Data and Surveillance - Community Response
The Importance of Reporting Clusters
A cluster is defined as being more than the expected number of cases of a birth defect in a population group for a defined geographic area and for a specific period. There are scientific and public health reasons for investigating suspected clusters. First, cluster investigations can generate new clues about causes of birth defects. Because most birth defects cannot be explained, generating ideas about possible causes is essential. Also, cluster investigations can allay community concerns. When an investigation shows no increased risk, the public is reassured. Other times, the investigation may not find a cause, but it may rule out environmental concerns, such as tainted wells, factory emissions and hazardous waste sites.
One goal of CBDMP is to respond efficiently and effectively to reported birth defect health outcomes.Concerned parents, news reporters and public officials understand their environments better than anyone else. Community members have helped in cluster investigations by soliciting the cooperation of other parents, researching exposures and providing historical knowledge about relevant local events.A health professional may be the first to notice a possible cluster due to interactions with patients.When profiling local health data or monitoring environmental conditions, the health department may look at birth defects as one indicator of public health. Everyone can play an instrumental role in linking birth defects with causal exposures.
For more information about clusters or to report a cluster, please contact CBDMP.