New DWI lesions after CAS according to age or presenting event and treatment
| Variable | Unprotected | Protected | P |
|---|---|---|---|
| Age ≤75 y | |||
| No. of lesions | 52 | 138 | |
| 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 lesions | 16 | 37 | |
| 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 lesions | 47 | 87 | |
| 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 lesions | 21 | 88 | |
| 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.