Table 4

Multivariable logistic regression

Independent variable	Beta coefficient	OR	Lower 95% CI	Upper 95% CI	P value
Late dilators*	2.9	17	1.4	229	0.03
No dilators*	5.2	173	2.2	13,331	0.02
Carotid atherosclerosis	2.7	15	1.3	184	0.03

*Risk versus early dilators.