How Do Occupational Sedentary Behavior and Occupational Cognitive Complexity Relate to Cognitive Function? A...

Area of Science:

• Neuroscience
• Occupational Health
• Gerontology

Background:

• Lower occupational cognitive complexity (OCC) and physical inactivity are linked to cognitive decline in older adults.
• Occupational sedentary time's association with cognitive function needs further clarification, especially after accounting for OCC and education.

Purpose of the Study:

• To examine if occupational sedentary time is associated with cognitive function after adjusting for occupational cognitive complexity (OCC) and education.
• To understand the role of OCC and education in the relationship between occupational sedentary time and cognitive performance.

Main Methods:

• Cross-sectional study of 1821 participants from the Framingham Heart Study, excluding those with dementia, retired, or unemployed.
• Cognitive function assessed using logical memory delayed recall (LMD), WAIS similarities (SIM), and Trail Making Test B-A.
• Occupational sedentary time measured via self-report and accelerometry; OCC assessed using O*NET data. ANCOVA models used for analysis.

Main Results:

• Higher occupational sedentary time initially correlated with better cognitive function (LMD, SIM, Trails B-A).
• After adjusting for education and OCC, the association between occupational sedentary time and cognitive function (LMD, SIM) was attenuated and not statistically significant.
• Occupational cognitive complexity (OCC) was also independently associated with higher cognitive function.

Conclusions:

• The link between higher occupational sedentary time and better cognitive function is partially explained by higher OCC and education.
• Occupations with higher cognitive complexity may foster cognitive resilience, even if they involve more sedentary behavior.