Tobacco Use in Canada
Patterns and Trends - 2015 Edition

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Analysis

The data presented in this report are weighted estimates, generated using SAS 9.3 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 9.4. 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 Vicki Rynard, MSc, and Robin Burkhalter, MMath, of the Propel Centre for Population Health Impact, using datasets made available by Statistics Canada and Health Canada. We are grateful to Rashid Ahmed for statistical contributions to previous editions. Statistical guidance for previous editions 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.

This report and the views expressed herein do not necessarily reflect the views or opinions of Statistics Canada or Health Canada.

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