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Health screening and random recruitment for cognitive aging research
K J Christensen1, J Moye, R R Armson
1Geriatric Research, Education and Clinical Center, Veterans Affairs Medical Center, Minneapolis, Minnesota 55417.
Psychology and Aging
|June 1, 1992
Summary
Many cognitive aging studies lack health assessments and random recruitment. This study highlights the need for careful subject selection and health screening to ensure representative samples in cognitive aging research.
Area of Science:
- Gerontology
- Neuropsychology
- Cognitive Science
Background:
- Cognitive aging research often lacks structured health assessments and random recruitment methods.
- Subject characteristics can significantly impact the interpretation of cognitive aging findings.
Purpose of the Study:
- To assess the feasibility and impact of health screening in recruiting participants for cognitive aging studies.
- To determine if health screening and random recruitment yield more representative samples.
Main Methods:
- Administered a health screening questionnaire to 315 adults aged 60+ recruited via random digit dialing.
- Excluded subjects with self-reported medical problems that could impair cognition.
- Compared demographic characteristics of screened participants versus nonparticipants.
Main Results:
- 35% of initially recruited subjects were excluded due to self-reported health issues.
- Excluded subjects were older and more likely male, but similar in education.
- Participants who passed screening were younger, better educated, and more likely male than nonparticipants.
Conclusions:
- Rigorous health assessment and subject selection are crucial for interpreting cognitive aging research.
- Random recruitment of the elderly is feasible but may require demographic stratification for representativeness.
- Future cognitive aging studies should prioritize detailed health status evaluation and transparent subject description.