The hazard ratio ( HR ) for retreatment after EVT was 6.9 ( 95 % CI = 3.4 to 14.1 ) after adjustment for age ( P = 0.001 , HR = 0.97 , 95 % CI = 0.95 to 0.98 ) , lumen size ( P = 0.006 , HR = 1.1 , 95 % CI = 1.03 to 1.18 ) , and incomplete occlusion ( P < 0.001 , HR = 7.6 , 95 % CI = 3.3 to 17.5 ) .
