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Selection of elderly controls using random digit dialing

Author

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  • Olsen, G.W.
  • Mandel, J.S.

Abstract

The experience of identifying and soliciting elderly male controls, using a nonclustered random digit dialing procedure in a case-control study, is presented. For elderly controls (ages 65-84) 3.5 times more residential telephone numbers were required than for controls encompassing a much broader age range (ages 40-84). This is a function of the proportion of elderly in the population and their lower response to telephone identification. Elderly controls, age 70 and older, also had lower participation rates.

Suggested Citation

  • Olsen, G.W. & Mandel, J.S., 1988. "Selection of elderly controls using random digit dialing," American Journal of Public Health, American Public Health Association, vol. 78(11), pages 1487-1488.
    • Handle: RePEc:aph:ajpbhl:1988:78:11:1487-1488_7
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