(a) Female.
(b) Male.
Positional variance diagram of the central ordering. The x-axis is the event position. Difference in ordering may be attributed to the strong effect of gender on some of these outcomes.
Abbreviations: PIGD, Posture Instability and Gait Difficulty; REM Sleep, Rapid Eye Movement Sleep behavior disorder; UPSIT, University of Pennsylvania Smell Identification Test; SCOPA, Scale for Outcomes in Parkinson’s; UPDRS, Unified Parkinson Disease Rating Scale; PD, Parkinson Disease; HC, Healthy Control.