Association Between Subjective Symptoms, Psychological Stress and Quality of Life Among Older Japanese Adults

Background/Objectives: A crucial issue in Japan, as a rapidly aging society, is supporting the quality of life (QOL) of older adults to ensure they do not require long-term care. This study aims to examine the association between subjective symptoms and psychological stress and QOL decline using a large-scale Japanese national statistics database. Methods: Anonymized data were analyzed from 23,649 adults aged ≥ 65 years, obtained from the Comprehensive Survey of Living Conditions carried out in 2019 in Japan. The degree of association of different factors with QOL decline was analyzed using univariate symptom analysis and adjusted odds ratios (ORs) obtained through binary logistic regression. We also compared the reported frequency and mean number of symptoms in a group with poor QOL and one with good/regular QOL. Results: In the group with poor QOL, significantly more individuals were aged ≥ 75 years, had high levels of psychological stress (Kessler Psychological Distress Scale [K6]), and reported subjective symptoms (p < 0.01). The mean number of symptoms was significantly higher in this group (5.77) than in the good/regular QOL group (3.34, p < 0.01). In the binary logistic regression, the variables with the highest adjusted ORs were the K6 group (4.49), impaired limb movement (2.81), and numbness of the limbs (2.01). Conclusions: These findings indicate that different symptoms, including stress, have varying impacts on QOL in older adults. Addressing symptoms associated with reduced QOL in community-dwelling older adults may help promote continued aging in place.