Fig. 1
From: The healthcare costs of treating human papillomavirus-related cancers in Norway
Flow-chart of inclusion and exclusion of patients with HPV-related cancer in three population-based Norwegian registries. Overview of patients included in each of the three population-based patient registries: The Norwegian Patient Registry (NPR), The Norwegian Control and Distribution of Health Reimbursement Database (KUHR) and The Norwegian Prescription Database (NorPD). The exclusion criteria applied varied with the type of registry. We constructed three sub-samples: 1) the ‘General Cost Analysis’, which included patients registered with a HPV-specific main diagnosis in any registry between between 2012 and 2014, 2) for the ‘Incidence-based Cost Analysis’, which included patients in NPR with an HPV-related main diagnosis who had their first episode of care after December 31st, 2011, and 3) the ‘End-of-life Cost Analysis’, which included patients in NPR with an HPV-related main diagnosis who had started treatment at least 12 months prior to dying in between 2012 and 2014