Table 1.
Patient characteristics.
| All | (%) | ICH + | (%) | Aidoc Incorrect |
(%) | |
|---|---|---|---|---|---|---|
| Total | 3605 | 100 | 349 | 100 | 101 | 100 |
| Sex | ||||||
| Male | 1762 | 48.9 | 205 | 58.7 | 60 | 59.4 |
| Female | 1843 | 51.1 | 144 | 41.3 | 41 | 40.6 |
| Age (mean, SD) | (SD) | (SD) | (SD) | |||
| All | 60.6 | 20.7 | 63 | 19.7 | 67.5 | 19.1 |
| Male | 58.1 | 20.1 | 59 | 19.2 | 64.4 | 19.3 |
| Female | 62.9 | 21.0 | 69 | 18.8 | 72 | 18.1 |
| Prior neurosurgery | ||||||
| yes | 267 | 7.4 | 38 | 11 | 81 | 80.2 |
| No | 3338 | 92.6 | 311 | 89 | 20 | 19.8 |
| CT Scanner | 0.0 | |||||
| 1 | 82 | 2.3 | 5 | 1.4 | 3 | 3.0 |
| 2 | 72 | 2.0 | 8 | 2.3 | 3 | 3.0 |
| 3 | 252 | 7.0 | 22 | 6.3 | 6 | 5.9 |
| 4 | 346 | 9.6 | 48 | 13.8 | 10 | 9.9 |
| 5 | 2085 | 57.8 | 232 | 66.5 | 62 | 61.4 |
| 6 | 723 | 20.1 | 29 | 8.3 | 17 | 16.8 |
| 7 | 45 | 1.2 | 5 | 1.4 | 0 | 0.0 |
| NCCT indication | ||||||
| Trauma | 2064 | 57.3 | 173 | 49.6 | 60 | 59.4 |
| Altered mental status | 525 | 14.6 | 25 | 7.2 | 12 | 11.9 |
| Headache | 389 | 10.8 | 15 | 4.3 | 9 | 8.9 |
| Neurologic | 241 | 6.7 | 16 | 4.6 | 5 | 5.0 |
| Repeat study | 137 | 3.8 | 113 | 32.4 | 6 | 5.9 |
| Seizure | 104 | 2.9 | 3 | 0.9 | 4 | 4.0 |
| Loss of consciousness | 69 | 1.9 | 2 | 0.6 | 2 | 2.0 |
| Infection | 20 | 0.6 | 2 | 0.6 | 2 | 2.0 |
| Other | 56 | 1.6 | 0 | 0.0 | 1 | 1.0 |
| ICH type | ||||||
| No ICH | 3256 | 90.3 | 0 | 0.0 | 74 | 73.3 |
| Any ICH | 349 | 9.7 | 349 | 100.0 | 27 | 26.7 |
| Single ICH | 226 | 6.3 | 226 | 64.8 | 26 | 25.7 |
| SDH | 91 | 2.5 | 91 | 26.1 | 14 | 13.9 |
| SAH | 72 | 2.0 | 72 | 20.6 | 5 | 5.0 |
| IPH | 33 | 0.9 | 33 | 9.5 | 5 | 5.0 |
| Other | 30 | 0.8 | 30 | 8.6 | 2 | 2.0 |
| Univariable analysis |
Multivariable Analysis |
|||||
| IVH | 10 | 0.3 | 10 | 2.9 | 0 | 0.0 |
| Hem. Met. | 9 | 0.2 | 9 | 2.6 | 1 | 1.0 |
| Extra-axial (not specified) | 8 | 0.2 | 8 | 2.3 | 1 | 1.0 |
| EDH | 2 | 0.1 | 2 | 0.6 | 0 | 0.0 |
| Subependymal | 1 | 0.0 | 1 | 0.3 | 0 | 0.0 |
| Mixed ICH | 123 | 3.4 | 123 | 35.2 | 1 | 1.0 |
SD: standard deviation, NCCT: non-contrast head CT, ICH: intracranial hemorrhage, ICH+: positive intracranial hemorrhage, SDH: subdural hemorrhage, SAH: subarachnoid hemorrhage, IPH: intraparenchymal hemorrhage, IVH: intraventricular hemorrhage, Hem. Met: Hemorrhagic metastases, EDH: Epidural hematoma.