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Multidimensional Depressive Symptom Exposure and Incident Cognitive Decline: A Prospective Cohort Study
Jun Guo1, Shiyu Jiang1, Chenxi Luo1
1Department of Nursing, Zunyi Medical University, Zhuhai Campus, No. 368, Jinwan District, Zhuhai City 519041, Guangdong Province, China, zmc.edu.cn.
Depression and Anxiety
|August 7, 2026
Summary
Depressive symptoms worsen cognitive decline risk over time. Maintaining low symptom severity is crucial for long-term cognitive health.
Area of Science:
- Neuroscience
- Gerontology
- Public Health
Background:
- Depressive symptoms are a modifiable risk factor for cognitive decline.
- Systematic assessment of cumulative exposure, temporal dimensions, and dynamic change of depressive symptoms on cognitive decline is lacking.
Purpose of the Study:
- To systematically evaluate the multidimensional associations of depressive symptom exposure with incident cognitive decline.
- To integrate static accumulation and dynamic evolution frameworks for analyzing depressive symptom exposure.
Main Methods:
- Utilized data from 8847 Health and Retirement Study (HRS) participants.
- Quantified cumulative depressive symptoms using area under the curve (AUC) and identified a cut-point for cumulative burden and high-exposure duration.
- Employed multivariable Cox models to assess hazard ratios for incident cognitive decline risk.
Main Results:
- 2311 incident cognitive decline cases occurred during 3.67 median follow-up years.
- Escalating cumulative depressive exposure, cumulative burden, longest duration, and progressively worsening trends significantly increased cognitive decline risk.
- Highest tertile of exposure showed HR 1.42 (1.28-1.58), cumulative burden ≥0 showed HR 1.34 (1.21-1.49), longest duration showed HR 1.29 (1.12-1.48), and worsening trend showed HR 1.52 (1.25-1.84).
Conclusions:
- The effect of depressive symptoms on cognitive decline is cumulative, time-dependent, and dynamic.
- Sustaining a stable, low-severity depressive symptom profile is essential for lifelong cognitive health.
- Highlights the importance of managing depressive symptoms for preventing cognitive decline.
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