Orden S R, Dyer A R, Liu K
Department of Community Health and Preventive Medicine, Northwestern University Medical School, Chicago, Illinois 60611.
Am J Prev Med. 1990 May-Jun;6(3):176-82.
The recruitment goal of Chicago Coronary Artery Risk Development in Young Adults (CARDIA) was 1,100 randomly selected young adults, in equal proportions for men and women, blacks and whites, two age groups, and two education groups. CARDIA is an ongoing multicenter study of the health and lifestyles of young adults designed to trace the development of risk factors for coronary heart disease over time. Participants completed a four-and-one-half hour exam and agreed to return two years later. In Chicago CARDIA, one of the four centers in the national collaborative study, random digit dialing of computer-generated telephone lists was the initial recruitment technique. Initial recruitment efforts resulted in too few low-socioeconomic status (SES) white participants and too few blacks. In response the sampling procedure was modified to focus on census tracts with a high density of blacks, more low-SES whites, and convenient public transportation. By being flexible, Chicago CARDIA improved recruitment in certain hard-to-fill cells and achieved the overall goals: 1,109 participants, 50% black and 50% white, near equal proportions by sex and age, and close to the recommended 40%/60% spread on education. The Chicago experience should benefit others conducting research in an urban setting.
芝加哥年轻成人冠状动脉风险发展研究（CARDIA）的招募目标是随机选取1100名年轻成人，男女、黑人和白人、两个年龄组以及两个教育程度组的人数比例相等。CARDIA是一项正在进行的多中心研究，旨在追踪年轻成人的健康状况和生活方式，以及随着时间推移冠心病危险因素的发展情况。参与者完成了一次长达四个半小时的检查，并同意两年后再次返回。在芝加哥CARDIA（全国合作研究的四个中心之一），最初的招募技术是对计算机生成的电话列表进行随机数字拨号。最初的招募工作导致社会经济地位较低（SES）的白人参与者过少，黑人参与者也过少。作为回应，抽样程序进行了修改，重点关注黑人密度高、社会经济地位较低的白人较多且公共交通便利的普查区。通过保持灵活性，芝加哥CARDIA改善了某些难以招募到参与者的分组的招募情况，并实现了总体目标：1109名参与者，50%为黑人，50%为白人，按性别和年龄的比例接近相等，教育程度分布接近推荐的40%/60%。芝加哥的经验应该会让其他在城市环境中开展研究的人受益。
