Table 5

 Correlations between pretreatment CT, MRI, clinical variables, and hyperdense artery sign on baseline CT (Spearman’s ρ)

MRI indicesCorrelation coefficientp Value
ADC, apparent diffusion coefficient; CT, computed tomography; DWI, diffusion weighted imaging; EIC, early ischaemic changes; MRI, magnetic resonance imaging; m-RS, modified Rankin scale; NIHSS, National Institutes of Health stroke scale; PWI, perfusion weighted imaging; rCBFI, relative cerebral blood flow index; rMTT, regional mean transit time; rrCBV, relative regional cerebral blood volume; TTP, time to peak.
DWI lesion volume (cm3)0.57 <0.0001
ADC (10−6 mm2/s)−0.140.33
PWI lesion volume (cm3)0.51 <0.0001
TTP (s)0.0030.98
rrCBV−0.040.77
RCBFI−0.200.18
RMTT (s)−0.010.95
EIC (%)0.230.11
NIHSS score0.56 <0.0001
Day 60 m-RS score0.42 0.004