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Table 5 Validation of diagnostic codes for intracranial hemorrhage

From: Validation of diagnostic codes of major clinical outcomes in a National Health Insurance database

Intracranial hemorrhageTotalTrueFalsePPV (%)Sensitivity (%)Specificity (%)
Hospitalization + primary diagnostic code200 (100)143 (71.5)57 (28.5)71.5
Hospitalization + primary diagnostic code + imaging diagnosisa167 (100)136 (81.4)31 (18.6)81.495.145.6
Hospitalization + primary diagnostic code + prescriptionb179 (100)129 (72.1)50 (27.9)72.190.212.3
Hospitalization (over 3 days) + primary diagnostic code + imaging diagnosis153 (100)127 (83.0)26 (17.0)83.088.854.4
Hospitalization (over 3 days) + primary diagnostic code + prescription142 (100)118 (83.1)24 (16.9)83.182.557.9
  1. PPV positive predictive value
  2. aBrain imaging studies including a computed tomography (CT) scan or a magnetic resonance imaging (MRI)
  3. bNo prescription of any antithrombotic agents at discharge