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Comparison of Stroke Prediction Accuracy of ABCD2 and ABCD3-I in Patients with Transient Ischemic Attack: A
Meng Zhao1, Shuo Wang1, Dong Zhang1
1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing, China; Center of Stroke, Beijing Institute for Brain Disorders, Beijing, China.
Insights
The ABCD3-I score shows higher sensitivity for predicting stroke after transient ischemic attack (TIA) than the ABCD2 score. However, the ABCD2 score is more suitable for initial triage in community settings due to better specificity.
Area of Science:
- Neurology
- Clinical Diagnostics
- Epidemiology
Background:
- Direct comparison of stroke prediction utility between ABCD2 and ABCD3-I scores is lacking.
- Transient ischemic attack (TIA) risk stratification is crucial for timely intervention.
- Assessing diagnostic accuracy of TIA scoring systems is vital for patient management.
Purpose of the Study:
- To directly compare the stroke prediction accuracy of ABCD2 and ABCD3-I scores.
- To evaluate the performance of these scores in a hypothetical cohort of 1000 TIA patients.
- To inform clinical triage and stroke prevention strategies.
Main Methods:
- Diagnostic meta-analysis of studies comparing ABCD2 and ABCD3-I scores.
- Searched Medline, PubMed, Embase, and reference lists for relevant studies.
- Bivariate random effects models used to assess pooled sensitivity and specificity.
- Application of results to a hypothetical cohort of 1000 TIA patients.
Main Results:
- Six studies (7364 participants) directly compared ABCD2 and ABCD3-I.
- ABCD3-I demonstrated significantly higher pooled sensitivity at 7 days (96.1%) and 90 days (94.6%) versus ABCD2 (79.9% and 76.6%).
- ABCD2 showed higher pooled specificity at 90 days (40.3%) compared to ABCD3-I (20.2%), though not significant at 7 days.
Conclusions:
- ABCD3-I offers superior sensitivity for stroke prediction post-TIA.
- ABCD2 demonstrates better specificity, making it more suitable for initial triage in community settings.
- Consider individual score components over dichotomized scores for nuanced clinical decision-making.
Background:
A direct comparison of the stroke prediction utility of the ABCD2 and ABCD3-I scores has not been performed. Thus, we conducted a diagnostic meta-analysis and applied the results to a hypothetical cohort of 1000 patients with transient ischemic attack (TIA) to assess the power of stroke prediction by ABCD2 and ABCD3-I scores.
Methods:
Medline, PubMed, Embase, and manuscript references were searched to identify studies that directly compared the stroke predictive powers of ABCD2 and ABCD3-I scores. We conducted a diagnostic meta-analysis using bivariate random effects models, and the predictive powers of ABCD2 and ABCD3-I scores were assessed by their summary sensitivity and specificity. Then, we applied the results to a hypothetical cohort of 1000 patients with TIA to calculate the effect per 1000 patients triaged for stroke prevention in a virtual setting.
Results:
Of the 35 identified studies on ABCD2 and ABCD3-I, 6 studies (7364 participants) directly compared the diagnostic accuracies of ABCD2 and ABCD3-I scores for occurrence of a future stroke. The pooled sensitivities of ABCD2 versus ABCD3-I were 79.9% (62.2%-90.6%) versus 96.1% (90.2%-98.5%) at 7 days (P = .022), and 76.6% (63.8%-85.8%) versus 94.6% (88.9%-97.5%) at 90 days (P = .001). The pooled specificities of ABCD2 versus ABCD3-I were 29.2% (18.2%-43.3%) versus 17.7% (8.5%-33.3%) at 7 days (P = .214), and 40.3% (25.0%-57.7%) versus 20.2% (12.6%-30.6%) at 90 days (P = .032).
Conclusions:
ABCD3-I scores had a better sensitivity but poorer specificity than ABCD2 scores. However, in community-based referring settings, it is more suitable to use ABCD2 at initial triage and deciding on urgency of specialist assessment. The prognostic utility of each of the components of the scores should be carefully considered rather than dichotomized scores during clinical triage.
