Retrospective validation of a surveillance system for unexplained illness and death: New Haven County, Connecticut.
Kluger M, Sofair A, Heye C, Meek J, Sodhi R, Hadler J. Retrospective validation of a surveillance system for unexplained illness and death: New Haven County, Connecticut. American Journal Of Public Health 2001, 91: 1214-9. PMID: 11499106, PMCID: PMC1446748, DOI: 10.2105/ajph.91.8.1214.Peer-Reviewed Original ResearchConceptsActive prospective surveillanceInfectious causesUnexplained illnessProspective surveillanceRetrospective surveillanceRetrospective validationProspective surveillance systemHospital discharge dataSurveillance systemSuch patientsAnnual incidenceStudy criteriaMedical recordsNew Haven CountyComputerized searchIllnessLess labor-intensive alternativeDeathLabor-intensive alternativePatientsReference populationSurveillanceCauseDischarge dataStudy counties