The intervention was also not associated with improved neurological status of full recovery or mild impairment at discharge for either patients with VF ( 57.5 % [ 95 % CI , 51.8 % -63.1 % ] of cases had full recovery or mild impairment vs 61.9 % [ 95 % CI , 56.2 % -67.2 % ] of controls ; P = .69 ) or those without VF ( 14.4 % [ 95 % CI , 11.3 % -18.2 % ] of cases vs 13.4 % [ 95 % CI ,10.4 % -17.2 % ] of controls ; P = .30 ) .