7 day stroke risk by ABCD scores in OXVASC and clinic validation cohorts*

OXVASC cohort (188 patients with probable or definite TIA)OXVASC cohort (375 patients with suspected TIA)TIA clinic cohort (206 patients with suspected TIA)
ABCD scorePatients with score7 day stroke risk (95% CI)Patients with score7 day stroke risk (CI)Patients with score7 day stroke risk (CI)
*OXVASC  =  Oxford Vascular Study; TIA  =  transient ischaemic attack. CI defined in glossary.
⩽11%0%7%0%9%0%
215%0%20%0%18%0%
317%0%22%0%20%0%
424%2.2% (0 to 6.4)24%1.1% (0 to 3.3)26%9.1% (1.5 to 17)
526%16% (6 to 27)18%12% (4.2 to 20)16%12% (0.9 to 23)
616%36% (19 to 52)9%31% (16 to 47)11%24% (5.6 to 42)