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Process of case ascertainment (A) and calculation of the PPV and sensitivity (B).
Abbreviations: AHS, acute hemorrhagic stroke; FN, false negative; FP, false positive; ICD-10-CM, International Classification of Diseases, Tenth Revision, Clinical Modification; ICH, intracerebral hemorrhage; Neg, negative; Pos, positive; PPV, positive predictive value; SAH, subarachnoid hemorrhage; TN, true negative; TP, true positive.
