Fig 1.
‘N’ and ‘N*’ indicates the number of patients and cases, respectively.
Table 1.
Operational definitions of key identifiers.
Fig 2.
Proportions of principal diagnosis codes at admission.
Abbreviations: TIA, transient ischemic attack; CVD, cerebrovascular diseases.
Fig 3.
Sensitivity, specificity and frequency of key identifiers.
Abbreviations: AF, atrial fibrillation; CTA, CT angiography; F/U, follow up; IVT, intravenous thrombolysis; EVT, endovascular treatment; CEA, carotid endarterectomy; 3D, 3 days; 7D, 7 days; 90D, 90 days; NR, Neurology; NS, Neurosurgery; OPD, out-patient department; Rehab, rehabilitation.
Fig 4.
Stroke identification algorithm according to principal diagnosis code with (A) I63 and brain CT, (B) with I63 and brain CT, and (C) without I63.
The number of cases selected by each step (the percent of the true AIS cases among the selected cases) is presented on each arrow.
Table 2.
Matched proportion in development and validation set.