Table 3. Characteristics of patient subgroups based on volume differences on CT perfusion and non-enhanced follow-up CT.

Core volumes on CTP minus infarct volumes on follow-up NECT (mL)	Subgroup 1 (<−10)	Subgroup 2 (−10 – 10)	Subgroup 3 (>10)
Number of patients	6	12	13
Time from stroke onset to CT (minutes)	77±42	121±78	79±30
Time from CT to mechanical recanalization (minutes)	133±55	114±44	88±27
Core volumes on CTP (mL)	27.6±20.8	15.7±12.8	30.6±21.6
Infarct volumes on follow-up NECT (mL)	72.8±69.5	12.9±14.3	12.9±14.3

Data are reported as mean values ± standard deviation. CT, computed tomography; CTP, CT perfusion; NECT, non-enhanced CT.