title: Risk factors and gene polymorphisms of inflammatory bowel disease in population of Zhejiang, China.
abstract: OBJECTIVE
  To identify the risk factors and three single nucleotide polymorphisms (SNPs) of NOD2/CARD15 gene in inflammatory bowel disease (IBD) of the population in Zhejiang, China.
  
  
  METHODS
  A case-control study was conducted using recall questionnaire to collect data on demographic, socioeconomic, lifestyle characteristics and dietary behaviors from 136 determined IBD patients and 136 paired healthy controls. COX regression method was used to screen the statistically significant risk factors for IBD. The polymorphisms of NOD2/CARD15 gene Arg702Trp, Gly908Arg and Leu1007fsinsC were genotyped and further compared between 60 patients with IBD and 60 healthy controls by polymerase chain reaction and restriction fragment length polymorphism.
  
  
  RESULTS
  IBD occurred primarily in young and middle-aged people. The mean age for IBD patients was 42.6 years. The ratio of males to females was 1.23:1. COX regression indicated a higher statistical significance in milk, fried food and stress compared with the other postulated risk factors for IBD. None of the patients with IBD and healthy controls had heterozygous or homozygous SNPs variants.
  
  
  CONCLUSIONS
  Milk, fried food and stress are associated with increased risk of IBD. The common variants in NOD2/CARD15 gene are not associated with IBD in China's Zhejiang population.
authors.affiliation: Department of Digestive Diseases, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, Zhejiang Province, China.
authors.forename: Zi-Wei
authors.initials: ZW
authors.lastname: Wang
authors.forename: Feng
authors.initials: F
authors.lastname: Ji
authors.forename: Wei-Jun
authors.initials: WJ
authors.lastname: Teng
authors.forename: Xiao-Gang
authors.initials: XG
authors.lastname: Yuan
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Ye
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D004032:Diet; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D015212:Inflammatory Bowel Diseases / Q000453:epidemiology / Q000235:genetics*; D008297:Male; D053473:Nod2 Signaling Adaptor Protein / Q000235:genetics; D011110:Polymorphism, Genetic; D012307:Risk Factors; D011795:Surveys and Questionnaires
chemical_list: C429018:NOD2 protein, human; D053473:Nod2 Signaling Adaptor Protein