Key result
Poorer subjective sleep quality was associated with reduced total power of heart rate variability, reflecting decreased parasympathetic and increased sympathetic activity in older adults.
Why the study?
Poor sleep quality impairs homeostasis and autonomic functions are vital for health, but the impact of subjective sleep quality on autonomic functions across different adult age groups required analysis.
Does subjective sleep quality affect autonomic functions in different age groups of adults?
Cross-Sectional (n=375)
Randomly selected
No
Does subjective sleep quality affect autonomic functions in different age groups of adults?
Aging is associated with poorer sleep quality and reduced sleep efficiency, which correlates with autonomic dysfunction characterized by increased sympathetic and decreased parasympathetic activity.
Answers are grounded in this paper and cite their sources.
Association in older adults does not imply causality or support practice change; leaves open need for prospective studies.
Background: Poor sleep quality adversely affects the person’s homeostasis via combination of impairments to multiple physiological-mechanisms. Autonomic functions are important for different aspects of health and disease. Objective of study was to analyze the impact of subjective sleep quality on autonomic functions in different age groups of adults.Methods: A total of 375 apparently healthy adults from community were randomly selected for this cross-sectional observational study. They were divided into three groups based on the age distributions: Group 1: 18-30 years (n = 146); Group 2: 31-45 years (n = 112); and Group 3: 46-60 years (n = 117). Following assessments were done in all the participants in three groups: Anthropometric measurements, Pittsburgh Sleep-quality Index (PSQI), Electrocardiography (ECG), Autonomic functions based on frequency domain heart rate variability (HRV). Two-way analysis of variance followed by post hoc analysis was done for intergroup comparisons of all assessment characteristics. Spearman’s correlation was done to find the correlation coefficients between PSQI scoring and all other parameters mentioned above.Results: BMI, GPSQIS, SSQS, SDS and SMS were observed more in group2 and 3 as compared to group1, whereas SD and SE were more in group1 as compared to group 2 and 3. HF, Total Power and RR were more in group 1 as compared to group 3, whereas VLF and HR were less in group 1 as compared to group 3. LF/HF ratio and HR were more in group 3 as compared to group 2, whereas HF was more in group 2 as compared to group 3. There was statistically significant negative correlation between GPSQI and Total power, SMS and HF, SIT and HF, SD and LF/HF ratio, whereas statistically significant positive correlation between SMS and LF, SMS and LF/HF ratio, SIT and LF, SIT and LF/HF ratio, SD and total power as well as SE and total power.Conclusions: Ageing in adults affects the sleep-quality, reduces the sleep duration and decreases the sleep efficiency; these contribute to autonomic dysfunction as increased sympathetic activity and decreased parasympathetic activity in older adults as compared to younger adults.
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Jasrotia et al. (2019) conducted a cross-sectional in Healthy adults (n=375). Subjective sleep quality vs. Good sleep quality was evaluated on Correlation between Global PSQI score and Total Power of heart rate variability (rs = -0.259, p=0.021). Poorer subjective sleep quality was associated with reduced total power of heart rate variability, reflecting decreased parasympathetic and increased sympathetic activity in older adults.
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