title: Life expectancy, complications, and causes of death in patients with achalasia: results of a 33-year follow-up investigation.
abstract: BACKGROUND
  Patients with achalasia require repeated invasive therapies and may experience multiple complications. The objectives of this study were to determine the incidence of such complications, causes of death, and life expectancy in 253 patients.
  
  
  METHODS
  Patients consisted of two groups: group A comprised 177 patients with newly diagnosed achalasia; group B consisted of 76 patients in whom the diagnosis had been established in external institutions. All patients regularly underwent structured interviews and were reinvestigated if changes in health status occurred. Survival rates were determined by Kaplan-Meier estimates and were compared with those of an average German population. Causes of death were determined from hospital records, information supplied by private physicians, and from death certificates.
  
  
  RESULTS
  Complete follow-up was obtained in 98.9% (group A) and in 100% (group B) of all patients. The observation period for group A ranged from 2 to 33 years and for group B from 2 to 26 years (disease duration: 4-68 years). The most frequent complications were reflux esophagitis (group A: 6.2%, group B: 19.7%) and megaesophagus (group A: 6.2%, group B: 21.0%). Thirty-six patients had died during follow-up. Five of these deaths were related to achalasia. In group A, the estimated 20-year survival rates in patients with achalasia [76% (95% confidence interval (CI): 66-85%)] did not significantly differ from those in controls 80% (95% CI: 71-89%). In group B, 25-year survival rates were also similar in patients [87% (95% CI: 78-97%)] and controls [86% (95% CI: 76-97%)].
  
  
  CONCLUSIONS
  Patients with achalasia experience a significant number of complications. Causes of death and life expectancy, however, do not differ from those of the average population.
authors.affiliation: Department of Gastroenterology, Deutsche Klinik für Diagnostik, Wiesbaden, Germany. eckardt.gastro@dkd-wiesbaden.de
authors.forename: Volker F
authors.initials: VF
authors.lastname: Eckardt
authors.forename: Tom
authors.initials: T
authors.lastname: Hoischen
authors.forename: Gudrun
authors.initials: G
authors.lastname: Bernhard
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000150:complications / Q000401:mortality; D016022:Case-Control Studies; D002423:Cause of Death; D002648:Child; D018450:Disease Progression; D004931:Esophageal Achalasia / Q000150:complications / Q000401:mortality*; D004938:Esophageal Neoplasms / Q000150:complications / Q000401:mortality; D004941:Esophagitis / Q000150:complications / Q000401:mortality; D005260:Female; D005500:Follow-Up Studies; D005764:Gastroesophageal Reflux / Q000150:complications / Q000401:mortality; D005858:Germany / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D008017:Life Expectancy; D008297:Male; D008875:Middle Aged; D015996:Survival Rate