title: [Risk factors of irritable bowel syndrome in adolescents in China].
abstract: OBJECTIVE
  To explore the risk factors for irritable bowel syndrome (IBS) among school adolescents in China.
  
  
  METHODS
  A stratified, randomized study by cluster sampling was conducted, which recruited 51,956 students from high and primary schools in Chinese cities. All students were requested to fill in a questionnaire.
  
  
  RESULTS
  (1) Factors including class (odds ratio 1.12), excessive intake of pepper (odds ratio 1.17), fried (odds ratio 1.08) and starch-based foods (odds ratio 1.06), gastrointestinal tract infection (odds ratio 2.66), abuse of analgesic (odds ratio 1.49), inheritance (odds ratio 1.83), fatigue (odds ratio 1.32) and repression (odds ratio 1.45) were significantly associated with the presence of IBS (P < 0.05). High protein food (odds ratio 0.90) was a protective factor.
  
  
  CONCLUSIONS
  Different food intake, gastrointestinal tract infection, abuse of analgesic, inheritance and psychological factors might be related to development of IBS in the students of the cities involved in this study.
authors.affiliation: Department of Gastroenterology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China.
authors.forename: Hui-qing
authors.initials: HQ
authors.lastname: Zhou
authors.forename: Ding-guo
authors.initials: DG
authors.lastname: Li
authors.forename: Yan-yan
authors.initials: YY
authors.lastname: Song
authors.forename: Chun-hua
authors.initials: CH
authors.lastname: Zong
authors.forename: Ying
authors.initials: Y
authors.lastname: Hu
authors.forename: Xiao-xing
authors.initials: XX
authors.lastname: Xu
authors.forename: Han-ming
authors.initials: HM
authors.lastname: Lu
mesh_terms: D000293:Adolescent; D002648:Child; D002681:China / Q000453:epidemiology; D006801:Humans; D043183:Irritable Bowel Syndrome / Q000453:epidemiology* / Q000209:etiology; D012307:Risk Factors; D012494:Sampling Studies; D013334:Students; D011795:Surveys and Questionnaires