Centre for the Study of Regional Development, School of Social Sciences, Jawaharlal Nehru University, New Delhi, India.
BMC Public Health. 2022 Oct 18;22(1):1933. doi: 10.1186/s12889-022-14329-9.
Life satisfaction (LS), a useful construct in the study of psycho-social well-being, is an important indicator of healthy aging. With a view to investigate whether the improved longevity in India is accompanied by commensurate levels of well-being and contentment among the older adults , this study aimed to examine (1) the association between LS and sleep quality among older Indian adults aged 60 years and above (2) the mediating role of depression that accounts for the association and (3) the moderating role of functional limitation in this mediation.
Cross-sectional data from the Longitudinal Ageing Study in India (LASI), Wave-1 (2017-18) was used. Pearson's correlation coefficients were calculated to investigate the pair-wise relationship between sleep quality, depressive symptoms, functional limitation, and LS. Structural Equation Model was employed to analyse the moderated-mediated association between sleep quality and the level of LS.
Sleep quality had a direct effect (β=-0.12) as well as an indirect effect (β=-0.024) via depressive symptoms on LS, accounting for 83.6 and 16.4 per cent of the total effects, respectively. Also, the interaction term between poor seep quality and functional limitation was positive (β = 0.03, p < 0.001) in determining depressive symptoms, suggesting that higher level of functional limitation aggravated the indirect effect of poor sleep quality on LS.
The findings of the study suggested that ensuring both the physical as well as the mental well-being of the population during the life course may confer in later life the desired level of life satisfaction.
生活满意度（LS）是研究心理社会幸福感的有用指标，是健康老龄化的重要指标。为了研究印度的预期寿命延长是否伴随着老年人幸福感和满足感的相应提高，本研究旨在：（1） 探讨印度 60 岁及以上老年人的 LS 与睡眠质量之间的关系；（2） 抑郁在其中的中介作用；（3） 功能障碍在其中的调节作用。
本研究使用了印度纵向老龄化研究（LASI）的横断面数据（2017-18 年）。采用皮尔逊相关系数来探讨睡眠质量、抑郁症状、功能障碍与 LS 之间的两两关系。采用结构方程模型来分析睡眠质量与 LS 水平之间的调节中介关系。
睡眠质量对 LS 既有直接影响（β=-0.12），也有通过抑郁症状的间接影响（β=-0.024），分别占总效应的 83.6%和 16.4%。此外，睡眠质量差和功能障碍之间的交互项对抑郁症状有正向影响（β=0.03，p<0.001），表明较高的功能障碍程度加剧了睡眠质量差对 LS 的间接影响。
研究结果表明，在整个生命过程中确保人口的身心健康可能会在以后的生活中带来所需的生活满意度。
