Napping, Sleep Apnea, and Cognitive Function: Cross-sectional Results from the U.S. POINTER-zzz Sleep Ancillary Study

Area of Science:

• Gerontology
• Sleep Medicine
• Cognitive Neuroscience

Background:

• The link between nap duration and cognitive function remains unclear.
• Investigating napping patterns in older adults is crucial for understanding cognitive health maintenance.

Purpose of the Study:

• To examine the association between napping duration and cognitive function in older adults.
• To determine if sleep apnea influences the relationship between napping and cognition.

Main Methods:

• Utilized sleep data from 686 older adults via home apnea-screening devices, actigraphy, and sleep diaries.
• Defined naps as sleep periods of at least 30 continuous minutes outside primary sleep.
• Employed linear regression to assess associations between nap duration and cognitive domains (global cognition, executive function, memory, processing speed), and sleep apnea interaction.

Main Results:

• Increased napping duration correlated with reduced processing speed in the overall sample.
• No significant interaction was found between sleep apnea and napping duration on overall cognition.
• Napping was linked to poorer executive function in participants with sleep apnea from under-represented ethno-racial groups.

Conclusions:

• Findings suggest napping duration may impact specific cognitive functions, particularly processing speed.
• Sleep apnea may exacerbate negative effects of napping on executive function in certain subgroups.
• Early detection and treatment of sleep apnea could offer cognitive benefits for older adults, especially those in vulnerable populations.