Validity of First-Time Diagnoses of Inherited Ichthyosis in the Danish National Patient Registry and the Danish Pathology Registry.
Mattias Hedegaard KristensenSigrun Alba Johannesdottir SchmidtLine KibsgaardHanne HoveMette SommerlundUffe KoppelhusPublished in: Clinical epidemiology (2020)
The PPV of first-time diagnosis of inherited ichthyosis made at specialized dermatological departments in the Danish National Patient Registry is approximately 80%. Diagnoses from the Danish Pathology Registry had low PPVs precluding their use for research.