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Table 4: 
Subsequent ipsilateral events according to stenosis severity and MPRAGE signals: results of 1 year follow-up after initial MRI
StenosisNumber at Initial MRISubsequent Events
Ischemic EventsSurgical TreatmentCensored
Number of low signal intensity carotid arteries
    0%–29% Stenosis9001
    30%–69% Stenosis13000
    70%–99% Stenosis6030
    Total28031
Number of high signal intensity carotid arteries
    0%–29% Stenosis6000
    30%–69% Stenosis7110
    70%–99% Stenosis9350
    Total22460
  • Note:—MPRAGE indicates magnetization-prepared rapid acquisition with gradient echo. Ischemic events include ischemic stroke and transient ischemic attack. Surgical treatment includes carotid endarterectomy and endovascular stenting.