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Using collaterals to validate self-reports of problem drinkers: any impact on client attrition and quantity of
John A Cunningham1, T Cameron Wild, Joanne Cordingley
1Centre for Addiction and Mental Health, Toronto, Ontario, Canada. John_Cunningham@camh.net
Objective:
To explore the impact of asking for a collateral on respondent attrition and the impact of providing versus not providing a collateral on self-reported drinking.
Method:
As part of a larger trial assessing the efficacy of self-help materials for problem drinkers, respondents were randomly assigned to be asked or not asked to provide a collateral at the time of their 6-month follow-up.
Results:
While there was no significant impact of client attrition, respondents who were asked for a collateral and provided one reported higher levels of alcohol consumption at the 6-month follow-up as compared to those who were asked for a collateral but did not provide one.
Conclusions:
Providing a collateral may have an impact on respondent's self-reported drinking. Alternate explanations for this finding are discussed.
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