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Selection of elderly controls using random digit dialing.

G W Olsen1, J S Mandel

  • 1Epidemiology Department, Dow Chemical Company, Midland, MI 48674.

American Journal of Public Health
|November 1, 1988
PubMed
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Recruiting elderly male controls for case-control studies via random digit dialing requires significantly more phone numbers due to lower response rates in older populations. Older adults, especially those aged 70+, participate less frequently in such research.

Area of Science:

  • Epidemiology
  • Gerontology
  • Public Health Research

Background:

  • Case-control studies are crucial for understanding disease etiology.
  • Recruitment of specific demographic groups, like elderly males, presents unique challenges.
  • Telephone-based recruitment methods are common but may have demographic biases.

Purpose of the Study:

  • To describe the challenges in identifying and recruiting elderly male controls for a case-control study.
  • To quantify the resources needed for recruiting elderly controls using random digit dialing.
  • To assess participation rates among different age strata of elderly individuals.

Main Methods:

  • A nonclustered random digit dialing (RDD) procedure was employed.
  • The study focused on recruiting elderly male controls aged 65-84.

Related Experiment Videos

  • Comparison was made with recruitment for a broader age range (40-84).

    • Main Results:

    • Recruiting elderly male controls (ages 65-84) required 3.5 times more residential telephone numbers compared to a broader age range (40-84).
    • Lower response rates among the elderly population contribute to increased recruitment needs.
    • Individuals aged 70 and older exhibited lower participation rates than younger elderly individuals.

    Conclusions:

    • Telephone-based recruitment of elderly male controls is resource-intensive.
    • The proportion of elderly individuals in the population and their lower response rates significantly impact recruitment efficiency.
    • Targeting older adults (70+) for telephone surveys may yield lower participation rates, necessitating adjusted strategies.