Analysis

The data presented in this report are weighted estimates, generated using SAS 9.2 unless otherwise noted. The CTUMS survey weights assigned by Statistics Canada in the annual datasets were used for CTUMS analyses, and the YSS survey weights were used for YSS analyses. CTUMS and YSS were not analysed together and there was no overlap of the survey weights between the two surveys. Confidence intervals around estimates were calculated in STATA 10.1 using bootstrap weights for the years where bootstrap weight data are available.

Statistical comparisons between groups/years were tested using weighted regression analyses in SAS 9.2. Bootstrap weights were used to perform significance testing where available. Where statistical testing has been performed, comparisons are marked with a superscript number, which refers to a p-value that can be found in the Index of Statistical Tests. Throughout the report, the term “significant” has been reserved for instances where statistical testing has been performed, with p<0.05 as the cut-off for significance.

See Appendix C for further details.

Data analysis was completed by Robin Burkhalter, MMath, under the supervision of Rashid Ahmed, PhD, both of the Propel Centre for Population Health Impact, using datasets made available by Statistics Canada and Health Canada. Statistical review was provided by K. Stephen Brown, PhD, of the Propel Centre for Population Health Impact and the Department of Statistics & Actuarial Science, University of Waterloo.

Please note that unless otherwise stated, all data reported in Sections I and II is for Canadian adults age 15 and over, from the Canadian Tobacco Use Monitoring Survey (CTUMS), and all data reported in Section III is for Canadian youth, grades 6-9 from the Youth Smoking Survey (YSS) and age 15-19 from CTUMS

This report does not necessarily reflect the views or opinions of Statistics Canada or Health Canada.