Demographic characteristics of subjects – NHANES III, 1988–1994.

aAll of the analyses were adjusted with the NHANES III sample weights. Analayis included paticipants aged 40 years and above who had fasted glucose greater than 100 mg/dl without any oral hypoglycemic agent or insulin.bCalculated as insulin (µU/mL) x glucose (mmol/L)/22.5.cApproximately 50% of IGF1 and IGFBP3 measurements are missing. Binary (high vs. low) values were determined separately by gender from weighted distribution of available data for both gender (n = 671 and 615 for men and women, respectively).dDefined as serum cotinine level >14 ng/mL.Abbreviations: IGF1, insulin like growth factor; IGFBP3, insulin like growth factor binding protein-3; HOMA, homeostasis model assessment - insulin resistance; SE, standard error;