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Table 1 Characteristics of ABI reliability study subjects compared with the ARIC study cohort

From: The reliability of the ankle-brachial index in the Atherosclerosis Risk in Communities (ARIC) study and the NHLBI Family Heart Study (FHS)

  ARIC baseline survey ARIC visit 3
Characteristic ARIC Minneapolis and Forsyth County
(N = 8044)
ABI reliability study
(N = 119)
ARIC Minneapolis and Forsyth County
(N = 6839)
ABI reliability study
(N = 119)
Age, y* 54.2 (5.79) 55.0 (5.68) 60.2 (5.73) 61.0 (5.67)
Female, % 52.8 58.8 53.4 58.8
Race/ethnicity, %     
   White 93.3 84.0§ 94.5 84.0§
   African American 6.3 16.0 5.1 16.0
   American or Alaskan Indian 0.1 0 0.1 0
   Asian or Pacific Islander 0.3 0 0.3 0
Field center, %     
   Forsyth County, NC 50.2 64.7 48.9 64.7§
   Minneapolis, Minn 49.8 35.3 51.1 35.3
Weight, kg* 76.0 (16.21) 75.7 (15.63) 78.1 (16.79) 78.4 (17.12)
Body mass index, kg/m2* 26.7 (4.73) 27.0 (4.78) 27.6 (5.03) 28.1 (5.34)
Diabetes, % 6.7 7.6 12.0 11.8
Smoking status, %     
   Current 26.8 23.5 18.2 19.3
   Former 35.7 33.6 44.8 42.9
   Never 37.5 42.9 37.0 37.8
Hypertension, % 26.6 26.9 34.4 35.3
Coronary heart disease, % 4.6 18.0§ 6.8 23.7§
Ankle brachial index* 1.14 (0.130) 1.13 (0.137) 1.19 (0.150) 1.17 (0.150)
  1. *Numbers presented are mean (SD).
  2. ARIC participants with a visit 3 (6-year follow-up); for the ABI, N = 2295.
  3. 0.001 ≤ p < 0.01 for chi-square test comparing sample to source study population.
  4. § p < 0.001