Youth were recruited through elementary and secondary public schools
in Vancouver (British Columbia) over an eight-month period in 2010.
Recruitment was achieved through the use of information flyers for
students to take home (elementary schools) and recruitment booths
with questionnaire packages for students to take home (secondary
schools). The research assistant contacted all parents by telephone to
explain the study, and all subjects signed consent or assent forms. The
University of British Columbia Research Ethics Board (Vancouver,
British Columbia) and the Vancouver School Board approved the
study. Inclusion criteria included being between 11 and 17 years of age,
and the ability to read English for both youth and parent.