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Attrition in prevention research.

W B Hansen, L M Collins, C K Malotte

Journal of Behavioral Medicine

|September 1, 1985

Summary

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Selective attrition in prevention research affects study validity. Substance users, including cigarette smokers and alcohol drinkers, are more likely to drop out, potentially masking program effectiveness.

Area of Science:

Public Health
Psychology
Epidemiology

Background:

Selective attrition can compromise the internal and external validity of longitudinal research.
Understanding attrition patterns is crucial for accurate interpretation of prevention study outcomes.

Purpose of the Study:

To evaluate four methods for testing selective attrition in longitudinal prevention research.
To identify characteristics of participants prone to attrition and assess its impact on study validity.

Main Methods:

Analyzed data from two longitudinal prevention studies.
Assessed differences between dropouts and stayers on pretest substance use, change scores, and attrition rates across experimental conditions.

Main Results:

Related Experiment Videos

Participants who used cigarettes, alcohol, or marijuana were more likely to drop out.
Attrition differences across experimental conditions in one study suggested a potential confounding artifact.

Conclusions:

Selective attrition, particularly among substance users, limits the generalizability of findings.
Standardized reporting and proactive strategies are needed to mitigate attrition bias in prevention research.