title: Association between IGF-1 and chronic kidney disease among US adults.
abstract: BACKGROUND
  Insulin-like growth factor (IGF-1) has been associated with cardiovascular disease, hypertension and diabetes in previous studies. However, the association between IGF-1 and chronic kidney disease (CKD) has not been previously studied. Therefore, we examined the association between serum IGF-1 and CKD in a representative sample of US adults.
  
  
  METHODS
  We conducted a cross-sectional study of 5388 Third National Health and Nutrition Examination Survey (NHANES III) participants aged ≥20 years of age (55.2% women). Serum IGF-1 was categorized into quartiles for the analysis. CKD (n = 241) was defined as an estimated glomerular filtration rate of <60 mL/min/1.73/m(2).
  
  
  CONCLUSIONS
  Higher serum IGF-1 levels were positively associated with CKD after adjusting for age, sex, race/ethnicity, education levels, smoking, alcohol intake, body mass index, diabetes, hypertension and serum cholesterol. Compared to quartile 1 of IGF-1 (referent), the odds ratio (95% confidence interval) of CKD associated with quartile 4 was 2.66 (1.18-5.99); p trend = 0.008. Subgroup analysis that examined the relation between IGF-1 and CKD by gender showed a consistent positive association. In summary, increasing levels of serum IGF-1 were positively associated with CKD in a representative sample of US adults. Our results suggest that IGF-1 might be a predictor of CKD in Western populations.
authors.affiliation: Department of Community Medicine, West Virginia University School of Medicine, P.O. Box 9190, Morgantown, WV 26506-9190, USA.
authors.forename: Srinivas
authors.initials: S
authors.lastname: Teppala
authors.forename: Anoop
authors.initials: A
authors.lastname: Shankar
authors.forename: Charumathi
authors.initials: C
authors.lastname: Sabanayagam
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D003625:Data Collection; D005260:Female; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000378:metabolism*; D008875:Middle Aged; D051436:Renal Insufficiency, Chronic / Q000097:blood*; D014481:United States; D055815:Young Adult
chemical_list: D007334:Insulin-Like Growth Factor I