A (age)≥ 60y+1
B (BP)≥ 140/90mmHg+1
C (clinical)Unilateral Weakness+2
Speech Disturbance no Weakness+1
D (duration)10-59 Minutes+1
> 60 Minutes+2
D (diabetes)Diabetes+2
Stroke risk at 2 / 7 / 90 days
0-3low risk1%
4-5moderate risk4.1%
6-7high risk8.1%

Rothwell PM, Giles MF, Flossmann E, Lovelock CE, Redgrave JN, Warlow CP, Mehta Z.
A simple score (ABCD) to identify individuals at high early risk of stroke after transient ischaemic attack.
Lancet. 2005 Jul 2-8;366(9479):29-36