title: Metabolic syndrome, C-reactive protein and microalbuminuria in a rural Chinese population: a cross-sectional study.
abstract: BACKGROUND
  Microalbuminuria is an early marker of chronic kidney disease (CKD). Previous studies have shown that either metabolic syndrome (MetS) or chronic inflammation is related to renal impairment. The aim of this study was to investigate the association between MetS, C-reactive protein (CRP) and microalbuminuria in a rural Chinese population.
  
  
  METHODS
  This was a cross-sectional study using data from the Handan Eye Study. MetS was defined according to the Chinese Diabetes Society (CDS) criteria. CRP levels ≥ 3 mg/L were classified as high CRP. Microalbuminuria was defined as a urinary albumin/creatinine ratio (ACR) of 30-300 mg/g.
  
  
  RESULTS
  We included 4191 subjects aged ≥ 30 years in this analysis. The prevalence of MetS and microalbuminuria in the group was 25.7% and 15.6%, respectively. The odds ratio (OR) of microalbuminuria in subjects with MetS was 1.25 (95% confidence interval (CI): 1.03 - 1.51) compared with those without microalbuminuria. In multivariate logistic regression analysis, high blood pressure (OR 1.36, 95% CI: 1.10 - 1.67) and high fasting blood glucose (OR 1.44, 95% CI: 1.17 - 1.76) were independently associated with microalbuminuria. Subjects with high CRP and MetS had a 1.46-fold greater risk of having microalbuminuria compared with those with low CRP without MetS (95% CI: 1.06 - 2.01).
  
  
  CONCLUSIONS
  In this rural Chinese population aged ≥30 years, MetS and microalbuminuria were independently related and the combination of high CRP and MetS was associated with an increased risk of microalbuminuria.
authors.forename: Liping
authors.initials: L
authors.lastname: Jiang
authors.forename: Wen
authors.initials: W
authors.lastname: Huang
authors.forename: Yuanbo
authors.initials: Y
authors.lastname: Liang
authors.forename: Fenghua
authors.initials: F
authors.lastname: Wang
authors.forename: Xinrong
authors.initials: X
authors.lastname: Duan
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Yang
authors.forename: Jiangping
authors.initials: J
authors.lastname: Wen
authors.forename: Ningli
authors.initials: N
authors.lastname: Wang
mesh_terms: D000328:Adult; D000368:Aged; D000419:Albuminuria / Q000097:blood* / Q000208:ethnology*; D044466:Asian People / Q000208:ethnology*; D015415:Biomarkers / Q000097:blood; D002097:C-Reactive Protein / Q000378:metabolism*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D024821:Metabolic Syndrome / Q000097:blood* / Q000208:ethnology*; D008875:Middle Aged; D011159:Population Surveillance / Q000379:methods; D012424:Rural Population
chemical_list: D015415:Biomarkers; D002097:C-Reactive Protein