• There is no evidence of erosive esophagitis in endoscopy
• It accounts for 70% of GERD cases
• It is more common in women
• It is more common in young people
• Dysmotility/dyspeptic symptoms are observed in 50% of NERD cases

Functional Heartburn

• Typical reflux symptoms
• All diagnostic methods are insufficient
• Signs of acid-related mucosal damage are negative
• It accounts for 40% of NERD cases