Table 1.
Demographics and clinical characteristics of stroke-free participants of the Atherosclerosis Risk in Communities (ARIC) Study who were imaged by carotid ultrasound and brain MRI at visit 3 (1993–1995)
| Black study participants | White study participants | |||||
|---|---|---|---|---|---|---|
| CCA-IMT ≤0.9 | CCA-IMT >0.9 | CCA-IMT ≤0.9 | CCA-IMT >0.9 | |||
| Characteristic | N = 541 | N = 100 | P value | N = 634 | N = 68 | P value |
| Demographics | ||||||
| Age | 62 ± 5 | 63 ± 4 | 0.009 | 63 ± 4 | 65 ± 4 | <0.0001 |
| Male | 195 (36%) | 48 (48%) | 0.02 | 248 (39%) | 33 (49%) | 0.1 |
| Medical history | ||||||
| Current smoking | 106 (20%) | 18 (18%) | 0.7 | 115 (18%) | 11 (16%) | 0.7 |
| Hypertension | 315 (59%) | 72 (72%) | 0.01 | 181 (29%) | 36 (53%) | <0.0001 |
| Systolic blood pressure | 131 ± 20 | 138 ± 24 | 0.006 | 122 ± 18 | 131 ± 19 | <0.0001 |
| Diastolic blood pressure | 75 ± 11 | 74 ± 11 | 0.4 | 68 ± 10 | 69 ± 10 | 0.7 |
| Diabetes mellitus | 106 (20%) | 35 (35%) | 0.0004 | 51 (8%) | 9 (13%) | 0.1 |
| Total cholesterol (mg/dl) | 209 ± 41 | 209 ± 40 | 0.9 | 211 ± 37 | 207 ± 36 | 0.4 |
| Common carotid artery (mm) | ||||||
| Intima-media thickness, right | 0.7 ± 0.1 | 1.1 ± 0.3 | 0.7 ± 0.1 | 1.1 ± 0.4 | ||
| Intima-media thickness, left | 0.7 ± 0.1 | 1.0 ± 0.2 | 0.7 ± 0.1 | 1.0 ± 0.3 | ||
Abbreviation: CCA-IMT, intima medial thickness of the common carotid artery.