A grad student here is working with the CCHS 2009-2010 and the CCHS 2010 files. The documentation appears to indicate that the respondents from CCHS 2010 make up about half of the respondents in the CCHS 2009-2010, i.e. that the same 2010 respondents are in both files and that these are not two totally distinct groups? However, the student has asked me to confirm this with Statistics Canada, as it is “critical” to his dissertation.
I consulted the subject matter division responsible and they provided the following response.
“The same respondent cases that appear in the annual CCHS (2010) will also appear in the biannual CCHS file (2009-2010)”