title: [A study on risk factors among 125 type 2 diabetes mellitus with familial tendency].
abstract: OBJECTIVE
  To study the risk factors regarding heredity and environment in familial incident type 2 diabetes mellitus (DM).
  
  
  METHODS
  To compare the difference of environmental risk factors between type 2 DM, impaired glucose tolerance (IGT) and normal persons through study on familial information and environmental risk factors in 125 familial incident type 2 DM in-patients and out-patients from 1999 to 2001. Falconer was used to estimate heritability. Penrose was used to study the heredity damagers by polygene analysis.
  
  
  RESULTS
  There was a significant constituent ratio diversity (P < 0.01) in triglyceride, body mass index, waist to hip ratio, hypertension history and physical activities history among 3 groups, while no significant diversity in blood lipids and history of coronary heart disease. 83.42% +/- 5.84% heritability of type 2 DM in 125 familial predigree indicated that dominant major gene might exist in these familiar pedigrees. Analysis of polygene in these groups showed type 2 DM might conform to the model of polygene heredity.
  
  
  CONCLUSIONS
  This study suggested that type 2 DM had significant heritability and genetic heterogeneity, which generally appeared to be a disease of multi-factorial inheritance. Environmental risk factors, genetic factors and their interactions were due to type 2 DM.
authors.affiliation: Department of Endocrinology, the Second Hospital of Changzhou Affiliated Nanjing Medical University, Changzhou 213003, China.
authors.forename: Jin-luo
authors.initials: JL
authors.lastname: Cheng
authors.forename: Mo-yu
authors.initials: MY
authors.lastname: Shen
authors.forename: Ling
authors.initials: L
authors.lastname: Zhou
authors.forename: Jin-song
authors.initials: JS
authors.lastname: Wang
mesh_terms: D000328:Adult; D001794:Blood Pressure; D015992:Body Mass Index; D002784:Cholesterol / Q000097:blood; D008078:Cholesterol, LDL / Q000097:blood; D003924:Diabetes Mellitus, Type 2 / Q000097:blood* / Q000235:genetics* / Q000503:physiopathology; D005192:Family Health; D005260:Female; D005951:Glucose Tolerance Test; D006801:Humans; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D014280:Triglycerides / Q000097:blood
chemical_list: D008078:Cholesterol, LDL; D014280:Triglycerides; D002784:Cholesterol