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Table 2: 
New DWI lesions after CAS according to age or presenting event and treatment
VariableUnprotectedProtectedP
Age ≤75 y
    No. of lesions52138
    Median (interquartile range)1 (0–4)0 (0–2)<.01
    No. of procedures with any new ipsilateral DWI lesion, n/N (%)35/52 (67)64/138 (46)<.05
Age >75 y
    No. of lesions1637
    Median (interquartile range)1.5 (0–5.75)1 (0–4).6
    No. of procedures with any new ipsilateral DWI lesion, n/N (%)11/16 (69)27/10 (73).7
Symptomatic patients
    No. of lesions4787
    Median (interquartile range)2 (0–6)1 (0–3)<.05
    No. of procedures with any new ipsilateral DWI lesion, n/N (%)35/47 (74)49/87 (56)<.05
Asymptomatic patients
    No. of lesions2188
    Median (interquartile range)1 (0–2.5)0 (0–2).6
    No. of procedures with any new ipsilateral DWI lesion, n/N (%)11/21 (52)42/88 (48).8
  • Note:—DWI indicates diffusion-weighted imaging; CAS, carotid angioplasty and stent placement.