CHICAGO – The prevalence of erosive esophagitis and Barrett’s esophagus is comparable in individuals regardless of whether they have gastroesophageal reflux symptoms, according to a population-based study.
"These results directly challenge the established GERD-based Barrett’s esophagus screening paradigm and provide strong rationale for using central obesity in Caucasian males with or without symptomatic GERD as criteria for Barrett’s esophagus screening," Dr. Nicholas R. Crews said at the annual Digestive Disease Week.
"In this study, waist-hip ratio was our surrogate marker for central obesity. It’s easily obtainable and usable in clinical practice," noted Dr. Crews of the Mayo Clinic in Rochester, Minn.
Dr. Nicholas R. Crews
Barrett’s esophagus is the precursor lesion and principal risk factor for esophageal adenocarcinoma, a malignancy whose incidence in the United States and other developed nations is increasing at an alarming rate. Improved methods of screening for esophageal adenocarcinoma are sorely needed, he added.
Dr. Crews presented a study in which a representative sample of Olmsted County, Minn., residents over age 50 with no history of endoscopy were randomized to screening for Barrett’s esophagus by one of three methods: sedated endoscopy in the GI suite, unsedated transnasal endoscopy in the clinic, or unsedated transnasal endoscopy in a Mayo mobile research van.
Participants’ mean age was 70 years, 46% were men, 206 of the 209 were white, and only one-third of subjects had GERD symptoms.
The prevalence of esophagitis grades A-C proved to be 32% in the symptomatic GERD group and similar at 29% in those without GERD symptoms. Similarly, Barrett’s esophagus was identified in 8.7% of the symptomatic GERD group and 7.9% of subjects without GERD symptoms. Dysplasia was present in 1.4% of each group. The mean length of the esophageal segment with Barrett’s esophagus was 2.4 cm in patients with GERD symptoms and not significantly different in those who were asymptomatic.
Three risk factors proved significant as predictors of esophageal injury as defined by esophagitis or Barrett’s esophagus: male sex, central obesity as defined by a waist-hip ratio greater than 0.9, and consumption of more than two alcoholic drinks per day. Age, smoking status, and body mass index were not predictive.
The mean waist-to-hip ratio was 0.89 in screened subjects with no esophagitis or Barrett’s esophagus, 0.91 in those with positive endoscopic findings and symptomatic gastroesophageal reflux, and 0.95 in those with positive findings who were asymptomatic.
Audience members expressed skepticism about the notion of routinely screening for Barrett’s esophagus in individuals with central obesity in an era of an unprecedented obesity epidemic.
For example, Dr. Joel E. Richter, who described himself as "an anti-Barrett’s person," commented that he believes gastroenterologists are already overdiagnosing and overtreating the condition, needlessly alarming many patients.
In women, particularly, it’s increasingly clear that Barrett’s esophagus only rarely develops into esophageal adenocarcinoma, he said.
"Others have said that women with Barrett’s esophagus are as likely to get esophageal cancer as men are to get breast cancer," commented Dr. Richter, professor of internal medicine and director of the center for swallowing disorders at the University of South Florida, Tampa.
Another audience member told Dr. Crews, "I totally agree with you that we miss most people with Barrett’s by our current screening process. The problem is, it’s unclear whether it’s important or not to find them. To extrapolate from your study and say that anyone with central obesity ought to be screened for [Barrett’s esophagus] is a little strong, I think."
"It’s very controversial," Dr. Crews agreed. "It’s something we continue to struggle with."
He reported having no relevant financial conflicts.