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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 white 39.8 
    Hispanic 34.2 
    African American 26.0 
Impaired glucose tolerance 32.8 
Current smoking 16.2 
Family history of diabetes (first degree relative) 39.6 
Total energy expenditure (kcal · kg−1 · year−114,841.7 ± 2,758.5 
Dietary characteristics  
    Glycemic index 58.0 ± 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 · 10−41.72 ± 0.04* 
    Fasting insulin (pmol/l) 76.7 ± 1.9* 
    AIR (μU · ml−1 · min−162.3 ± 1.7* 
    Disposition index 223.6 ± 8.9* 
    BMI (kg/m228.4 ± 5.6 
    Waist circumference (cm) 90.6 ± 12.8 
CharacteristicsValue
Population characteristics  
    Age (years) 54.8 ± 8.5 
    Sex (female) 54.9 
Ethnicity  
    Non-Hispanic white 39.8 
    Hispanic 34.2 
    African American 26.0 
Impaired glucose tolerance 32.8 
Current smoking 16.2 
Family history of diabetes (first degree relative) 39.6 
Total energy expenditure (kcal · kg−1 · year−114,841.7 ± 2,758.5 
Dietary characteristics  
    Glycemic index 58.0 ± 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 · 10−41.72 ± 0.04* 
    Fasting insulin (pmol/l) 76.7 ± 1.9* 
    AIR (μU · ml−1 · min−162.3 ± 1.7* 
    Disposition index 223.6 ± 8.9* 
    BMI (kg/m228.4 ± 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.

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