variables, the variable with the greatest effect upon indoor tanning was placed into the final logistic regression model. Separate analyses were conducted for males and females to better understand sex-based differences, and analyses were adjusted for age.
  
  
  RESULTS
  Overall, 4% of male and 9% of female students reported indoor tanning, and prevalence increased with age. Relationships between indoor tanning and other variables were similar for male and female students. Binary logistic regression models indicated that several variables significantly predicted indoor tanning, including having part-time work, being physically active, engaging in various risk behaviours such as driving after drinking for males and unplanned sex after alcohol/drugs for females, experiencing someone say something bad about one's body shape/size/appearance, identifying as trans or with another gender, consuming creatine/other supplements and, for females only, never/rarely using sun protection.
  
  
  CONCLUSIONS
  Indoor tanning among adolescents was associated with age, part-time work, physical activity and many consumption behaviours and lifestyle risk factors. Though legislation prohibiting adolescent indoor tanning is critical, health promotion to discourage indoor tanning may be most beneficial if it also addresses these associated factors.
authors.affiliation: Epidemiology and Cancer Registry, CancerCare Manitoba, Winnipeg, Manitoba, Canada.
authors.forename: E
authors.initials: E
authors.lastname: Harland
authors.affiliation: Department of Community Health Sciences, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.
authors.forename: J
authors.initials: J
authors.lastname: Griffith
authors.affiliation: Epidemiology and Cancer Registry, CancerCare Manitoba, Winnipeg, Manitoba, Canada.
authors.forename: H
authors.initials: H
authors.lastname: Lu
authors.affiliation: Epidemiology and Cancer Registry, CancerCare Manitoba, Winnipeg, Manitoba, Canada.
authors.forename: T
authors.initials: T
authors.lastname: Erickson
authors.affiliation: Epidemiology and Cancer Registry, CancerCare Manitoba, Winnipeg, Manitoba, Canada.
authors.forename: K
authors.initials: K
authors.lastname: Magsino
mesh_terms: D000293:Adolescent; D000367:Age Factors; D005260:Female; D015438:Health Behavior; D006293:Health Promotion; D006306:Health Surveys; D006801:Humans; D008019:Life Style; D008297:Male; D008350:Manitoba / Q000453:epidemiology; D015995:Prevalence; D012307:Risk Factors; D012737:Sex Factors; D055108:Sunbathing / Q000523:psychology / Q000706:statistics & numerical data
keywords: Canada; UV exposure; adolescents; indoor tanning; risk factors; skin cancer; students; youth