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dc.contributor.authorHoogenveen RT
dc.contributor.authorHoekstra JA
dc.date.accessioned2014-01-17T14:04:03
dc.date.issued1992-09-30
dc.identifier149101002
dc.description.abstractThe authors report about a study on the use and possibilities of a non-response study in retrospect. A non-response study is meant to control for systematic differences between responders and non-responders in having some property. If so there is selection bias. The problem investigated is: Which kinds of non-response studies in retrospect are possible and useful and how important are time trends? Three scenarios for non-response studies are investigated. These scenarios lead to three estimators of the fraction of the population having the property. The first scenario is not to perform a non-response study. The first estimator uses only the original information from the responders and doesn't control for selection bias. The second scenario is to perform a study in retrospect on non-responders only. The second estimator controls for selection bias but not for time trends. The third scenario is to perform a study in retrospect on both responders and non-responders. The third estimator controls for selection bias and time trends. It is concluded that a non-response study being performed in the same period as the main study is prefered to a study in retrospect, and that control for selection bias isn't useful in case of an extreme ratio between the numbers of responders and those of re-examined non-responders. Because of this last conclusion it was decided not to perform a non-response study in case of the 1991 gastro-intestinal diseases population study in the Netherlands.<br>
dc.description.sponsorshipVHI
dc.description.sponsorshipHIGB
dc.format.extent25 p
dc.language.isonl
dc.publisherRijksinstituut voor Volksgezondheid en Milieu RIVM
dc.relation.ispartofRIVM Rapport 149101002
dc.relation.urlhttp://www.rivm.nl/bibliotheek/rapporten/149101002.html
dc.subject20nl
dc.subjectgastro-enteritisnl
dc.subjectbevolkingsonderzoeknl
dc.subjectvragenlijstennl
dc.subjectnon-responsnl
dc.subjectgastroenteritisen
dc.subjectpopulation surveillanceen
dc.subjectquestionairesen
dc.titleHet nut van een vervolgonderzoek aan non-respondersnl
dc.title.alternativeThe use of a non-response study in retrospecten
dc.typeReport
dc.date.updated2014-01-17T13:06:20Z
html.description.abstractThe authors report about a study on the use and possibilities of a non-response study in retrospect. A non-response study is meant to control for systematic differences between responders and non-responders in having some property. If so there is selection bias. The problem investigated is: Which kinds of non-response studies in retrospect are possible and useful and how important are time trends? Three scenarios for non-response studies are investigated. These scenarios lead to three estimators of the fraction of the population having the property. The first scenario is not to perform a non-response study. The first estimator uses only the original information from the responders and doesn&apos;t control for selection bias. The second scenario is to perform a study in retrospect on non-responders only. The second estimator controls for selection bias but not for time trends. The third scenario is to perform a study in retrospect on both responders and non-responders. The third estimator controls for selection bias and time trends. It is concluded that a non-response study being performed in the same period as the main study is prefered to a study in retrospect, and that control for selection bias isn&apos;t useful in case of an extreme ratio between the numbers of responders and those of re-examined non-responders. Because of this last conclusion it was decided not to perform a non-response study in case of the 1991 gastro-intestinal diseases population study in the Netherlands.&lt;br&gt;


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