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Table 2: Ipsilateral and contralateral nonstenotic carotid plaque in patients with cryptogenic and cardioembolic stroke
Overall Ischemic Strokes (n = 367 Patients/734 Carotid Arteries) 
Cardioembolic stroke^{^b} (n = 226 patients/452 carotid arteries)
 Ipsilateral stroke Yes No (contralateral/unaffected side)
 Nonstenotic carotid plaque (No.) (%) 35 (16.7) 23 (9.5)
 No nonstenotic carotid plaque (No.) (%) 175 (83.3) 219 (90.5)
 Total (No.) (%)^{^a} 210 (100) 242 (100)
Cryptogenic stroke^{^b} (n = 141 patients/282 carotid arteries)
 Ipsilateral stroke Yes No (contralateral/unaffected side)
 Nonstenotic carotid plaque (No.) (%) 31 (23.9) 24 (15.8)
 No nonstenotic carotid plaque (No.) (%) 99 (76.2) 128 (84.2)
 Total (No.) (%)^{^a} 130 (100) 152 (100)
↵a Note that 16 patients in the cardioembolic group and 11 patients in the cryptogenic group had bilateral and/or posterior circulation strokes that were not confined to the ipsilateral ICA vascular territory. These strokes were, therefore, classified neither as right-sided nor left-sided strokes.
↵b Two-sided P value (derived from the Fisher exact test) = .025 for cardioembolic strokes and .099 for cryptogenic stroke.