Table 1.
Baseline Characteristics of the Study Population According to Baseline ABI Values
| Definite PAD (ABI <0.90) | Borderline PAD (ABI 0.90 to 0.99) | Low Normal ABI (ABI 1.00 to 1.09) | No PAD (ABI 1.10 to 1.40) | High ABI (ABI >1.40) | |
|---|---|---|---|---|---|
| N (%) | 220 (13.7) | 250 (15.6) | 509 (31.8) | 587 (36.6) | 36 (2.3) |
| Age, y | 80.2±5.5 | 79.2±5.1 | 78.6±5.1 | 78.4±5.2 | 78.7±5.1 |
| Male sex, % | 31.8 | 19.2 | 26.3 | 43.1 | 61.1 |
| African American, % | 24.1 | 23.2 | 19.3 | 14.0 | 8.3 |
| Mean ABI values | 0.75±0.15 | 0.95±0.03 | 1.05±0.03 | 1.18±0.07 | 1.75±0.41 |
| Mean BMI, kg/m2 | 28.7±6.3 | 29.9±6.0 | 30.6±6.1 | 30.7±5.9 | 30.2±6.2 |
| Current smoking, % | 10.2 | 3.3 | 1.8 | 1.6 | 0.0 |
| Ever smoking, % | 57.2 | 44.7 | 49.7 | 45.2 | 44.4 |
| Diabetes mellitus, % | 31.1 | 27.3 | 24.8 | 22.8 | 38.9 |
| Myocardial infarction, % | 11.9 | 9.3 | 6.5 | 6.7 | 11.8 |
| Heart failure, % | 6.4 | 3.6 | 4.1 | 3.6 | 8.6 |
| 20 min/week exercise, % | 22.7 | 15.9 | 17.8 | 19.4 | 25.0 |
| Lung disease, % | 16.9 | 15.3 | 15.8 | 15.5 | 5.6 |
| Mean CHAMPS‐18 Score | 20.0±34.0 | 14.6±30.7 | 15.4±32.1 | 18.1±34.1 | 17.1±32.5 |
ABI indicates ankle brachial index; BMI, body mass index; PAD, peripheral artery disease.