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Table 2: ROC curve AUC for SPIRAL map, stratified by CT-to-reperfusion time for cortical gray and white matter tissue
Statistic AUC, Patient Level AUC, Cohort Level Cross-Validation Sensitivity Cross-Validation Specificity Cross-Validation Accuracy
Early reperfusion, <90 minutes  (n = 48 patients) 
 Mean 0.83 0.82 0.82 0.72 0.77
 SD 0.14 NA 0.06 0.03 0.06
Late reperfusion, >90 minutes  (n = 24 patients) 
 Mean 0.84 0.81 0.79 0.70 0.74
 SD 0.11 NA 0.08 0.06 0.07
Note:—NA indicates not applicable.

Statistic	AUC, Patient Level	AUC, Cohort Level	Cross-Validation Sensitivity	Cross-Validation Specificity	Cross-Validation Accuracy
Early reperfusion, <90 minutes (n = 48 patients)
Mean	0.83	0.82	0.82	0.72	0.77
SD	0.14	NA	0.06	0.03	0.06
Late reperfusion, >90 minutes (n = 24 patients)
Mean	0.84	0.81	0.79	0.70	0.74
SD	0.11	NA	0.08	0.06	0.07