At 455 days , at least 1 target aneurysm recurrence event had occurred in 14.6 % of patients treated with bare metal coils and 13.3 % of Matrix ( 2 ) ( P = .76 , log-rank test ) patients ; 92.8 % of target aneurysm recurrence events were re-interventions for aneurysms that had not bled after treatment , and 5.8 % of target aneurysm recurrence events resulted from hemorrhage or rehemorrhage , with or without retreatment .