title: Prevalence and risk factors of functional dyspepsia: a nationwide multicenter prospective study in Korea.
abstract: OBJECTIVE
  To evaluate the prevalence of functional dyspepsia (FD) and its risk factors.
  
  
  BACKGROUND
  FD is a common disorder, but its negative influences greatly affect the quality of life. The predictive factors of FD are still ambiguous.
  
  
  METHODS
  A total of 3399 participants underwent screening gastroscopy at one of 7 nationwide health care centers in Korea and who completed a questionnaire. Atrophic gastritis was defined by gastroscopy. Serologic Helicobacter pylori immunoglobulin G antibody was measured by enzyme-linked immunosorbent assay.
  
  
  RESULTS
  Of the 3399 participants who did not have organic diseases, 694 (20.4%) had dyspeptic symptoms such as epigastric pain/soreness or postprandial discomfort. Among the 694 participants, atrophic gastritis and positive H. pylori serology were found in 282 (40.6%) and 422 (60.8%), respectively; these proportions were not different from the remaining asymptomatic subjects. Multivariate analysis showed that having relatives with gastric cancer [odds ratio (OR), 1.35; 95% confidence interval (CI), 1.01-1.81], education below college (OR, 1.32; 95% CI, 1.06-1.64), and high-salt diet (OR, 1.33; 95% CI, 1.05-1.68) were associated with FD symptoms.
  
  
  CONCLUSIONS
  FD symptoms were frequently found in the health check-up subjects. Relatives of gastric cancer, education below college, and high-salt diet were risk factors of FD, suggesting that FD is a multifactorial disease.
authors: *Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam †Department of Internal Medicine, Chonnam National University Medical School, Gwangju ‡Department of Internal Medicine, Hallym University College of Medicine, Chuncheon §Department of Internal Medicine, Dankook University College of Medicine, Cheonan ∥Department of Internal Medicine, Wonkwang University College of Medicine, Iksan ¶Department of Internal Medicine, Pusan National University School of Medicine, Busan #Department of Internal Medicine, Jeju National University School of Medicine, Jeju **School of Public Health and Institute of Health and Environment, Seoul National University, Seoul, South Korea.
authors: Sung Eun
authors: SE
authors: Kim
authors: Hyun Kyung
authors: HK
authors: Park
authors: Nayoung
authors: N
authors: Kim
authors: Young-Eun
authors: YE
authors: Joo
authors: Gwang-Ho
authors: GH
authors: Baik
authors: Jeong Eun
authors: JE
authors: Shin
authors: Geom Seog
authors: GS
authors: Seo
authors: Gwang Ha
authors: GH
authors: Kim
authors: Heung-Up
authors: HU
authors: Kim
authors: Hyun Young
authors: HY
authors: Kim
authors: Seon Mie
authors: SM
authors: Kim
authors: Ji-Hyun
authors: JH
authors: Seo
authors: Eun-Ha
authors: EH
authors: Park
authors: Sung-Il
authors: SI
authors: Cho
mesh_terms: D015746:Abdominal Pain / Q000453:epidemiology; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004415:Dyspepsia / Q000175:diagnosis / Q000453:epidemiology*; D004522:Educational Status; D005260:Female; D005757:Gastritis, Atrophic / Q000175:diagnosis / Q000453:epidemiology*; D005773:Gastroscopy; D016481:Helicobacter Infections / Q000097:blood / Q000453:epidemiology*; D016480:Helicobacter pylori / Q000276:immunology*; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011446:Prospective Studies; D056910:Republic of Korea / Q000453:epidemiology; D012307:Risk Factors; D017673:Sodium Chloride, Dietary; D013274:Stomach Neoplasms / Q000235:genetics*; D011795:Surveys and Questionnaires; D055815:Young Adult
chemical_list: D007074:Immunoglobulin G; D017673:Sodium Chloride, Dietary