Fetal Alcohol Syndrome (FAS) in the United States has long been estimated at no more than three children per 1,000. A new study published in the journal of Drug and Alcohol Dependence reports that the prevalence of fetal alcohol syndrome (FAS) is between 3 and 8 per 1,000 and when combined with partial FAS (PFAS) the prevalence of both actually ranges between 11 to 25 children per 1,000.
Lead researcher Philip May, PhD, research professor with the UNC Nutrition Research Institute (NRI) at the NC Research Campus in Kannapolis, NC, emphasized that the study “Prevalence and characteristics of fetal alcohol syndrome and partial fetal alcohol syndrome in Rocky Mountain Region City” is only the second population-based study completed in the United States that aimed to establish more accurate rates of FAS and PFAS.
May was the lead author on the first major population-based study released in October 2014 in the journal Pediatrics. That study was conducted in a Midwestern city and focused on birth defects and fetal alcohol syndrome disorder (FASD). FAS and PFAS, May explains, are the most severe diagnoses along a spectrum of birth defects caused by maternal drinking during pregnancy. Children with FAS and PFAS have abnormal facial features, lifelong learning and behavioral problems because of damage to the developing brain and central nervous system that results in health issues involving hearing, vision, the heart, kidneys and bones.
Benefits of Active Case Ascertainment
May credits the use of active case ascertainment methods in both the Rocky Mountain and Midwestern studies for the reason higher rates of children with FAS and PFAS were discovered. Active case ascertainment places researchers and medical professionals in the schools to evaluate and test children beyond easily visible birth defects.
The Rocky Mountain Study took four years and involved 2,300 first graders in 17 elementary schools. The students were screened for height, weight and head circumference. Children with a head measurement and height and weight below growth standards set by the Centers for Disease Control and Prevention were given a dysmorphology exam by qualified physicians. The children subsequently diagnosed with FAS or PFAS were given additional cognitive and behavioral tests. Randomly selected control samples from the school populations were given identical physical, mental and behavioral tests.
“We do these studies of major developmental disabilities in first grade populations,” May said, “because we can more easily identify a number of developmental challenges through the dysmorphology of the physical features, through the cognition and behaviors that they display and the IQ, executive function and memory tests we give. These disabilities might otherwise go unnoticed or not be identified correctly throughout the school years.”
May finds that clinically based or surveillance study methods capture only 15 to 20 percent of all children with FASD. “When we find severe cases, we find that only one in six have been diagnosed or even referred for diagnosis,” he said. “These children are out there in the mainstream population not performing well, but nobody is sure why. It is important for us to help these study communities understand particular concerns of child development including the whole spectrum of fetal alcohol spectrum disorders (FASD) from extremely mild to extremely severe so that prevention and remediation can start.”
May has studied FASD and some related disabilities since 1979. A large part of his research has focused on South African communities where he has been able to follow children for 15 to 20 years. He and his team, who also work in Europe and different parts of the United States, have found that there are interventions that can improve the prognosis of FASD children.
“We have nutritional and cognitive and behavioral interventions going on in several of the communities we study,” May said. “With help, the brain is able to repair itself in a number of ways and affected children can improve their capabilities significantly.”
No Safe Level
As part of the UNC NRI, an organization developing the field of precision nutrition, May’s research includes a broad range of studies that include understanding the nutritional, genetic and epigenetic factors that influence the risk for a child being born with FASD. But over the decades as May’s research has expanded in focus and global reach, he still comes back to one critical message.
“There is no safe level of alcohol to consume while you are pregnant,” he stressed. “There is too much that is not known about how alcohol affects each individual woman differently during pregnancy to risk it, especially when we know the lifelong impact it can have on an individual child. Furthermore, we now know that more children than previously thought are affected by drinking during pregnancy, so it is important to get the word out as much as possible.”
Learn more about the UNC Chapel Hill Nutrition Research Institute.
Read the recently released report from the American Academy of Pediatrics that “identifies prenatal exposure to alcohol as the leading preventable cause of birth defects and intellectual and neurodevelopmental disabilities in children.”
By Jennifer Woodford, NCRC/DHMRI Media & Communications Manager