title: C-reactive protein and gamma-glutamyltransferase concentrations in relation to the prevalence of type 2 diabetes diagnosed by glucose or HbA1c criteria in Chinese adults in Qingdao, China.
abstract: OBJECTIVE
  To investigate the association of C-reactive protein (CRP) and gamma glutamyltransferase (GGT) concentrations with newly diagnosed diabetes defined by either glucose or HbA1c criteria in Chinese adults.
  
  
  METHODS
  A population-based cross-sectional study was conducted in 2006. Data from 1167 men and 1607 women aged 35-74 years were analyzed. Diabetes was defined according to either glucose or HbA1c criteria alone.
  
  
  RESULTS
  Compared with nondiabetes, multivariate-adjusted OR (95%CI) was 1.13 (0.90,1.42) in men and 1.21 (1.00,1.45) in women for CRP and 1.42 (1.18,1.72) and 1.57 (1.31,1.87) for GGT, respectively. Neither CRP nor GGT was associated with the presence of diabetes defined by the HbA1c criterion.
  
  
  CONCLUSIONS
  The effect of elevated CRP on diabetes defined by the glucose criterion was mediated through obesity, but elevated GGT was an independent risk factor for diabetes in this Chinese population. None of the two was, however, associated with the elevated HbA1c concentrations.
authors.affiliation: Department of Epidemiology and Health Statistics, Shandong University, Jinan, China.
authors.forename: J
authors.initials: J
authors.lastname: Ren
authors.forename: Z C
authors.initials: ZC
authors.lastname: Pang
authors.forename: W G
authors.initials: WG
authors.lastname: Gao
authors.forename: H R
authors.initials: HR
authors.lastname: Nan
authors.forename: S J
authors.initials: SJ
authors.lastname: Wang
authors.forename: L
authors.initials: L
authors.lastname: Zhang
authors.forename: Q
authors.initials: Q
authors.lastname: Qiao
mesh_terms: D000328:Adult; D000368:Aged; D001786:Blood Glucose / Q000032:analysis*; D015992:Body Mass Index; D002097:C-Reactive Protein / Q000032:analysis; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D003924:Diabetes Mellitus, Type 2 / Q000097:blood* / Q000175:diagnosis / Q000453:epidemiology*; D003940:Diagnostic Techniques, Endocrine; D005260:Female; D006442:Glycated Hemoglobin / Q000032:analysis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000097:blood; D015995:Prevalence; D005723:gamma-Glutamyltransferase / Q000097:blood*
chemical_list: D001786:Blood Glucose; D002097:C-Reactive Protein; D006442:Glycated Hemoglobin; D005723:gamma-Glutamyltransferase; C517652:hemoglobin A1c protein, human; C554782:gamma-glutamyltransferase, human