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TABLE 1: 
Clinical and demographic variables
VariableNormal MR Images (n = 7)Abnormal DWIs and/or PWIs (n = 15)Mismatch (n = 7)
Mean age ± SD (y)66 ± 2162 ± 1061 ± 9
Mean duration ± SD (h)0.6 ± 0.53.3 ± 52.5 ± 4.4
Average no. of TIAs1 ± 12 ± 12 ± 1
Time to MR imaging ± SD (min)33 ± 1956 ± 5875 ± 79
Sex
    Male384
    Female473
Prior stroke142
Prior TIA122
Hypertension5116
Diabetes mellitus173
Coronary artery disease244
Hyperlipidemia2106
Tobacco032
Aphasia253
Hemiparesis2116
Paresthesias243
Cephalalgia222