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Estimates

The data presented in this report are weighted estimates, unless otherwise noted. The survey weights assigned by Statistics Canada in the annual Canadian Tobacco Use Monitoring Survey (CTUMS) and Canadian Tobacco Use Monitoring Survey (CTADS) datasets were used for the CTUMS/CTADS analyses, and Youth Smoking Survey (YSS) survey weights were used for YSS analyses; CTUMS/CTADS and YSS were not analysed together and there was no overlap of the survey weights between the two surveys. Estimates for categorical measures were generated using the SURVEYFREQ procedure in the Statistical Analysis System (SAS; Version 9.4), while estimates for continuous variables (e.g., cigarettes per day) were generated using the SURVEYMEANS procedure in SAS. Estimates and confidence intervals were generated using the statistical software STATA 10.1 using the bootstrap weights where they were available (CTADS 2013, CTUMS 2001 to 2012, and YSS 2004-05 to 2012-13).

Reporting

Confidence intervals are available as supplementary material on the website, but are not included in this report; caution should be used when making comparisons without first checking the confidence intervals. Estimates are not reported where specific categories included less than 30 individuals (unweighted), except where noted as not meeting Statistics Canada’s quality standards. In addition to this rule, Health Canada also recommends calculating the coefficient of variation to determine the quality level of the estimate (for further information, please refer to the documentation for specific surveys and waves/years). As a result, some estimates included in this report may be reported “with caution” or not reported by Health Canada in their releases.


Rounding

Estimates in figures and the associated data tables have been rounded to one decimal place. Provincial estimates for numbers of smokers reported in Sections 2.1-2.10 have been rounded to the nearest thousand.