Table 5.
Scoring systems derived from ABCD/ABCD2.
| Study | Additional variables | Study type | Study population | Index event | Outcome | Validation studies |
|---|---|---|---|---|---|---|
| ABCD2 + MRI | DWI imaging lesion and vessel occlusion status | Prospective cohort (41) | 180 patients | TIA or stroke | Recurrent stroke and functional impairment at 90 days | – |
| Clinical and Imaging-based model (CIP) | DWI | Prospective cohort (42) | 601 patients | TIA | Stroke at 7 days | – |
| ABCD2-I | Brain infarction on imaging: either DWI (acute infarction) or CT (any infarction irrespective of presenting symptom) | A multicenter study with pooled analysis of unpublished data from 12 centers over 11 year period (46) | 4,574 patients | TIA | Stroke at 7 and 90 days | 2/2 |
| ABCD3 | Dual transient ischemic attack | Pooled international multicenter analysis of prospective cohorts (48) | 2,654 patients | TIA | Stroke at 2, 7, 28, and 90 days | 2/2 |
| ABCD3-I | >= 50% stenosis on carotid imaging; Abnormal DWI |
Pooled international multicenter analysis of prospective cohorts (48) | 2,654 patients | TIA | Stroke at 2, 7, 28, and 90 days | 6/6 |
| ABCDE+ | Etiology and DWI positivity | Prospective cohort (71) | 248 patients | TIA | Stroke or recurrent TIA within 90 days | 2/2 |