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dc.contributor.authorGibbons, C.L.
dc.contributor.authorMangen, M.J.
dc.contributor.authorPlass, D.
dc.contributor.authorHavelaar, A.H.
dc.contributor.authorBrooke, R.J.
dc.contributor.authorKramarz, P.
dc.contributor.authorPeterson, K.L.
dc.contributor.authorStuurman, A.L.
dc.contributor.authorCassini, A.
dc.contributor.authorFèvre, Eric M.
dc.contributor.authorKretzschmar, M.E.E.
dc.date.accessioned2014-02-26T16:02:17Z
dc.date.available2014-02-26T16:02:17Z
dc.date.issued2014-02-11
dc.identifier.citationGibbons, C.L., Mangen, M.J., Plass, D., Havelaar, A.H., Brooke, R.J., Kramarz, P., Peterson, K.L., Stuurman, A.L., Cassini, A., Fèvre, E.M. and Kretzschmar, M.E.E. 2014. Measuring underreporting and under-ascertainment in infectious disease datasets: a comparison of methods. BMC Public Health 14:147.en_US
dc.identifier.issn1471-2458en_US
dc.identifier.urihttp://hdl.handle.net/10568/35035
dc.description.abstractBackground Efficient and reliable surveillance and notification systems are vital for monitoring public health and disease outbreaks. However, most surveillance and notification systems are affected by a degree of underestimation (UE) and therefore uncertainty surrounds the 'true' incidence of disease affecting morbidity and mortality rates. Surveillance systems fail to capture cases at two distinct levels of the surveillance pyramid: from the community since not all cases seek healthcare (under-ascertainment), and at the healthcare-level, representing a failure to adequately report symptomatic cases that have sought medical advice (underreporting). There are several methods to estimate the extent of under-ascertainment and underreporting. Methods Within the context of the ECDC-funded Burden of Communicable Diseases in Europe (BCoDE)-project, an extensive literature review was conducted to identify studies that estimate ascertainment or reporting rates for salmonellosis and campylobacteriosis in European Union Member States (MS) plus European Free Trade Area (EFTA) countries Iceland, Norway and Switzerland and four other OECD countries (USA, Canada, Australia and Japan). Multiplication factors (MFs), a measure of the magnitude of underestimation, were taken directly from the literature or derived (where the proportion of underestimated, under-ascertained, or underreported cases was known) and compared for the two pathogens. Results MFs varied between and within diseases and countries, representing a need to carefully select the most appropriate MFs and methods for calculating them. The most appropriate MFs are often disease-, country-, age-, and sex-specific. Conclusions When routine data are used to make decisions on resource allocation or to estimate epidemiological parameters in populations, it becomes important to understand when, where and to what extent these data represent the true picture of disease, and in some instances (such as priority setting) it is necessary to adjust for underestimation. MFs can be used to adjust notification and surveillance data to provide more realistic estimates of incidence.en_US
dc.language.isoenen_US
dc.sourceBMC Public Healthen_US
dc.subjectDISEASE CONTROLen_US
dc.subjectEPIDEMIOLOGYen_US
dc.titleMeasuring underreporting and under-ascertainment in infectious disease datasets: A comparison of methodsen_US
dc.typeJournal Articleen_US
cg.subject.ilriDISEASE CONTROLen_US
cg.subject.ilriEPIDEMIOLOGYen_US
cg.subject.ilriRESEARCHen_US
cg.identifier.statusOpen Accessen_US
cg.identifier.doihttps://dx.doi.org/10.1186/1471-2458-14-147en_US
cg.isijournalISI Journalen_US
cg.contributor.crpAgriculture for Nutrition and Health


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