The Environmental Public Health Tracking (EPHT) Program is the first national effort to create a network to provide the United States with standardized data integrated from multiple hazard, exposure, and health effects information systems. Limited Childhood Blood Lead datasets from the Systematic Tracking of Elevated Lead Levels and Remediation (STELLAR) Database are available on the National EPHT Network and on the Oregon EPHT website at http://www.oregon.gov/DHS/ph/epht. The Oregon EPHT Childhood Blood Lead dataset contains information about children tested for elevated blood lead levels (sex, age, medicaid eligibility and test results). County and state count and percentage data are available for testing conducted after January 2002. Data from the EPHT network may be used to attempt to quantify the magnitude of environmental health problems, detect unusual trends and occurrences, document the distribution and spread of a hazard or health event, identify populations at risk, plan and evaluate protective and preventive measures, facilitate research, and detect the results of changes in health practices. The Oregon EPHT Program is part of a National EPHT Network sponsored by the CDC. The Oregon EPHT Program resides in the Toxicology, Assessment, and Tracking Section of the Office of Environmental Public Heath (OEPH) which is in the Public Health Division of the Department of Human Services (DHS). STELLAR is a software application provided by the CDC to State and local Childhood Lead Poisoning Prevention Programs (CLPPPs) to track medical and environmental activities in lead poisoning cases. The intent of this application is to create an electronic means of storing childhood lead exposures, medical, and laboratory data that the state program receives from labs, providers, clinics, parents, and local health departments.
Two major factors place children at higher risk for lead poisoning, living in poverty and living in older housing (primarily pre-1950). According to the National Health and Nutrition Examination Survey NHANES III, Part 2, poor children were four times as likely to have elevated blood lead levels (EBLLs) as middle income children and eight times as likely as high income children. In the same survey, children living in pre-1946 housing were five times as likely to have EBLLs as children living in housing built after 1973.
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The limited de-identified and aggregated Childhood Blood Lead dataset that is available on the Oregon EPHT website includes the following variables: Sex Age Group Test Results Medicaid Eligible County
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The purpose of the Oregon EPHT Program is to provide scientific information from a web-based network of hazard, exposure, and health effect data to support actions that improve the health of communities. By bringing together, and standardizing, local, state, and national data sources of environmental and health information, scientists, policymakers, and the public will be able to more effectively address fundamental questions about relationships between environmental exposures and health effects.
STELLAR includes names, sex, age, address, blood lead levels and other demographic information. For more information see http://www.cdc.gov/nceh/lead/surv/stellar/stellar.htm
Data is submitted to the CDC on a quarterly and annual (covering previous calendar year) basis and provided to EPHT on an annual basis. Oregon EPHT aggregates the data available on the website by age group, test result range, county, and year. Suppression rules are used to prevent specific data from being used to identify a particular individual. Suppression rules only apply to certain cells depending on time resolution, query and field (sensitive or not). Suppression applies if data are aggregated over less than 3 years (i.e., Most Recent Year OR Annual Trend over years OR Multiple Year Summary with Year Count <3) and the cell contains data from one of the following queries and specific subcategories from the listed fields. For Childhood Blood Lead Data suppression rules are used if the cell contains a measure specific to one of the following subcategories or an aggregate of subcategories less than All (i.e. 'All selected categories' in the output): Medicaid eligibility, and Test Result. If suppression applies, data will not be shown (count, rate, %) for a cell if the count for the cell (or numerator for rate) is less than 11 or the denominator population is less than 51. Rate estimations based on small case counts may be unstable. Independently of the user's selections, rates are flagged if based on a count (numerator) of less than 10.
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When quarterly and calendar year data is submitted to the Centers for Disease Control and Prevention National Childhood Lead Poisoning Database, a series of algorithms and programs check the data for valid values and inconsistencies. These algorithms and programs produce reports indicating data errors. A data quality report along with a data file containing any rejected records are transmitted back to the state program for data editing and corrections.
In Oregon, STELLAR is a database that contains all childhood blood lead tests from 1991 to present. While the focus is children, the file also contains data and information on adults. Information comes from all clinical laboratories known to the Oregon Childhood Lead Poisoning Program.
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In preparation of this data, every effort has been made to offer the most current, correct, complete and clearly expressed information possible. However, some errors in the data and information may exist. In particular, but without limitation, the EPHT Program and the Lead Poisoning Prevention Program disclaim any liability for compilation and typographical errors and accuracy of the information that may be contained in the data and information. The EPHT Program and the Lead Poisoning Prevention Program reserve the right to make changes to the data at any time without notice.
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