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Surveillance for fetal alcohol syndrome using multiple sources -- Atlanta, Georgia, 1981-1989
Insights
Fetal alcohol syndrome (FAS) surveillance is challenging as diagnosis often occurs late. This study introduces a linked data method for more accurate FAS prevalence estimates in a defined population.
Area of Science:
- Public Health
- Epidemiology
- Pediatrics
Background:
- Fetal alcohol syndrome (FAS) results from prenatal alcohol exposure, causing facial anomalies, growth deficits, and CNS abnormalities.
- Accurate surveillance of FAS is crucial for understanding its magnitude and trends, but diagnosis is often delayed.
- Current surveillance methods, often based on newborn diagnoses, miss many cases diagnosed later in childhood.
Purpose of the Study:
- To develop and evaluate a more accurate, multiple-source method for population-based fetal alcohol syndrome surveillance.
- To improve the estimation of FAS prevalence by linking existing surveillance data.
- To enable more reliable comparisons of FAS rates between different populations or states.
Main Methods:
- Linked data from the Metropolitan Atlanta Congenital Defects Program (MACDP) and Metropolitan Atlanta Developmental Disabilities Surveillance Program (MADDSP).
- Analysis focused on children born in Atlanta between 1981-1989, utilizing data available for ages 3-10 years.
- A multiple-source surveillance approach was implemented to capture a more complete picture of FAS cases.
Main Results:
- Most (89%) cases of full or partial FAS are diagnosed after age 6.
- Linking surveillance data provided a more comprehensive estimate of FAS prevalence compared to single-source methods.
- The developed method allows for comparisons of FAS rates across different geographic areas.
Conclusions:
- A multiple-source data linkage method enhances the accuracy and completeness of fetal alcohol syndrome surveillance.
- This approach addresses limitations of traditional newborn-focused surveillance, capturing later-diagnosed cases.
- Improved surveillance methods are essential for monitoring FAS trends and informing public health interventions.
Abstract:
Fetal alcohol syndrome (FAS) is caused by heavy alcohol consumption during pregnancy and is characterized by specific anomalies of the face; prenatal and postnatal growth deficits; and a variety of central nervous system (CNS) abnormalities, including mental retardation. Children with either full or partial FAS often incur severe and costly secondary disabilities. Despite the importance of surveillance for establishing the magnitude of FAS and in monitoring trends in the occurrence of this disease, population-based surveillance for FAS has been difficult because the syndrome can be diagnosed only by clinical observation and often is not recognized until after the child reaches school age. Although most FAS surveillance has been based on diagnoses among newborns, most (89%) cases (full FAS and partial FAS) are diagnosed after the age of 6 years. To develop a more accurate estimate of the prevalence of FAS in a defined population, in 1997 CDC linked data from the Metropolitan Atlanta Congenital Defects Program (MACDP) and the Metropolitan Atlanta Developmental Disabilities Surveillance Program (MADDSP) for children born in Atlanta during 1981-1989 (the most recent birth year for which data were available for 3-10-year-olds). This report presents a multiple-source method for FAS surveillance that is more complete than previous methods and that enables comparison of rates between states.