title: [Body mass index is a risk factor for new-onset non-alcoholic fatty liver disease in patients with type 2 diabetes mellitus].
abstract: OBJECTIVE
  To investigate the effect of body mass index (BMI) on new-onset non-alcoholic fatty liver disease (NAFLD) in patients with type 2 diabetes mellitus (T2DM).
  
  
  METHODS
  Subjects with T2DM were recruited from the population of individuals attending the Affiliated General Hospital of North China University for routine health examination between 2006 and 2007 and offered participation in this community-based prospective cohort study. Enrollees were categorized into groups according to weight assessed by baseline BMI (underweight, normal, overweight, and obese groups). Cumulative incidence of NAFLD was compared between each group and the effect of baseline BMI on new-onset NAFLD was assessed by Cox regression analysis.
  
  
  RESULTS
  The cumulative incidence of NAFLD increased in conjunction with increases in weight (low weight: 69%, normal weight: 73%, overweight: 90%, obese: 97%; P<0.01). Subjects in the overweight and obese groups showed an increased risk of NAFLD (relative risk (RR)=2.00, 95% CI: 1.76-2.29 and =2.87, 95% CI: 2.42-3.40; P<0.01), compared to those in the normal weight group. Moreover, after adjustment for baseline factors (e.g.age, sex) risk of NAFLD remained higher for the overweight and obese subjects (RR=1.73, 95% CI: 1.49-2.00 and =2.12, 95% CI: 1.73-2.60; P<0.01).
  
  
  CONCLUSIONS
  Risk of NAFLD in T2DM patients increases in parallel to increase in weight assessed by BMI. BMI appeared to be an independent risk factor for NAFLD.
authors.affiliation: Department of Gastroenterology, Kailuan General Hospital, North China University of Science and Technology, Tangshan 063000, China.
authors.forename: Shan
authors.initials: S
authors.lastname: Wang
authors.forename: Hailing
authors.initials: H
authors.lastname: Zhang
authors.forename: Bo
authors.initials: B
authors.lastname: Tong
authors.forename: Qian
authors.initials: Q
authors.lastname: Wang
authors.forename: Yanmin
authors.initials: Y
authors.lastname: Zhang
authors.forename: Guoling
authors.initials: G
authors.lastname: Zhu
authors.forename: Shouling
authors.initials: S
authors.lastname: Wu
mesh_terms: D015992:Body Mass Index; D002681:China; D015331:Cohort Studies; D003924:Diabetes Mellitus, Type 2; D006801:Humans; D015994:Incidence; D065626:Non-alcoholic Fatty Liver Disease; D009765:Obesity; D011446:Prospective Studies; D012307:Risk Factors