Het nut van een vervolgonderzoek aan non-responders
dc.contributor.author | Hoogenveen RT | |
dc.contributor.author | Hoekstra JA | |
dc.date.accessioned | 2014-01-17T14:04:03 | |
dc.date.issued | 1992-09-30 | |
dc.identifier | 149101002 | |
dc.description.abstract | The 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.sponsorship | VHI | |
dc.description.sponsorship | HIGB | |
dc.format.extent | 25 p | |
dc.language.iso | nl | |
dc.publisher | Rijksinstituut voor Volksgezondheid en Milieu RIVM | |
dc.relation.ispartof | RIVM Rapport 149101002 | |
dc.relation.url | http://www.rivm.nl/bibliotheek/rapporten/149101002.html | |
dc.subject | 20 | nl |
dc.subject | gastro-enteritis | nl |
dc.subject | bevolkingsonderzoek | nl |
dc.subject | vragenlijsten | nl |
dc.subject | non-respons | nl |
dc.subject | gastroenteritis | en |
dc.subject | population surveillance | en |
dc.subject | questionaires | en |
dc.title | Het nut van een vervolgonderzoek aan non-responders | nl |
dc.title.alternative | The use of a non-response study in retrospect | en |
dc.type | Report | |
dc.date.updated | 2014-01-17T13:06:20Z | |
html.description.abstract | The 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> |