Prevalence and likelihood ratios (LRs) for stroke at 2, 7, and 90 days after a transient ischaemic attack using the unified ABCD2 risk score*

Risk group (score)2 day stroke7 day stroke90 day stroke
*LR defined in glossary and calculated from data in article. Results combined from 2 derivation and 4 validation cohorts.
Low (0–3)1.0%0.261.2%0.213.1%0.31
Moderate (4–5)4.1%1.15.9%1.19.8%1.1
High (6–7)8.1%2.212%2.318%2.1