“… 2 , 28 , 32 , 36 , 39 , 44 , 46 Six studies compared the outcomes of an older cohort to a younger cohort. 4 , 18 , 27 , 32 , 36 , 38 Seven studies analyzed the outcomes of patients over the age of 80 years. 4 , 11 , 14 , 15 , 18 , 38 , 44 The MINORS score for noncomparative studies was 9.2, which indicates a low quality of evidence.…”