Table 2.

Comparison of clinical characteristics and endovascular procedure findings according to preprocedural occlusion types in middle cerebral artery M1 occlusions.

	TTO (n = 41)	BSO (n = 215)	p-value
CLINICAL CHARACTERISTICS
Age, years	62 ± 12	66 ± 13	0.074
Male sex	23 (56.1%)	122 (56.7%)	0.939
Diabetes mellitus	11 (26.8%)	59 (27.4%)	0.936
Hypertension	21 (51.2%)	131 (60.9%)	0.246
Atrial fibrillation	9 (22.0%)	104 (48.4%)	0.002
CAOD	0 (0.0%)	21 (9.8%)	0.037
Hypercholesterolemia	7 (17.1%)	57 (26.5%)	0.201
Smoking	17 (41.5%)	42 (19.5%)	0.002
Admission NIHSS score, median [IQR]	14.0 [8.5–20.5]	16.0 [12.0–20.0]	0.734
ASPECTS, median [IQR]	6.5 [4.0–9.0]	7.0 [5.0–9.0]	0.573
REPERFUSION TREATMENT
IV thrombolysis	21 (51.2%)	113 (52.6%)	0.875
Onset-to-puncture time (min)	386 ± 258	328 ± 233	0.157
Procedure time (min)	75 ± 33	69 ± 42	0.381
Reocclusion after primary treatment	12 (31.6%)	18 (8.5%)	< 0.001
Tirofiban infusion	19 (46.3%)	22 (10.2%)	< 0.001
Intracranial balloon	3 (7.3%)	3 (1.4%)	0.022
Intracranial stenting	2 (4.9%)	7 (3.3%)	0.605
Number of techniques	2.0 [1.0–2.0]	1.0 [1.0–2.0]	0.001
Final AOL grade			< 0.001
0	6 (14.6%)	15 (7.0%)
1	9 (22.0%)	16 (7.5%)
2	16 (39.0%)	37 (17.3%)
3	10 (24.4%)	146 (68.2%)
Successful reperfusion	30 (73.2%)	160 (74.4%)	0.867
Post-procedure reocclusion	2/38 (5.3%)	13/191 (6.8%)	0.725
ANGIOGRAPHIC ANALYSIS OF ETIOLOGY			< 0.001
Complete recanalization	13 (31.7%)	163 (75.8%)
Significant fixed focal stenosis	26 (63.4%)	36 (16.7%)
Intractable	2 (4.9%)	16 (7.4%)
OUTCOMES
Serious hemorrhagic complications	3 (7.3%)	12 (5.6%)	0.665
3-month mRS 0–2	24 (58.5%)	114 (53.3%)	0.535

The data are presented as the mean ± standard deviation, number (%), or median [interquartile range]. TTO, truncal-type occlusion; BSO, branching-site occlusion; CAOD, coronary artery obstructive disease; NIHSS, National Institutes of Health Stroke Scale; ASPECTS, Alberta Stroke Program Early CT score; IV, intravenous; AOL, arterial occlusive lesion; mRS, modified Rankin Scale.