Imaging characteristics by time from last seen well to MRI

0 to <3 Hours (n = 21)3–6 Hours (n = 70)0–6 Hours (Entire Cohort) (n = 91)P Value (Difference, 0–3 vs 3–6)
Age (yr) (median) (IQR)58 (54–77)73 (63.25–83)70 (59–82).034
NIHSS (median) (IQR)13 (11–19)17 (13–22.75)17 (12–21.5).050
CT ASPECTS (median) (IQR)9 (7–10)8 (I6–9)8 (6–9).202
CT ASPECTS ≥7 (No.) (%)17/20 (85%)42/61 (69%)59/81 (72%).159
CTA collaterals >50% (No.) (%)14/19 (74%)37/57 (65%)51/76 (67%).481
DWI volume (mL) (median) (IQR)24.7 (13.9–63.8)29.4 (12.1–68.5)29.2 (12.3–68.5).906
MRI DWI volume ≥70 mL of DWI volume (No.) (%)5 (23.8%)16 (22.8%)21 (22.8%).928
MRI DWI volume ≥100 mL of DWI volume (No.) (%)4 (19%)13 (18.6%)17 (18.7%).961
Terminal ICA occlusion (No.) (%)5 (23.8%)18 (25.7%)23 (25.3%).961
Proximal M1 occlusion (No.) (%)5 (23.8%)21 (30%)26 (28.6%).706
Distal M1 occlusion (No.) (%)11 (52.4%)31 (44.3%)42 (46.1%).393