ABCD score

ABCD score

A clinical testing instrument used outside of a hospital setting for people at high risk of stroke after a transient ischaemic attack.

ABCD score calculation
A: Age (≥ 60 years, 1 point);
B: Blood pressure at presentation (≥ 140/90 mmHg, 1 point);
C: Clinical features (unilateral weakness, 2 points; speech disturbance without weakness, 1 point);
D: Duration of symptoms (≥ 60 minutes, 2 points; 10— 59 minutes, 1 point).

Total scores range from 0 (low) risk to 7 (high risk).

ABCD score

A clinical prediction value that estimates the likelihood of stroke in a patient who has had a transient ischemic attack. Its elements include: A (age greater than or less than 60); B (blood pressure above 140 mm Hg systolic or 90 diastolic); C (clinical features such as one-sided body weakness or speech disturbance); and D (duration of symptoms: 60 min, 10-60 min, or less than 10 min).
Synonym: ABCD prediction rule; ABCD rule
References in periodicals archive ?
The ABCD score also can help the general public and first responders learn which specific traits signal high stroke risk, since awareness of the need for urgent medical attention with TIA is so poor, according to Peter M.
Factoring in other known stroke risk factors, such as diabetes, angina, previously diagnosed atrial fibrillation, smoking, and male gender, did not contribute significantly to the accuracy of the ABCD score system.
The ABCD score was highly predictive of imminent stroke in all three study cohorts.
The patient's stroke risk rose with every 1-point increase in the ABCD score.
In addition, the relatively high risk of stroke (roughly 30%) associated with a maximum ABCD score of 6 should now require "not only emergency investigation and treatment but also admission to hospital during the acute phase [of TIA].
Emergency hospitalization of all patients with an ABCD score of 6 should be possible in most health care systems, given that there are relatively few such patients--9% of all the subjects in these two large validation cohorts, "or 16 patients per 100,000 population per year," the investigators added.
These predictive factors have been combined to create an ABCD score as a way of quantifying this risk.
The risk of stroke within seven days of TIA was over 30% in patients with a high ABCD score, whereas there were no early strokes in patients with low scores.
Professor Peter Rothwell, the unit's director, said, 'The ABCD score can be used in routine clinical practice to identify high-risk individuals who need emergency investigation and treatment.