Effects of recruitment strategy on response rates and risk factor profile in two cardiovascular surveys
Effects of recruitment strategy on response rates and risk factor profile in two cardiovascular surveys
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DOI：
10.1093/ije/25.4.763
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发表时间：
1996-08-01
影响因子：
7.7
通讯作者：
Wolf, HK
中科院分区：
文献类型：
--
作者：
Eastwood, BJ;Gregor, RD;Wolf, HK
背景资料。这项研究旨在评估招募方式对参与率、反应偏差和心血管危险因素估计的影响。哈利法克斯县的两名年龄在25-74岁之间的男性和女性随机从同一抽样框架中抽取。他们的体型分别为1007人(NSHHS)和3036人(Monica)。新斯科舍心脏健康调查(NSHHS)通过面对面的接触进行招募，而莫尼卡的调查依赖于邮寄邀请。结果衡量指标是招募过程不同阶段的应答率和心血管危险因素估计的差异。面对面招聘和邮寄招聘分别占样本的51%和47%；面对面招聘导致拒绝参与调查的个人减少，但除了回答问卷外，准备提供血样的人也减少了。通过邮件招募的新兵更有可能接受过高等教育，但如果控制教育水平、性别和年龄，在吸烟者比例、平均舒张压或体重指数方面没有差异。而面对面招聘的平均收缩压偏高5.7 mm Hg，平均胆固醇水平偏低0.44 mm ol/L。控制年龄、性别和教育水平可以消除招募偏差对大多数心血管危险因素估计的影响。我们研究中的例外是收缩压和胆固醇，方法学因素可能起到了作用。
Background. The study was set up to assess the effect of recruitment methods on participation rate, response bias and cardiovascular risk factor estimates.Methods. Two random samples of men and women in Halifax County aged 25-74 were drawn from the same sampling frame. Their respective sizes were 1007 (NSHHS) and 3036 (MONICA) people. Recruitment by Nova Scotia Heart Health Survey (NSHHS) was through face-to-face contact, whereas the MONICA survey relied on invitation by mail. Outcome measures were response rates at various stages of the recruitment process and the differences in cardiovascular risk factor estimates.Results. Face-to-face recruitment located 51% and mail recruitment located 47% of their respective samples; face-to-face recruitment resulted in fewer individuals who refused to participate in the survey, but also produced fewer who were prepared to provide blood samples in addition to answering questionnaires. By-mail recruits were more likely to have post-secondary education, but did not differ in the proportion of smokers, mean diastolic blood pressure or body mass index, if controlled for education level, gender and age. However, the mean systolic blood pressure was 5.7 mmHg higher and the mean cholesterol level 0.44 mmol/l lower in face-to-face recruits.Conclusions. Controlling for age, gender and education level eliminates the effect of recruitment bias on most cardiovascular risk factors estimates. The exceptions in our study were systolic blood pressure and cholesterol, where methodological factors may have played a role.