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Eligible LongROAD participants were 65–79 years old; drove ≥ once/week with a valid license; received primary care at the site’s healthcare system; lacked significant cognitive impairment; spoke English; and primarily drive one car (1996 model or newer) with an empty port for the study GPS device. Potentially-eligible individuals (sampled from healthcare system patients) received letters and subsequent calls. Over 12 months, the sites mailed 18,078 letters. On average, 25% of those reached by phone declined to eligibilty questions; among those giving a reason, being “too busy” or “don’t like research” were most common. Among those screened for eligibility, the most common reasons for ineligibility were not driving (38%) or having an ineligibile residence (26%) or vehicle (17%). Recruitment yield (enrollments per letters mailed) was 9.8% (range: 5.4%-17%). This presentation highlights recruitment challenges and offers strategies to overcome recruitment barriers. |
