title: [Epidemiology of mild gastrointestinal disorders among infants and young children in Shanghai area].
abstract: OBJECTIVE
  To determine the prevalence of functional gastrointestinal disorders in children in Shanghai.
  
  
  METHODS
  This study was conducted on the infants and young children who were below 24 months of age recruited consecutively from April 2008 to June 2008 from the 12 communities in Minhang district in Shanghai. The questionnaire on gastrointestinal symptoms and growth was sent to 5030 children < 24 months old. The age distribution of the 5030 children was: < 6 months: 1922 infants (38.2%), 6 - < 12 months: 1933 (38.4%) infants; 12 - < 18 months: 811 (16.1%) children; 18 - < 24 months: 364 (7.2%) children.
  
  
  RESULTS
  Among the 5030 children, 1909 had gastrointestinal disorders (38.0%). There was no significant difference in the rate of the disorders between sexes (P = 0.06). Regurgitation was found in 899 (17.9%) infants/children, constipation in 690 (13.7%), 619 (12.3%) infants/children suffered from diarrhea and only 71 (1.4%) suffered from colic. The incidence of gastrointestinal disorders was significantly different among different age groups. The incidence of constipation and regurgitation decreased and the incidence of diarrhea increased with growth (P < 0.01). Infants growth parameters in the group with gastrointestinal disorders especially in those with regurgitation were lower than those without gastrointestinal disorders, the difference is statistically significant. The hospital visit rate of infants with diarrhea was 62.68%, which was higher than the rate of the other three symptoms (4.45% - 16.90%).
  
  
  CONCLUSIONS
  Gastrointestinal disorders are common in infants and young children in Shanghai and may have a great impact on growth. Early management could relieve the disorders and ensure infants to get normal growth and development.
authors.affiliation: Department of Pediatrics, Shanghai Ruijin Hospital Affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Li-ping
authors.initials: LP
authors.lastname: Xiao
authors.forename: Yun
authors.initials: Y
authors.lastname: Li
authors.forename: Xin-qiong
authors.initials: XQ
authors.lastname: Wang
authors.forename: Chun-di
authors.initials: CD
authors.lastname: Xu
mesh_terms: D002681:China / Q000453:epidemiology; D003085:Colic / Q000453:epidemiology; D003967:Diarrhea / Q000453:epidemiology; D005260:Female; D005767:Gastrointestinal Diseases / Q000453:epidemiology* / Q000503:physiopathology; D006801:Humans; D015994:Incidence; D007223:Infant; D008297:Male; D015995:Prevalence; D014839:Vomiting / Q000453:epidemiology