Abstract:
:The statistical power of prospective studies on diet in relation to chronic disease risk can be improved by maximizing the variation in true intake levels actually distinguished--or 'predicted'--by dietary questionnaire assessments collected at baseline. This can be achieved by 1) developing a questionnaire method that provides measurements with the smallest possible random errors, thus maximizing the correlation of measured with true habitual intake levels; and 2) increasing the between-person variation in true dietary intake levels when combining multiple cohorts in populations with diverse consumption patterns. The first approach implies that, during the development or selection of the questionnaire method, correlations between measurements and true intake levels can be monitored; the second approach requires adjustment for between-centre differences in over--or underestimation of dietary questionnaire measurements. Besides optimizing the statistical power, it is important that the magnitude of the predicted variation in true intake level is estimated accurately, so as to allow unbiased estimations of relative risks. To meet these various objectives, substudies must be conducted for the 'validation' or 'calibration' of dietary questionnaire assessments, by comparison with additional measurements that have independent sources of error. This paper reviews the methodological considerations underlying the design and implementation of such substudies in the EPIC project, a collaborative multicentre study in nine Western European countries.
journal_name
Int J Epidemioljournal_title
International journal of epidemiologyauthors
Kaaks R,Riboli Edoi
10.1093/ije/26.suppl_1.s15subject
Has Abstractpub_date
1997-01-01 00:00:00pages
S15-25eissn
0300-5771issn
1464-3685journal_volume
26 Suppl 1pub_type
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journal_title:International journal of epidemiology
pub_type: 杂志文章
doi:10.1093/ije/25.4.879
更新日期:1996-08-01 00:00:00
abstract::This case-control study was designed to determine whether males who were exposed to diethylstilboestrol (DES) in utero are at increased risk of testicular cancer. Questionnaires were completed for 79 residents of Connecticut, who were diagnosed with primary cancer of the testes between 1945 and approximately six month...
journal_title:International journal of epidemiology
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journal_title:International journal of epidemiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:
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abstract:BACKGROUND:Prolonged breastfeeding in developing countries is routinely recommended as a valuable and cost-effective public health measure to promote early childhood growth. However, the effects of breastfeeding beyond 12 months are unclear, with some studies showing positive, and some showing negative effects. The rol...
journal_title:International journal of epidemiology
pub_type: 杂志文章
doi:10.1093/ije/27.3.484
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pub_type: 杂志文章
doi:10.1093/ije/21.2.338
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pub_type: 杂志文章
doi:10.1093/ije/22.supplement_2.s36
更新日期:1993-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1093/ije/18.3.498
更新日期:1989-09-01 00:00:00
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pub_type: 杂志文章
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更新日期:1999-08-01 00:00:00
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更新日期:2013-06-01 00:00:00
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pub_type: 杂志文章
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更新日期:1986-03-01 00:00:00
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pub_type: 杂志文章
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更新日期:1997-06-01 00:00:00
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journal_title:International journal of epidemiology
pub_type: 杂志文章
doi:10.1093/ije/21.5.959
更新日期:1992-10-01 00:00:00
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pub_type: 杂志文章
doi:10.1093/ije/25.2.259
更新日期:1996-04-01 00:00:00
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journal_title:International journal of epidemiology
pub_type: 杂志文章
doi:10.1093/ije/18.3.717
更新日期:1989-09-01 00:00:00
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journal_title:International journal of epidemiology
pub_type: 杂志文章
doi:10.1093/ije/13.4.428
更新日期:1984-12-01 00:00:00
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journal_title:International journal of epidemiology
pub_type: 杂志文章
doi:10.1093/ije/26.2.420
更新日期:1997-04-01 00:00:00
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pub_type: 杂志文章
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更新日期:1987-12-01 00:00:00
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journal_title:International journal of epidemiology
pub_type: 杂志文章
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更新日期:2005-08-01 00:00:00
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journal_title:International journal of epidemiology
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1983-09-01 00:00:00
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更新日期:1990-06-01 00:00:00
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更新日期:2019-10-01 00:00:00
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pub_type: 杂志文章,meta分析
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更新日期:2016-10-01 00:00:00
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更新日期:1991-09-01 00:00:00
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更新日期:2018-12-01 00:00:00
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更新日期:1994-04-01 00:00:00
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