BACKGROUND & AIMS: Data on secular trends and outcomes of eosinophilic esophagitis (EE) are scarce. We performed a population-based study to assess the epidemiology and outcomes of EE in Olmsted County, Minnesota, over the last 3 decades. METHODS: All cases of EE diagnosed between 1976 and 2005 were identified using the Rochester Epidemiology Project resources. Esophageal biopsies with any evidence of esophagitis and/or eosinophilic infiltration were reviewed by a single pathologist. Clinical course (treatment, response, and recurrence) was defined using information collected from medical records and prospectively via a telephone questionnaire. Incidence rates per 100,000 person years were directly adjusted for age and sex to the US 2000 population structure. RESULTS: A total of 78 patients with EE were identified. The incidence of EE increased significantly over the last 3 of the 5-year intervals (from 0.35 [95% confidence interval (CI)], 0-0.87] per 100,000 person-years during 1991-1995 to 9.45 [95% CI, 7.13-11.77] per 100,000 person-years during 2001-2005). The prevalence of EE was 55.0 (95% CI, 42.7-67.2) per 100,000 persons as of January 1, 2006, in Olmsted County, Minnesota. EE was diagnosed more frequently in late summer/fall. The clinical course of patients with EE was characterized by recurrent symptoms (observed in 41% of patients). CONCLUSIONS: The prevalence and incidence of EE is higher than previously reported. The incidence of clinically diagnosed EE increased significantly over the last 3 decades, in parallel with endoscopy volume. Seasonal incidence was greatest in late summer and fall. EE also appears to be a recurrent relapsing disease in a substantial proportion of patients.
BACKGROUND & AIMS: Data on secular trends and outcomes of eosinophilic esophagitis (EE) are scarce. We performed a population-based study to assess the epidemiology and outcomes of EE in Olmsted County, Minnesota, over the last 3 decades. METHODS: All cases of EE diagnosed between 1976 and 2005 were identified using the Rochester Epidemiology Project resources. Esophageal biopsies with any evidence of esophagitis and/or eosinophilic infiltration were reviewed by a single pathologist. Clinical course (treatment, response, and recurrence) was defined using information collected from medical records and prospectively via a telephone questionnaire. Incidence rates per 100,000 person years were directly adjusted for age and sex to the US 2000 population structure. RESULTS: A total of 78 patients with EE were identified. The incidence of EE increased significantly over the last 3 of the 5-year intervals (from 0.35 [95% confidence interval (CI)], 0-0.87] per 100,000 person-years during 1991-1995 to 9.45 [95% CI, 7.13-11.77] per 100,000 person-years during 2001-2005). The prevalence of EE was 55.0 (95% CI, 42.7-67.2) per 100,000 persons as of January 1, 2006, in Olmsted County, Minnesota. EE was diagnosed more frequently in late summer/fall. The clinical course of patients with EE was characterized by recurrent symptoms (observed in 41% of patients). CONCLUSIONS: The prevalence and incidence of EE is higher than previously reported. The incidence of clinically diagnosed EE increased significantly over the last 3 decades, in parallel with endoscopy volume. Seasonal incidence was greatest in late summer and fall. EE also appears to be a recurrent relapsing disease in a substantial proportion of patients.
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