Andrea Flynn1, Paul F Tremblay2, Jürgen Rehm3, Samantha Wells4. 1. Centre for Addiction and Mental Health (CAMH), London, Canada. 2. Department of Psychology, Western University, London, Canada. 3. Centre for Addiction and Mental Health (CAMH), Toronto, Canada; Dalla Lana School of Public Health, University of Toronto, Toronto, Canada; Epidemiological Research Unit, Institute for Clinical Psychology and Psychotherapy, Dresden, Germany. 4. Centre for Addiction and Mental Health (CAMH), London, Canada; Dalla Lana School of Public Health, University of Toronto, Toronto, Canada; Department of Epidemiology and Biostatistics, Western University, London, Canada.
Abstract
AIMS: To describe a modified "random walk" door-to-door recruitment strategy used to obtain a random community sample for participation in a study relating to mental health, substance use, addiction, and violence (MSAV) problems and involving the collection of both self-report and biological (hair and saliva) data. This paper describes study protocols, response rates for the study and for the provision of biological data, and possible further applications for this data collection method. DESIGN: A two-stage cluster sample was derived from the 2006 Canadian census sampling frame for a small Ontario community, based on the random selection of city blocks as the primary sampling units and households as the secondary sampling units. SETTING: A small city in Ontario, Canada. PARTICIPANTS: A general population sample of 92 participants selected randomly from households using Kish tables. MEASURES: A computerized questionnaire was administered to obtain self-report data on MSAV problems. Saliva was collected to study genetic vulnerabilities to MSAV problems, and hair was collected to examine stress levels (via the hormone cortisol) as they relate to MSAV problems. FINDINGS: The study showed a response rate of 50% and a high rate of provision of biological samples (over 95%). CONCLUSIONS: Modified random walk methodologies involving face-to-face recruitment may represent a useful approach for obtaining general population samples for studies of MSAV problems, particularly those involving the collection of biological samples. Further studies are needed to assess whether this approach leads to better response rates and improved estimates compared to other survey methods used in research on substance use.
AIMS: To describe a modified "random walk" door-to-door recruitment strategy used to obtain a random community sample for participation in a study relating to mental health, substance use, addiction, and violence (MSAV) problems and involving the collection of both self-report and biological (hair and saliva) data. This paper describes study protocols, response rates for the study and for the provision of biological data, and possible further applications for this data collection method. DESIGN: A two-stage cluster sample was derived from the 2006 Canadian census sampling frame for a small Ontario community, based on the random selection of city blocks as the primary sampling units and households as the secondary sampling units. SETTING: A small city in Ontario, Canada. PARTICIPANTS: A general population sample of 92 participants selected randomly from households using Kish tables. MEASURES: A computerized questionnaire was administered to obtain self-report data on MSAV problems. Saliva was collected to study genetic vulnerabilities to MSAV problems, and hair was collected to examine stress levels (via the hormone cortisol) as they relate to MSAV problems. FINDINGS: The study showed a response rate of 50% and a high rate of provision of biological samples (over 95%). CONCLUSIONS: Modified random walk methodologies involving face-to-face recruitment may represent a useful approach for obtaining general population samples for studies of MSAV problems, particularly those involving the collection of biological samples. Further studies are needed to assess whether this approach leads to better response rates and improved estimates compared to other survey methods used in research on substance use.
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