title: Recent trends in colonic diverticulosis in Yokohama City: a possibility of changing to a more Western profile.
abstract: OBJECTIVE
  Right-sided type colonic diverticulosis has been predominant in Japan, in contrast to European counties where the left-sided type is predominant. Considering the recent change in the dietary habits of Japanese people to a more Western diet in urban areas of Japan, the features of colonic diverticulosis may also change to reflect a more Western type. Therefore, we attempted to clarify the current situation.
  
  
  METHODS
  A total of 435 consecutive outpatients who agreed to a barium enema and complete examination were enrolled in this study.
  
  
  RESULTS
  113 patients (26.0%) revealed colon diverticulosis; 50.4% of the patients had more than ten diverticula. The percentage of man with ten or more diverticula (67.4%) was significantly higher than that of women patients (40.0%, p<0.01). Among the 88 patients who had four or more diverticula, 39 patients (44.3%) were right-side dominant, 27 (30.7%) left-side dominant and 22 (25.0%) were both-sides. Thirteen (68.4%) of the 19 patients who had more than 30 diverticula were left-side dominant.
  
  
  CONCLUSIONS
  The clinical features of colon diverticulosis in the patients living in Yokohama may be changing to reflect a more Western type, in particular decreased right-side dominance, increases in the left-side and both-sides dominant patients, and the emergence of patients with crowded diverticula in the left-side colon was observed.
authors.affiliation: Tarao's Gastroenterological Clinic, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Tarao
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Sekino
authors.forename: Takashi
authors.initials: T
authors.lastname: Nonaka
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Iida
authors.forename: Masahiko
authors.initials: M
authors.lastname: Inamori
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nakajima
authors.forename: Shin
authors.initials: S
authors.lastname: Maeda
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Natsumeda
authors.forename: Tadashi
authors.initials: T
authors.lastname: Ikegami
authors.forename: Kenji
authors.initials: K
authors.lastname: Ohshige
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People / Q000706:statistics & numerical data*; D001466:Barium Sulfate / Q000008:administration & dosage*; D003287:Contrast Media / Q000008:administration & dosage*; D059305:Diet, High-Fat / Q000009:adverse effects*; D018450:Disease Progression; D043963:Diverticulosis, Colonic / Q000000981:diagnostic imaging / Q000208:ethnology* / Q000473:pathology*; D005260:Female; D006801:Humans; D015994:Incidence; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D011859:Radiography; D017678:Sex Distribution
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate