No patients had a modified Rankin scale score of 0 to 2 ( survival with no disability or slight disability ) ; 7 % of patients in the surgery group and 3 % of patients in the control group had a score of 3 ( moderate disability ) ; 32 % and 15 % , respectively , had a score of 4 ( moderately severe disability [ requirement for assistance with most bodily needs ] ) ; and 28 % and 13 % , respectively , had a score of 5 ( severe disability ) .