medRxiv
Combined sleep and smell signs linked to Parkinson’s marker
A spinal-fluid test was positive in 94% with a confirmed dream-enactment sleep disorder and reduced smell, versus 40% with the disorder but no reduced smell.A spinal-fluid test was positive in 94% with a confirmed dream-enactment sleep disorder and reduced smell, versus 40% with the disorder but no reduced smell.
Preprint: cohort studyParkinson's disease
Who was studiedPeople with dream-enactment sleep disorder or reduced smell
What changedThe spinal-fluid marker was positive in 94% with sleep disorder and reduced smell versus 40% with sleep disorder alone
The catchThe abstract omits follow-up linking test results to later Parkinson’s diagnoses