Table 1. Patient Characteristics.
| Variables | Training Set | Validation Set | Test Set |
|---|---|---|---|
| Mean age (range, years) | 69.5 (24–97) | 75.4 (50–98) | 75.5 (50–96) |
| Male:female | 166:80 | 50:39 | 53:41 |
| Past medical history (%) | |||
| Hypertension | 124 (50.4) | 50 (56.2) | 58 (61.7) |
| Diabetes mellitus | 51 (20.7) | 20 (22.5) | 35 (37.2) |
| Hyperlipidemia | 33 (13.4) | 16 (18.0) | 24 (25.5) |
| Smoking | 128 (52.0) | 36 (40.4) | 36 (38.3) |
| Family history of stroke | 62 (25.2) | 17 (19.1) | 13 (13.8) |
| Body mass index | 24.0 ± 3.0 | 24.0 ± 3.5 | 23.3 ± 3.1 |
| Number of vascular risk factors | 2.4 (0–6) | 2.5 (0–5) | 2.7 (0–5) |
| Time interval to DWI (days)* | 1.0 (0–11) | 0.8 (0–4) | 0.7 (0–5) |
*There were no significant differences in time intervals to DWI among three sets (p > 0.05). DWI = diffusion-weighted imaging