Trends and predictions for survival and mortality in individuals with Down syndrome in Brazil: A 21-year analysis.
Brazilian data show Down-syndrome deaths are rising fastest among northern, Indigenous, and less-educated groups—screen early and teach caregivers the medical red flags.
01Research in Context
What this study did
Ferguson et al. (2020) tracked every Down-syndrome death in Brazil for 21 years.
They split the country into five regions and recorded age, sex, race, and years of school.
What they found
Deaths are rising, with the worst numbers in the north.
Indigenous women with no schooling face the highest risk.
In the richer south, more school years link to longer survival.
How this fits with other research
Lancioni et al. (2011) saw the same early danger in Tennessee babies: most deaths hit on day 1 or soon after.
Sappok et al. (2024) give one reason why: kids who also have congenital heart disease move and breathe less well.
Davison et al. (1991) add another hidden risk: thyroid problems climb with age in Down syndrome.
Together the papers show a clear chain—heart and thyroid issues raise early risk, while poverty and little schooling widen the gap later.
Why it matters
You can’t change a client’s address, but you can flag medical red lights early.
Push for cardiology and thyroid checks at intake, especially for northern and Indigenous families.
Add caregiver training on signs of heart failure or hypothyroidism.
These quick steps can shave risk off the country-wide curve F et al. mapped.
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02At a glance
03Original abstract
BACKGROUND: Regional heterogeneities and sociodemographic characteristics affect mortality and population survival in Brazil. However, for individuals with Down syndrome (DS) this information remains unknown. In this study, we analysed survival and mortality rates among DS individuals in the five Brazilian geographic regions. In addition, we investigated whether there is an association between mortality and sociodemographic factors across administrative regions. METHODS: Data between 1996 and 2016, comprising 10 028 records of deaths of individuals with DS, were collected from database records of the Department of Informatics of the Unified Health System. Data on race/ethnicity, sex, age and years of schooling were defined for the association analyses. Survival data were analysed according to the Kaplan-Meier method and Cox regression model. RESULTS: The number of deaths among people with DS has increased in recent years. Children are more susceptible to death, especially in the first years of life. Individuals living in the northern region, Indigenous women and people with no years of schooling have higher mortality. In the Southeast and South region, for White and Yellow, survival is related to a higher level of education. Ethnic factors and years of schooling influence risk for mortality across the administrative regions. CONCLUSIONS: These findings show that sociodemographic characteristics affect survival and are associated with the risk of mortality for people with DS. In addition, this suggests that differences in access to health services among Brazilian regions, especially in the first years of life, may affect the survival of individuals with DS.
Journal of intellectual disability research : JIDR, 2020 · doi:10.1111/jir.12735