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Estimates in this article are based on data from the 2005, 2003 and 2000/01 Canadian Community Health Survey (CCHS), conducted by Statistics Canada. The CCHS covers the population aged 12 or older living in private households. It does not include residents of Indian reserves, institutions, and some remote areas; full-time members of the Canadian Armed Forces; and civilian residents of military bases.
The first cycle (1.1) of the CCHS began in September 2000 and continued over 14 months. The response rate was 84.7%, yielding a sample of 131,535 respondents. Cycle 2.1 began in January 2003 and ended in December that year. The response rate was 80.6%, which yielded a sample of 135,573 respondents. Cycle 3.1 was conducted between January and December 2005. The response rate was 79%; sample size, 132,947 respondents. A description of the CCHS methodology is available in a published report.6
All estimates in this article were weighted to represent the household population aged 12 or older in 2005, 2003, or 2000/01. Differences between estimates were tested to ensure statistical significance, which was established at the 0.05 level. To account for the survey design effect, standard errors and coefficients of variation were estimated using the bootstrap technique.7,8
