Clinical Report: Prediagnostic Parkinson clues differ in strength
Overview
A large electronic health record analysis identified REM sleep behavior disorder, mild cognitive impairment, and orthostatic hypotension as significant nonmotor features preceding Parkinson disease diagnosis. Among these, REM sleep behavior disorder exhibited the strongest association with subsequent diagnosis.
Background
Understanding the nonmotor features that precede Parkinson disease (PD) diagnosis is crucial for early identification. This study highlights specific symptoms, such as REM sleep behavior disorder, which may serve as early indicators of PD.
Data Highlights
Feature
Cases (%)
Controls (%)
Odds Ratio
REM sleep behavior disorder
2.7
0.2
9.68
Mild cognitive impairment
4.8
0.9
4.10
Orthostatic hypotension
5.6
2.2
1.83
Key Findings
REM sleep behavior disorder was documented in 2.7% of PD cases versus 0.2% of controls, with nearly 10-fold higher odds of PD.
Mild cognitive impairment was present in 4.8% of PD cases compared to 0.9% of controls, associated with approximately 4-fold higher odds.
Orthostatic hypotension occurred in 5.6% of PD cases versus 2.2% of controls, with 83% higher primary conditional odds.
Depression and anxiety were less consistently associated with PD, with 31.1% and 28.5% of cases documented, respectively.
All three significant features remained stable across multiple sensitivity analyses.
The timing of first documentation varied, with REM sleep behavior disorder recorded a median of 1.07 years before PD diagnosis.
Clinical Implications
Clinicians should be aware of the significance of REM sleep behavior disorder, mild cognitive impairment, and orthostatic hypotension as potential early indicators of Parkinson disease. Enhanced documentation and recognition of these features in routine care may facilitate earlier diagnosis and management.
Conclusion
The study emphasizes the role of specific nonmotor features in the early identification of Parkinson disease, particularly highlighting the strong association of REM sleep behavior disorder.
The age-adjusted Parkinson disease death rate among US adults aged 65 years and older was 72.0 deaths per 100,000 standard population in 2024, lower than the 2021 rate, according to a National Center for Health Statistics Data Brief.
