July 9, 2010 -- Obesity is a major contributor to acid reflux disease in adults, and it appears the same is true in children.
Obese children had a 30% to 40% higher risk of having acid reflux disease than normal-weight children in a new study conducted by researchers with the health management group Kaiser Permanente.
It is among the largest studies to examine the impact of obesity on acid reflux disease in children.
“Childhood obesity is an extremely serious issue,” Kaiser research scientist Corinna Koebnick, PhD, tells WebMD. “Our study adds yet another risk to the already extensive list of risks associated with extreme obesity in childhood.”
Known medically as gastroesophageal reflux disease, or GERD, the condition occurs when stomach contents back up into the esophagus. GERD can damage the esophagus and increase risk for esophageal cancer in adults.
Childhood obesity has more than tripled in the U.S. over the past three decades, according to the CDC.
Eight percent to 25% of children have frequent symptoms of reflux disease, Koebnick says. But the impact of the childhood obesity epidemic on the condition has not been well understood.
In an effort to address this, Koebnick and colleagues analyzed the electronic medical records of more than 690,000 children and teens enrolled in the Kaiser Permanente Southern California health plan in 2007 and 2008.
They found that in children aged 6 and older and in teens, but not in younger children, moderate and extreme obesity was associated with a statistically significant increase in reflux disease risk.
Reflux disease is common among infants, but obesity is not believed to play a role in infant GERD. The latest findings suggest that obesity is also not a major contributor to acid reflux disease in children younger than 6.
In older children and in teens, extreme obesity was associated with up to a 40% increase in GERD risk and moderate obesity was associated with up to a 30% increase in risk.