To the Editor.—
In 1985, 4.3 million water beds were sold in the United States. This figure represents 22.7% of all beds sold and a 25% increase in water bed sales as compared with 1984, according to the Waterbed Manufacturing Association.
One of us (M.S.K.), a practicing gastroenterologist, observed what seemed to be a relationship between young patients with reflux esophagitis and use of water beds. In an effort to document the presence of such a relationship, the records of 100 patients who underwent gastroesophageal endoscopy at Strong Memorial Hospital, Rochester, NY, were reviewed. The endoscopic records of a single endoscopist (M.S.K.) were reviewed retrospectively beginning on June 30, 1986. Fifty patients with at least 2+ (moderate erythema and friability) esophagitis were selected. The patients' medical records were reviewed in an effort to determine water bed usage. If that information was not in the record, the patient was contacted