Age and sex-adjusted carotid IMT and diameter measurements and prevalence of carotid plaque in the 2 ethnic groupsa
| Black Individuals | White Individuals | P Value | |
|---|---|---|---|
| Mean CCA-IMT (mm) | |||
| LCCA | 0.817 ± 0.009 | 0.771± 0.010 | .001 |
| RCCA | 0.790 ± 0.008 | 0.729 ± 0.009 | .000 |
| Mean CCA | 0.804 ± 0.008 | 0.750 ± 0.008 | .000 |
| Maximum CCA-IMT (mm) | |||
| LCCA | 0.970 ± 0.022 | 0.810 ± 0.021 | .000 |
| RCCA | 0.899 ± 0.027 | 0.741 ± 0.015 | .000 |
| Mean CCA | 0.940 ± 0.020 | 0.770 ± 0.015 | .000 |
| Maximum BIF/ICA-IMT (mm) | |||
| LBIF | 0.778 ± 0.020 | 0.685 ± 0.010 | .000 |
| RBIF | 0.760 ± 0.020 | 0.657 ± 0.010 | .000 |
| Mean BIF | 0.780 ± 0.020 | 0.676 ± 0.010 | .000 |
| Mean ICA | 0.659 ± 0.010 | 0.574 ± 0.010 | .000 |
| CCA diameter (cm) | |||
| LCCA | 0.592 ± 0.005 | 0.618 ± 0.005 | .000 |
| RCCA | 0.599 ± 0.004 | 0.624 ± 0.005 | .000 |
| Mean CCA | 0.596 ± 0.004 | 0.621 ± 0.005 | .000 |
| Carotid plaque (No.) (%) | 17 (5.6) | 34 (12.1) | .004 |
a Values are mean ± SE. IMT results are from semiautomated analysis of an arterial segment giving a value of mean CCA-IMT and from the manual measurement of the single maximum value (maximum IMT) for CCA, BIF, and ICA. CCA diameters are from manual measurements taken during systole.