Long-Term Clinical Course after Successful Initial Treatment in Patients with Mild Erosive Esophagitis: A Prospective Follow-Up Study

This study aimed to investigate the clinical course of patients with healed mild erosive esophagitis and clarify the predictive factors for continuous treatment.Fifty-one patients with mild erosive esophagitis who confirmed mucosal healing by endoscopy after initial treatment with vonoprazan (VPZ) were enrolled. The patients continued subsequent treatment of their choice: maintenance therapy with VPZ 10 mg (n = 15), on-demand therapy with VPZ 20 mg (n = 19), or no medication (n = 17). Each patient was prospectively followed up for over 2 years, and the treatment was switched to other options appropriately according to their symptoms.During the mean follow-up period of 3.1 years (range: 2.0-3.9 years), 2 patients who chose maintenance therapy switched to on-demand therapy. One patient who chose on-demand therapy switched to maintenance therapy, while 3 patients switched to no medication. Recurrence of symptoms occurred in 9 patients who chose no medication. They were administered maintenance therapy and five of them were subsequently switched to on-demand therapy. Ultimately, the proportion of patients receiving each treatment was 35.3% (18/51) for maintenance therapy, 43.1% (22/51) for on-demand therapy, and 21.6% (11/51) for no medication. A predictive factor for the need for continuous treatment was the presence of esophageal hiatal hernia (odds ratio: 6.03, 95% confidence interval: 1.43-25.3, p = 0.014).Among patients with healed mild erosive esophagitis, 78.4% required continuous treatment with VPZ, while 21.6% remained symptom free with no medication. On-demand therapy was the most common treatment, and continuous treatment may be recommended for patients with esophageal hiatal hernia.