The effect of using different reference dates for control exposure measurement on relative risk estimates in a case-control study

dc.contributor.author	Rampey, Alvin H.
dc.contributor.author	Irwin, Kathleen L.
dc.contributor.author	Oberle, Mark W.
dc.contributor.author	Kinchen, Steven
dc.contributor.author	Lee, Nancy C.
dc.contributor.author	Marsden, Anne
dc.contributor.author	Rosero-Bixby, Luis
dc.date.accessioned	2016-07-06T21:04:33Z
dc.date.available	2016-07-06T21:04:33Z
dc.date.issued	1993
dc.identifier.issn	0895-4356
dc.identifier.uri	http://biblioteca.ccp.ucr.ac.cr/handle/123456789/1002
dc.description.abstract	In case-control studies in which case and control enrollment periods are not identical, exposure status for time-dependent variables is often measured relative to a reference date. Using data from a case-control study of the relation between cervical cancer and oral contraceptive (OC) use in which control enrollment began 6 months after the end of case enrollment, we evaluated the effect on odds ratios from using five different reference dates to determine the controls’ exposure status. The choice of reference date had little effect on the odds ratios in this study. Reference dates for time-dependent exposure variables should be considered carefully in studies when case and control enrollment periods are not identical.	es
dc.language.iso	en	es
dc.publisher	Elsevier	es
dc.rights	Atribución-NoComercial-CompartirIgual 3.0 Costa Rica	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-sa/3.0/cr/	*
dc.subject	Estudios de casos	es_ES
dc.subject	Recopilación de datos	es
dc.subject	Probabilidad	es
dc.subject	Cáncer	es
dc.subject	Anticonceptivos orales	es
dc.title	The effect of using different reference dates for control exposure measurement on relative risk estimates in a case-control study	es
dc.title.alternative	Journal of Clinical Epidemiology. 46(5).	es
dc.type	Article	es