Table 1.
Internal and External Data Sets in the algorithm development.
| Derivation cohort (n = 2,369) | External cohort (KM) (n = 350) | External cohort (YN) (n = 329) | |
|---|---|---|---|
| Age in years, mean (SD) | 72.9 (13.5) | 71.8 (13.3) | 71.3 (12.4) |
| Male (%) | 1,340 (56.6) | 193 (55.1) | 200 (60.8) |
| Core volume in mL*, median (IQR) | 19.7 (9.4–54.0) | 19.6 (9.7–55.5) | 19.6 (8.9–49.2) |
| Labels | |||
| Diffusion-FLAIR match (%) | 1,443 (60.9) | 213 (60.8) | 160 (48.6) |
| Diffusion-FLAIR mismatch (%) | 289 (12.2) | 23 (6.6) | 69 (21.0) |
| Subtle FLAIR change (%) | 410 (17.3) | 63 (18.0) | 54 (16.4) |
| Regional heterogenous FLAIR change (%) | 227 (9.6) | 51 (14.6) | 46 (14.0) |
*Estimated core volume of cerebral infarction based on segmentation model14.