title: Relation between insulin resistance and hematological parameters in elderly Koreans-Southwest Seoul (SWS) Study.
abstract: In this study, we investigated the relation between insulin resistance and hematological parameters in elderly Koreans. This study included 1314 non-diabetic subjects over the age of 60, selected from a cross-sectional study, which was conducted in 1999 in Seoul, Korea. We measured fasting and post-load 2 h plasma glucose, insulin levels, lipid profiles, anthropometric measures, and hematological parameters. The degree of insulin resistance was assessed using the homeostasis model assessment (HOMA). We found a correlation between insulin resistance and hemoglobin concentrations in non-smoking men (r=0.20, P=0.0186). In non-smoking women, insulin resistance correlated with hemoglobin (r=0.10, P=0.0017) and with white blood cell (WBC) count (r=0.15, P=0.001). Hemoglobin concentrations and WBC counts were also associated with other components of the insulin resistance syndrome such as body mass index, blood pressure, lipid profiles and fasting plasma insulin levels (surrogate for insulin resistance). Furthermore, the group in the upper quartile for insulin resistance showed higher hemoglobin concentrations and WBC counts than the lower quartile, independent of smoking status and serum iron concentrations. Using HOMA-IR as a dependent variable in a multiple regression analysis, age, body mass index (BMI), waist-to-hip ratio (WHR), systolic blood pressure, HDL cholesterol, triglyceride, WBC count, hemoglobin, hematocrit and serum TIBC were significant. Our results provide support for a relation between insulin resistance/hyperinsulinemia and hematological parameters such as hemoglobin concentrations and WBC counts in elderly Koreans. This suggests that increased erythropoiesis and subclinical inflammation could be part of the metabolic syndrome in elderly Koreans.
authors.affiliation: Department of Internal Medicine, College of Medicine, Korea University Guro Hospital, 80 Guro-Dong, Guro-Gu, Seoul 152-050, South Korea.
authors.forename: K M
authors.initials: KM
authors.lastname: Choi
authors.forename: J
authors.initials: J
authors.lastname: Lee
authors.forename: Y H
authors.initials: YH
authors.lastname: Kim
authors.forename: K B
authors.initials: KB
authors.lastname: Kim
authors.forename: D L
authors.initials: DL
authors.lastname: Kim
authors.forename: S G
authors.initials: SG
authors.lastname: Kim
authors.forename: D H
authors.initials: DH
authors.lastname: Shin
authors.forename: N H
authors.initials: NH
authors.lastname: Kim
authors.forename: I B
authors.initials: IB
authors.lastname: Park
authors.forename: D S
authors.initials: DS
authors.lastname: Choi
authors.forename: S H
authors.initials: SH
authors.lastname: Baik
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001786:Blood Glucose / Q000032:analysis; D001824:Body Constitution; D015992:Body Mass Index; D003430:Cross-Sectional Studies; D004906:Erythrocyte Count; D005260:Female; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D006946:Hyperinsulinism; D007333:Insulin Resistance / Q000502:physiology*; D007723:Korea; D007958:Leukocyte Count; D008297:Male; D008875:Middle Aged
chemical_list: D001786:Blood Glucose; D006454:Hemoglobins