Table 1—

Characteristics of participants with normal or impaired glucose tolerance in IRAS Exam I, 1992–1994 (n = 979)

CharacteristicsValue
Population characteristics
    Age (years)54.8 ± 8.5
    Sex (female)54.9
Ethnicity
    Non-Hispanic white39.8
    Hispanic34.2
    African American26.0
Impaired glucose tolerance32.8
Current smoking16.2
Family history of diabetes (first degree relative)39.6
Total energy expenditure (kcal · kg−1 · year−1)14,841.7 ± 2,758.5
Dietary characteristics
    Glycemic index58.0 ± 4.0
    Glycemic load (g/day)128.3 ± 55.9
    Carbohydrates (g/day)220.5 ± 92.4
    Fiber (g/day)16.9 ± 7.9
    Total energy intake (kJ/day)8,224.1 ± 3,481.1
Physiological and anthropometric characteristics
    Insulin sensitivity (min−1 · μU−1 · mL−1 · 10−4)1.72 ± 0.04*
    Fasting insulin (pmol/l)76.7 ± 1.9*
    AIR (μU · ml−1 · min−1)62.3 ± 1.7*
    Disposition index223.6 ± 8.9*
    BMI (kg/m2)28.4 ± 5.6
    Waist circumference (cm)90.6 ± 12.8
  • Data are means ± SD or %.

  • *

    * Values shown are geometric means and SEs derived by the Delta method.