title: Different associations of diabetes with β-cell dysfunction and insulin resistance among obese and nonobese Chinese women with prior gestational diabetes mellitus.
abstract: OBJECTIVE
  To examine the relative contributions of β-cell dysfunction and insulin resistance to postpartum diabetes risk among obese and nonobese women with prior gestational diabetes mellitus (GDM).
  
  
  METHODS
  We performed a cross-sectional survey 1-5 years after 1,263 women who had GDM gave birth. Polytomous logistic regression models were used to assess the associations of β-cell dysfunction (the lower quartile of HOMA-%β), insulin resistance (the upper quartile of HOMA-IR), decreased insulin sensitivity (the lower quartile of HOMA-%S), and different categories of BMI with prediabetes and diabetes risk.
  
  
  RESULTS
  β-Cell dysfunction, insulin resistance, and decreased insulin sensitivity all were significantly associated with hyperglycemic status across normal weight, overweight, and obese groups, and the patterns of insulin resistance and decreased insulin sensitivity were similar. BMI was inversely associated with β-cell dysfunction and positively associated with insulin resistance across normal glucose, prediabetes, and diabetes categories. Compared with women with normal glucose and weight, obese women with normal glucose had increased β-cell secretory function (odds ratio [OR] 0.09 [95% CI 0.02-0.37]) and insulin resistance (OR 17.4 [95% CI 9.47-31.9]). Normal weight diabetic women displayed the most β-cell dysfunction (OR 13.6 [95% CI 4.06-45.3]), whereas obese diabetic women displayed the highest insulin resistance (OR 45.8 [95% CI 18.5-113]).
  
  
  CONCLUSIONS
  For women with prior GDM, β-cell dysfunction had more pronounced contribution to postpartum diabetes among nonobese subjects, whereas insulin resistance contributed more to postpartum hyperglycemia among obese subjects.
authors.affiliation: Tianjin Women's and Children's Health Center, Tianjin, China Pennington Biomedical Research Center, Baton Rouge, LA.
authors.forename: Weiqin
authors.initials: W
authors.lastname: Li
authors.affiliation: Tianjin Women's and Children's Health Center, Tianjin, China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Tianjin Women's and Children's Health Center, Tianjin, China.
authors.forename: Huikun
authors.initials: H
authors.lastname: Liu
authors.affiliation: Tianjin Women's and Children's Health Center, Tianjin, China.
authors.forename: Leishen
authors.initials: L
authors.lastname: Wang
authors.affiliation: Tianjin Women's and Children's Health Center, Tianjin, China.
authors.forename: Cuiping
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Tianjin Women's and Children's Health Center, Tianjin, China.
authors.forename: Junhong
authors.initials: J
authors.lastname: Leng
authors.affiliation: Population Cancer Research Program, Dalhousie University, Halifax, Nova Scotia, Canada.
authors.forename: Zhijie
authors.initials: Z
authors.lastname: Yu
authors.affiliation: Department of Epidemiology and Biostatistics, Tianjin Medical University, Tianjin, China.
authors.forename: Xilin
authors.initials: X
authors.lastname: Yang
authors.affiliation: Tianjin Women's and Children's Health Center, Tianjin, China Tianjin Public Health Bureau, Tianjin, China.
authors.forename: Huiguang
authors.initials: H
authors.lastname: Tian
authors.affiliation: Pennington Biomedical Research Center, Baton Rouge, LA gang.hu@pbrc.edu.
authors.forename: Gang
authors.initials: G
authors.lastname: Hu
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D003920:Diabetes Mellitus / Q000209:etiology* / Q000473:pathology; D016640:Diabetes, Gestational / Q000503:physiopathology*; D005260:Female; D005951:Glucose Tolerance Test; D006801:Humans; D006943:Hyperglycemia / Q000209:etiology* / Q000473:pathology; D007333:Insulin Resistance; D050417:Insulin-Secreting Cells / Q000473:pathology*; D009765:Obesity / Q000150:complications*; D050177:Overweight; D049590:Postpartum Period; D011247:Pregnancy; D012307:Risk Factors