Differences in Parkinson's disease treatment between neurology and other departments in Japan

AbstractBackgroundParkinson's disease is common in elderly people and is treated in the neurology department as well as in other departments. Recently, treatment options for Parkinson's disease have expanded; this complicates selection of the best treatment regimen.AimTo investigate the change in Parkinson's disease treatment in Japan and assess the differences in prescriptions between neurology and other departments.MethodsPatients with Parkinson's disease who were prescribed levodopa and/or non‐ergot dopamine agonist were analyzed in an observational study using a Japanese claims database (April 2008–July 2017). The percentage of patients receiving each antiparkinsonian drug and the proportion of patients prescribed levodopa alone, levodopa plus non‐ergot dopamine agonist, and non‐ergot dopamine agonist alone were calculated by year (2010–2017) and department (neurology or other departments).ResultsWe identified 50,408 patients (mean [standard deviation] age: 73.4 [10.3]), including 25,231 (71.3 [10.1]) and 25,177 (75.5 [10.2]) patients who received their initial Parkinson's disease treatment in neurology and other departments, respectively. The popularity of levodopa alone and l