Table 1 Dataset details: the properties of the datasets that were used for model training and testing.
Training set | Validation set | Primary test set | Stroke code test sets | International test set | |||||
|---|---|---|---|---|---|---|---|---|---|
Classification | Segmentation | Classification | Segmentation | Classification | Segmentation | Training hospital | Non-training hospital | ||
Number of studies | 6657 | 377 | 725 | 34 | 792 | 62 | 381 | 247 | 171 |
Number of positive studies (%) | 3314 (49.8%) | All | 372 (51.3%) | All | 384 (48.5%) | All | 168 (44.1%) | 128 (50.2%) | 70 (40.9%) |
Time period of studies | 01/2004–05/2018 | 01/2004–05/2018 | 01/2007–05/2018 | 02/2007–05/2018 | 01/2007–05/2018 | 03/2007–05/2018 | 07/2018–01/2019 | 07/2018–12/2018 | 01/2017–07/2019 |
Number of studies on female patients (%) | 3445 (51.8%) | 176 (46.7%) | 374 (51.6%) | 17 (50.0%) | 404 (51.0%) | 26 (41.9%) | 193 (50.7%) | 129 (52.2%) | 101 (59.1%) |
Mean age in years ± standard deviation (range) | 60.7 ± 18.0 (18–104) | 68.1 ± 14.6 (18–102) | 60.8 ± 17.7 (18–101) | 67.4 ± 18.4 (26–96) | 60.5 ± 18.4 (18–102) | 68.2 ± 15.8 (26–99) | 65.9 ± 16.5 (19–98) | 67.6 ± 17.2 (22–97) | 46.7 ± 21.1 (18–95) |
Median infarct volume in mL (interquartile range; range) | – | 6.42 (0.61–33.28; 0.02–333.06) | – | 6.38 (1.42–36.03; 0.06–276.38) | – | 5.57 (0.78–56.88; 0.03–308.78) | 2.73 (0.47–12.98; 0.04–403.16) | 6.12 (1.03–43.47; 0.10–442.80) | 3.01 (0.75–14.54; 0.07–255.20) |
Number of studies on GE scanners | 5233 | 349 | 568 | 31 | 618 | 57 | 345 | 52 | Unavailable |
Number of studies on Siemens scanners | 1424 | 28 | 157 | 3 | 174 | 5 | 36 | 196 | Unavailable |
