TABLE 3

Prevalence (%) of GAD65 AA positivity by diabetes status and race/ethnicity among subgroups, NHANES III participants

Non-Hispanic whites
Non-Hispanic blacks
Mexican Americans
No diabetesDiabetesNo diabetesDiabetesNo diabetesDiabetes
All diabetes*
n491429239295306340
 Participants age <75 years1.88.21.43.52.71.3
 Participants age ≥75 years3.13.105.300
 C-peptide ≥ 0.2 pmol/ml2.34.40.73.52.61.0
Physician-diagnosed diabetes at ≥40 years of age
n491402239248306296
 All participants2.05.71.33.22.61.4
 Diabetic participants not on insulin2.04.81.32.32.61.3
 Diabetic participants on insulin2.38.71.05.42.61.7
 Participants with C-peptide ≥0.2 pmol/ml2.14.40.93.02.61.4
 Diabetic participants not on insulin and C-peptide ≥0.2 pmol/ml2.14.60.92.42.61.3
  • *

    * Diabetes status based on self-reported history of diabetes, diabetes medication use, or fasting ADA criteria.

  • P < 0.05, diabetic group vs. nondiabetic group.

  • Diabetes status based on positive history of diabetes only (self-reported history of diabetes and current diabetes treatment), and participants in diabetes group limited to those diagnosed after the age of 40.