Cardio-embolism 89 (26.7) 8 (13.8) 81 (29.3) 0.015 Isolated patent foramen ovale 22 (6.6) 2 (3.4) 20 (7.2) 0.39 Cervical dissection 38 (11.4) 4 (6.9) 34 (12.3) 0.36 Cervical atherosclerosis 13 (3.9) 2 (3.4) 11 (4) 1.00 Intracranial arterial stenosis 66 (19.8) 26 (44.8) 40 (14.5) <0.00001 Immunological/hematological 14 (4.2) 2 (3.4) 12 (4.3) 1.00 Small vessel disease 3 (0.9) 1 (1.7) 2 (0.7) 0.44 Intracranial aneurism 2 (0.6) 0 2 (0.7) 1.00 Undetermined 87 (26) 13 (22.4) 74 (26.8) 0.49 Clinical symptoms on admission Table 1 Comparison of Clinical Characteristics and Outcome of Young Ischemic Stroke Patients Between CU and NCU Values are n (%) except for the outcome 3-month mRS, which is expressed by the median (1st quartile-3rd quartile).The 3-month modified Rankin scale (mRS) included 283 patients because data were not available in patients recently enrolled in the study or lost during the follow-up.