“…The SCALLOP registry researchers evidenced that critical hand ischemia (hazard ratio [HR], 4.6; 95% CI, 2.06-10.2; P < .001), along with cerebrovascular disease (HR, 1.9; 95% CI, 1.14-3.06; P ¼ .01), current smoking (HR, 1.8, 95% 1.14-2.79; P ¼ .01), and lesion length (in 1-cm increments; HR, 1.02; 95% CI, 1.00-1.04; P ¼ .03) were negative independent predictors of primary patency, in contrast with intravascular ultrasonography use (HR, 0.6; 95% CI, 0.30-0.96; P ¼ .04), which was a positive predictor of primary patency. 28 Mousa et al 29 showed the following significant predictors of RS: smoking/chronic obstructive pulmonary disease (HR, 3.2; P ¼ .001), vessel diameter 7 mm or less (HR, 2.3; P ¼ .028), age by decade (HR, 0.5; P < .001), discharge with statin therapy (HR, 0.3; P ¼ .001), and right-sided intervention (HR, 0.3; P ¼ .040). This study did not address symptom recurrence.…”