Association between surgery with anesthesia and cognitive decline in older adults: Analysis using shared parameter...

Area of Science:

• Gerontology
• Neuroscience
• Biostatistics

Background:

• Cognitive decline in older adults is a significant concern.
• The impact of general anesthesia on cognition remains debated.
• Longitudinal studies are crucial for understanding cognitive trajectories.

Purpose of the Study:

• To re-examine the association between general anesthesia and cognitive function in older adults.
• To investigate the role of informative dropout in longitudinal cognitive studies.
• To demonstrate the utility of advanced biostatistical methods.

Main Methods:

• Utilized data from the Mayo Clinic Study of Aging, a longitudinal cohort.
• Employed linear mixed-effects models (LMMs) for cognitive trajectory analysis.
• Applied shared parameter models to account for informative dropout.

Main Results:

• Anesthesia exposure was significantly associated with cognitive decline (p < 0.001).
• Accounting for informative dropout revealed a stronger association with cognitive decline (p = 0.004).
• The study included 1948 participants with a median age of 79.

Conclusions:

• General anesthesia is associated with accelerated cognitive decline in older adults.
• Biostatistical methods addressing informative dropout are essential for accurate longitudinal analysis.
• This study underscores the impact of methodology on research conclusions in aging and cognition.