TABLE 2

Characteristics of diabetic study population by race/ethnicity, NHANES III (n = 1,064)*

Non-Hispanic whitesNon-Hispanic blacksMexican AmericanOverall P value
n429295340
Sex (% men)220 (51)118 (40)151 (44)0.009
Age (years)69 ± 1262 ± 1161 ± 11<0.0001
BMI (kg/m2)29.2 ± 5.730.9 ± 6.5§29.7 ± 5.70.001
Fasting glucose (mmol/l)8.1 (6.4–11.4)8.6 (6.4–13.0)8.4 (6.2–13.4)NS
2-h glucose (mmol/l)15.9 (11.6–20.2)15.3 (10.6–20.5)§18.2 (13.3–22.8)0.002
Fasting insulin (pmol/l)89 (62–133)82 (55–133)85 (56–126)NS
HbA1c (%)6.9 (6.1–8.4)7.5 (6.2–9.4)7.7 (6.4–9.5)<0.0001
C-peptide (pmol/ml)1.19 (0.82–1.70)0.92 (0.55–1.28)§1.11 (0.71–1.51)<0.0001
Diabetes by reported history (%)344 (80.2)245 (83.1)298 (87.7)0.02
Family history of diabetes (%)253 (60.1)193 (65.6)219 (65.8)NS
Physician-diagnosed diabetes#
 Age at diabetes diagnosis (years)58 ± 1351 ± 1351 ± 12<0.0001
 Diabetes duration (years)11.1 ± 9.911.7 ± 10.710.6 ± 9.4NS
 Any diabetes medication (%)258 (75.0)191 (78.0)223 (74.8)NS
 Insulin use (%)103 (30)100 (41)§70 (23)0.0004
 Use of OHGAs (%)164 (48)105 (43)§167 (56)0.02
  • *

    * Data are n (%), mean ± SD, or median (interquartile range) for nonnormal variables. Diabetes status based on self-reported history of diabetes, diabetes medication use, or fasting ADA criteria.

  • P < 0.05, non-Hispanic white vs. non-Hispanic black.

  • P < 0.05, non-Hispanic white vs. Mexican American.

  • §

    § P < 0.05, non-Hispanic black vs. Mexican American.

  • 2-h glucose data are based on 176 non-Hispanic whites, 141 non-Hispanic blacks, 201 Mexican Americans.

  • Excludes insulin users, resulting in insulin data on 323 non-Hispanic whites, 195 non-Hispanic blacks, 268 Mexican Americans.

  • #

    # Following data are based on a group of individuals with positive history of diabetes only (344 non-Hispanic whites, 245 non-Hispanic blacks, 298 Mexican Americans).