Impact of dopamine deficiency and REM sleep behavior disorder on cognition in early neuronal synuclein disease with hyposmia

The shared code was created to perform analysis for the published article "Impact of dopamine deficiency and REM sleep behavior disorder on cognition in early neuronal synuclein disease with hyposmia” [https://doi.org/10.1101/2024.12.12.24318917]. This code was created to analyze data accessed from the PPMI database (RRID:SCR 006431) on February 05, 2024. As the PPMI database is always evolving, it is possible that the code may not work if the database has changed since the date the code was created. Analytic datasets are not included in the submission. Researchers can request access to PPMI data at the PPMI Study website (https://www.ppmi-info.org/access-data-specimens/download-data).