Thrombectomy reduced the severity of disability over the range of the modified Rankin scale ( adjusted odds ratio for improvement of 1 point , 1.7 ; 95 % confidence interval [ CI ] , 1.05 to 2.8 ) and led to higher rates of functional independence ( a score of 0 to 2 ) at 90 days ( 43.7 % vs. 28.2 % ; adjusted odds ratio , 2.1 ; 95 % CI , 1.1 to 4.0 ) .