Table 1 —

Baseline characteristics of 3,174 adults aged 30–74 years in the NHANES II by glucose tolerance group

Normal glucose toleranceImpaired glucose toleranceUndiagnosed diabetesDiagnosed diabetes
n2,263480183248
Age 47.9 ± 0.3 54.3 ± 0.7 58.3 ± 1.0  58.4 ± 0.7
Women53.255.661.660.2
Caucasian92.190.587.085.5
Education less than high school33.541.553.751.7
Physical activity
 1 (high)22.218.114.910.2
 246.439.542.633.2
 321.329.228.529.1
 4 (low)10.013.313.927.5
Smoking Status
 Current36.427.829.622.9
 Past26.429.726.236.0
 Never37.242.544.241.1
BMI (kg/m2) 25.3 ± 0.1 27.8 ± 0.3 29.8 ± 0.9  27.7 ± 0.4
Diastolic blood pressure (mmHg) 78.4 ± 0.6 83.8 ± 0.9 83.9 ± 0.9  83.4 ± 1.1
Systolic blood pressure (mmHg)125.7 ± 0.8138.5 ± 1.7142.0 ± 1.7 143.4 ± 2.2
Total cholesterol (mg/dl)  219 ± 1.4  231 ± 3.0  238 ± 4.0   229 ± 3.4
HDL cholesterol (mg/dl) 50.9 ± 0.6 48.5 ± 1.2 47.7 ± 1.6  46.2 ± 1.5
Triglyercides (mg/dl)  129 ± 2.2  174 ± 7.7  216 ± 20.3  196 ± 6.3
History of heart attack3.06.79.012.3
Angina4.46.610.39.1
Cardiovascular disease7.812.420.823.8
  • Data are % or means ± SD. P < 0.05 (tests null hypothesis of homogeneity across all four glucose tolerance groups, except for diastolic blood pressure).