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Table 1: Comparison by final AOL score and optimal number of attempts
Demographic Final AOL Score PValue Optimal Suboptimal PValue
0–1 (n = 23) 2–3 (n = 71) n = 61 n= 33
Age 67.6 ± 18.3 65.0 ± 19.7 .58 65.4 ± 19.8 65.7 ± 18.6 .94
Male sex 11 (47.8) 30 (42.2) .82 25 (41.0) 16 (48.5) .52
Prior history 
    Hypertension 11 (47.8) 41 (57.7) .55 36 (59.0) 16 (48.5) .39
    Diabetes 6 (26.1) 12 (16.9) .51 12 (19.7) 6 (18.2) 1
    Dyslipidemia 5 (21.7) 22 (31.0) .56 19 (31.1) 8 (24.2) .63
    Peripheral vascular disease 1 (4.3) 1 (1.4) .43 1 (1.6) 1 (3.0) 1
    Atrial fibrillation 10 (43.5) 36 (50.7) .72 32 (52.5) 14 (42.4) .39
Time to pass 6:43 ± 2:55 6:57 ± 2:55 .74 7:02 ± 3:05 6:41 ± 2:38 .60
Intravenous thrombolytic 6 (26.1) 21 (29.6) 1 19 (31.1) 8 (24.2) .63
Intra-arterial thrombolytic 3 (13.0) 4 (5.6) .36 3 (4.9) 4 (12.1) .24
Total attempts, median (IQR) 4 (2) 2 (2) <.0001 
Complications 9 (14.8) 14 (42.4) .006
    Subarachnoid hemorrhage 6 (9.8) 10 (30.3) 
    Dissection 1 (1.6) 1 (3.0) 
    Air embolism 1 (1.6) 2 (6.0) 
    Device fracture 2 (3.2) 2 (6.0) 
    Intraventricular hemorrhage 0 2 (6.0) 
    Perforation 1 (1.6) 0 
Parenchymal HT, 72 hours^a 2 (13) 11 (16) 1 10 (19) 3 (10) 0.5
a Eleven patients were not included because they were not able to undergo imaging 72 hours after intervention; none of these patients had HT on post-Merci CT; 7 of these patients had a poor final-outcome AOL score, while 4 had good final-outcome AOL scores. Seven of these patients underwent the optimal number of attempts, while 4 did not.