Canada's Alcohol and Other Drugs Survey

Detailed information for 1994

The purpose of this survey was to provide data that will be used by Health Canada, the Health Promotion Directorate as well as Researchers for alcohol and other drug use in Canada. Information will be used to inform the decision making and program planning efforts of policy makers, practitioners and researchers.

Data release - November 17, 1995

• Questionnaire(s) and reporting guide(s)
• Description
• Data sources and methodology

Description

The data will be used by Health Canada, the Health Promotion Directorate as well as Researchers for alcohol and other drug use in Canada. Information will be used to inform the decision making and program planning efforts of policy makers, practitioners and researchers.

Subjects

• Health
• Lifestyle and social conditions

Data sources and methodology

Sampling

This is a sample survey with a cross-sectional design.

For each province, lists of telephone numbers in use were purchased from the telephone companies and lists of working banks were extracted. Each bank was assignet to a stratum within its province. A random sample of telephone numbers was generated in each stratum (from working banks). An attempt was made to generate the entire sample of telephone numbers on the first day of interviewing. Therefore, a prediction of the percentagle of numbers dialled that would reach a household had to be made (this is known as the "hit rate"). The hit rate was estimated using information from previous RDD surveys, specifically the General Social Survey, Cycle 8. For this survey, 46.1% of the numbers dialled reached households. An attempt was made to conduct a CADS interview with one randomly selected person from each household.

Disclosure control

Statistics Canada is prohibited by law from releasing any information it collects that could identify any person, business, or organization, unless consent has been given by the respondent or as permitted by the Statistics Act. Various confidentiality rules are applied to all data that are released or published to prevent the publication or disclosure of any information deemed confidential. If necessary, data are suppressed to prevent direct or residual disclosure of identifiable data.

In order to prevent any data disclosure, confidentiality analysis is done using the Statistics Canada Generalized Disclosure Control System (G-Confid). G-Confid is used for primary suppression (direct disclosure) as well as for secondary suppression (residual disclosure). Direct disclosure occurs when the value in a tabulation cell is composed of or dominated by few enterprises while residual disclosure occurs when confidential information can be derived indirectly by piecing together information from different sources or data series.