title: Basal and residual lower esophageal pressures increase in old age in classic achalasia, but not vigorous achalasia.
abstract: OBJECTIVE
  The relationship between age and esophageal motility parameters (i.e. basal and residual pressure of the lower esophageal sphincter [LES]) remains to be established in achalasia patients, possibly because most previous studies did not distinguish between classic and vigorous achalasia patients. We investigated the relationship between age and esophageal motility parameters in both classic and vigorous achalasia patients.
  
  
  METHODS
  A retrospective review of esophageal manometry data in a single center was undertaken. Basal and residual pressure for LES was analyzed. A total of 103 achalasia patients were enrolled, comprising 84 classic and 19 vigorous types. They were subdivided into three different age groups as follows: 21-40 years old (group A), 41-60 years old (group B), and over 60 years old (group C).
  
  
  RESULTS
  In classic achalasia patients (M : F = 27:57, mean age = 44 +/- 15 years old) the older age group showed a significantly higher basal LES pressure (49.62 +/- 19.63 mmHg) than the younger age group (P < 0.0001). Moreover, the older age group also showed significantly high residual LES pressure (20.46 +/- 8.61 mmHg) than the younger age group (P = 0.0006). In contrast, in vigorous achalasia patients (M : F = 12:7, mean age: 47 +/- 15 years old) there were no difference between age and motility indices (all P > 0.05).
  
  
  CONCLUSIONS
  In classic achalasia patients there appears to be a correlation between age and esophageal motility indices, especially basal and residual LES pressure. Such correlations do not appear to exist for vigorous achalasia patients.
authors.affiliation: Asan Digestive Disease Research Institute, Department of Internal Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
authors.forename: Kee Wook
authors.initials: KW
authors.lastname: Jung
authors.forename: Hwoon-Yong
authors.initials: HY
authors.lastname: Jung
authors.forename: In Ja
authors.initials: IJ
authors.lastname: Yoon
authors.forename: Do Hoon
authors.initials: DH
authors.lastname: Kim
authors.forename: Hye-Won
authors.initials: HW
authors.lastname: Park
authors.forename: Jun-Won
authors.initials: JW
authors.lastname: Chung
authors.forename: Kwi-Sook
authors.initials: KS
authors.lastname: Choi
authors.forename: Kyung Jo
authors.initials: KJ
authors.lastname: Kim
authors.forename: Kee Don
authors.initials: KD
authors.lastname: Choi
authors.forename: Ho June
authors.initials: HJ
authors.lastname: Song
authors.forename: Gin Hyug
authors.initials: GH
authors.lastname: Lee
authors.forename: Jin-Ho
authors.initials: JH
authors.lastname: Kim
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000375:Aging; D004931:Esophageal Achalasia / Q000145:classification / Q000503:physiopathology*; D004947:Esophagus / Q000503:physiopathology*; D006801:Humans; D008365:Manometry; D008875:Middle Aged; D011312:Pressure; D056910:Republic of Korea; D012189:Retrospective Studies; D055815:Young Adult