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Table 1 Descriptive statistics of the U.S. adult population ages 35-74 by diabetes status and period

From: Mortality and excess risk in US adults with pre-diabetes and diabetes: a comparison of two nationally representative cohorts, 1988–2006

  No Diabetes Pre-Diabetes Diabetes
  NHANES III NHANES CTS NHANES III NHANES CTS NHANES III NHANES CTS
Sample size 6,277 4,014 1,679 660 1,254 796
Mean age, y 49.45 49.47 56.19 55.52 57.11 56.99
Hispanic,% 7.62 10.84 10.26 15.65 11.25 16.91
Non-Hispanic Black,% 7.32 8.71 20.07 16.67 17.69 17.79
Education,%       
 Less than High School 20.99 17.66 † 35.63 29.06 44.35 37.61
 High School 33.21 24.45 † 35.56 28.52 † 33.15 24.84 †
 More than High School 45.80 57.89 † 28.82 42.42 † 22.51 37.55 †
Smoking Status,%       
 Current 25.43 23.91 37.63 22.13 † 22.01 19.13
 Former 31.51 28.51 † 30.04 33.85 40.98 34.56
 Never 43.06 47.58 † 32.33 44.02 † 37.02 46.31 †
Mean BMIa (kg/m2) 26.69 27.73 † 28.85 31.74 † 31.41 32.86 †
BMIa category (kg/m2),%       
 30 to 35 15.09 17.41 † 20.34 31.98 † 28.25 25.68
 More than 35 6.88 10.48 † 15.33 24.27 † 26.20 33.15 †
Mean HbA1c 5.16 5.24 † 5.99 5.97 8.11 8.00
  1. BMI: body mass index; HbA1c: Hemoglobin A1c; a. BMI derived from measure data on height and weight; No Diabetes is defined as HbA1c less than 5.7%; Pre-Diabetes is defined as HbA1c between 5.7 and 6.5%; Diabetes is defined as HbA1c above 6.5% or on treatment for diabetes. Sources: National Health and Nutrition Examination Survey (NHANES) III (1988–1994) and continuos (CTS) (1999–2002).
  2. † Significantly different (p < 0.05) compared with NHANES III.