Independent predictors of carotid plaque progression (multivariate logistic regression method backward stepwise)
| OR | 95% CI | P value | |
| Thickness of left carotid plaque (per 1 mm) | 1.541 | 1.230 to 1.930 | 0.0002 |
| Thickness of right carotid plaque (per 1 mm) | 1.369 | 1.062 to 1.772 | 0.019 |
| Age (per 1 year) | 1.026 | 0.995 to 1.058 | 0.100 |
| Smoking | 2.028 | 0.921 to 4.465 | 0.079 |