title: Estimation of insulin resistance in non-diabetic normotensive Saudi adults by QUICKI, HOMA-IR and modified QUICKI: a comparative study.
abstract: OBJECTIVE
  Identification of insulin resistance (IR) in the general population is important for developing strategies to reduce the prevalence of non-insulin-dependent diabetes mellitus (NIDDM). We used the original and a modified version of the Quantitative Insulin Sensitivity Check Index (QUICKI, M-QUICKI), and the Homeostasis Model Assessment of Insulin Resistance (HOMA-IR) to divide non-diabetic normotensive adults into high- (HIR) and low-insulin-resistant (LIR) subgroups to investigate similarities and differences in their characteristics.
  
  
  METHODS
  Three hundred fifty-seven healthy adults aged 18-50 years were recruited randomly from health centers in Jeddah in a cross-sectional study design. Anthropometric and demographic information was taken. Insulin, glucose, lipid profile and free fatty acid were determined in fasting blood samples. M-QUICKI, HOMA-IR and QUICKI were calculated. Reported cut-off points were used to identify HIR subjects, who were then matched for age and sex to others in the study population, resulting in 3 HIR and 3 LIR subgroups.
  
  
  RESULTS
  Two hundred nine subjects satisfied the selection criteria. M-QUICKI correlated significantly (P=.01) with HOMA-IR and QUICKI values. Increased adiposity was the common characteristic of the three HIR subgroups. HIR subgroups identified using M-QUICKI (97 subjects) and HOMA (25 subjects), but not QUICKI (135 subjects), had statistically different biochemical characteristics compared to corresponding LIR sub-groups.
  
  
  CONCLUSIONS
  Adiposity, but not sex, is a risk factor for IR in the studied population. Further studies are needed to choose the most appropriate index for detecting IR in community-based surveys.
authors.affiliation: Department of Clinical Biochemistry, Faculty of Medicine, King Abdul Aziz University, Jeddah, Saudi Arabia. sbahijri@gmail.com
authors.forename: Suhad M
authors.initials: SM
authors.lastname: Bahijri
authors.forename: Eman M
authors.initials: EM
authors.lastname: Alissa
authors.forename: Daad H
authors.initials: DH
authors.lastname: Akbar
authors.forename: Tawfik M
authors.initials: TM
authors.lastname: Ghabrah
mesh_terms: D050154:Adiposity; D000293:Adolescent; D000328:Adult; D001786:Blood Glucose / Q000378:metabolism; D003430:Cross-Sectional Studies; D005230:Fatty Acids, Nonesterified / Q000097:blood; D005260:Female; D006706:Homeostasis; D006801:Humans; D007328:Insulin / Q000097:blood*; D007333:Insulin Resistance; D008055:Lipids / Q000097:blood; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D012529:Saudi Arabia / Q000453:epidemiology; D012737:Sex Factors; D055815:Young Adult
chemical_list: D001786:Blood Glucose; D005230:Fatty Acids, Nonesterified; D007328:Insulin; D008055:Lipids