Comparison of the sociodemographic characteristics of the large NutriNet-Sante e-cohort with French Census data: the issue of volunteer bias revisited
Comparison of the sociodemographic characteristics of the large NutriNet-Sante e-cohort with French Census data: the issue of volunteer bias revisited
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DOI：
10.1136/jech-2014-205263
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发表时间：
2015-09-01
影响因子：
6.3
通讯作者：
Hercberg, Serge
中科院分区：
文献类型：
--
作者：
Andreeva, Valentina A.;Salanave, Benoit;Hercberg, Serge
背景在传统和基于网络的研究中，一个反复出现的问题是由于志愿者偏见而导致的非代表性。我们调查了这个问题，在一个正在进行的，大规模的人口为基础的e-cohol.Methods样本包括122 912个人参加了基于互联网的，营养为重点的NutriNet桑特研究2009年5月至2014年3月，完整的基线数据。参与者是通过经常性的多媒体运动和其他传统和在线战略招募的。年龄在18岁以上、居住在法国并能上网的个人有资格参加。他们的社会人口学特征与相应的2009年人口普查数据进行了比较，通过卡方（2）拟合优度检验。统计加权的e-队列data.Results的有效性进行了探讨，样本表现出显着的地理和社会人口的多样性，包括志愿者属于典型的代表性不足的亚组在传统的调查（失业，移民，老年人）。尽管如此，与相应的全国数字相比，妇女、受过相对良好教育的个人以及已婚或同居者的比例明显更高（女性：78.0%对52.4%;大专学历：61.5%对24.9%;已婚或同居：70.8%对62.0%;所有p< 0.0001）。结论法国普通人群和基于普通人群的e队列之间存在显著的社会人口学差异，其中一些通过统计加权进行了校正。研究结果承担在电子流行病学的背景下，未来的调查的潜在普遍性。
Background A recurring concern in traditional and in Web-based studies pertains to non-representativeness due to volunteer bias. We investigated this issue in an ongoing, large population-based e-cohort.Methods The sample included 122 912 individuals enrolled in the Internet-based, nutrition-focused NutriNet-Sante study between May 2009 and March 2014, with complete baseline data. Participants were recruited via recurrent multimedia campaigns and other traditional and online strategies. Individuals aged 18+ years, residing in France and having Internet access, were eligible for enrolment. Their sociodemographic characteristics were compared with the corresponding 2009 Census data via chi(2) goodness-of-fit tests. The effectiveness of statistical weighting of the e-cohort data was also explored.Results The sample exhibited marked geographical and sociodemographic diversity, including volunteers belonging to typically under-represented subgroups in traditional surveys (unemployed, immigrants, the elderly). Nonetheless, the proportions of women, relatively well-educated individuals and those who are married or cohabiting, were notably larger compared with the corresponding national figures (women: 78.0% vs 52.4%; postsecondary education: 61.5% vs 24.9%; married or cohabiting: 70.8% vs 62.0%, respectively; all p< 0.0001).Conclusions There were notable sociodemographic differences between the general French population and this general population-based e-cohort, some of which were corrected by statistical weighting. The findings bear on the potential generalisability of future investigations in the context of e-epidemiology.