Table 1—

Characteristics of the RBS population, 1984–1987*

VariableNormal glucose tolerance (n = 1,035)Abnormal glucose tolerance (n = 514)P
Female sex560 (54.1)314 (61.1)0.008
Age (years)65.3 ± 11.271.3 ± 9.8<0.001
Education
    High school or greater985 (95.2)500 (97.3)0.05
    Less than high school50 (4.8)14 (2.7)
Family history of diabetes153 (16.1)68 (14.4)0.40
BMI (kg/m2)
    Men25.8 ± 3.126.2 ± 4.70.54
    Women24.2 ± 4.824.4 ± 3.50.40
Waist (cm)
    Men92.9 ± 8.594.2 ± 9.50.10
    Women76.7 ± 9.579.9 ± 9.5<0.001
Systolic blood pressure (mmHg)133.0 ± 21.3143.6 ± 21.2<0.001
Diastolic blood pressure (mmHg)76.6 ± 9.476.2 ± 9.60.43
Fasting plasma glucose
    <95 mg/dl463 (44.7)137 (26.7)<0.001
    95–104 mg/dl378 (36.5)198 (38.5)
    105–115 mg/dl159 (15.4)130 (25.3)
    116–125 mg/dl35 (3.4)49 (9.5)
Triglycerides
    <150 mg/dl858 (82.9)364 (70.8)<0.001
    ≥150 mg/dl177 (17.1)150 (29.2)
LDL (mg/dl)135.0 ± 35.6136.8 ± 39.00.37
HDL (mg/dl)63.5 ± 19.060.2 ± 18.9<0.001
Total cholesterol (mg/dl)220.0 ± 38.3223.3 ± 44.10.15
HbA1c (%)6.0 ± 0.76.1 ± 0.8<0.001
  • Data are means ±SD or n (%).

  • *

    * Excluding those with known diabetes or fasting glucose ≥126 mg/dl; abnormal glucose tolerance is defined by a 2-h postchallenge glucose level ≥140 mg/dl.

  • Comparisons by Student’s t test, Wilcoxon, or χ2 tests where appropriate.