Key result
Subjective sleep quality and resting heart rate variability were not significantly related in older adults with mild cognitive impairment, although good sleepers showed a higher resting heart rate (p=0.037).
Why the study?
Sleep problems are linked to cardiovascular and neurodegenerative diseases, but the relationship between subjective sleep quality and cardiac autonomic control in individuals with mild cognitive impairment required investigation.
Does subjective sleep quality correlate with resting state heart rate variability in older adults with mild cognitive impairment?
Population
42 MCI participants (aged 56–80 years)
Comparison
Subjective sleep quality via PSQI vs resting state HRV
Design
Cross-sectional study
Authors
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Association between poorer sleep quality and cardiac autonomic measures in MCI is hypothesis-generating; leaves open causality and clinical implications.
Cross-Sectional (n=42)
Does subjective sleep quality correlate with resting state heart rate variability in older adults with mild cognitive impairment?
Effect estimate: ES 0.670
p-value: p=0.037
Subjective sleep quality and resting heart rate variability do not appear to be significantly related in older adults with mild cognitive impairment, contrasting with expected associations seen in healthy individuals.
Grässler et al. (2021) conducted a cross-sectional in Mild cognitive impairment (MCI) (n=42). Subjective sleep quality vs. Poor sleep quality was evaluated on Resting state heart rate variability (HRV) and resting heart rate (ES 0.670, p=0.037). Subjective sleep quality and resting heart rate variability were not significantly related in older adults with mild cognitive impairment, although good sleepers showed a higher resting heart rate (p=0.037).
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