Better self-reported sleep quality was independently associated with a lower risk of depressive symptoms in older adults, with good sleep quality associated with a 69% lower risk compared to poor sleep quality.
Key Findings
Results
Intermediate sleep quality was associated with a 45% lower risk of depressive symptoms compared to poor sleep quality.
HR = 0.55, 95% CI: 0.43-0.69
Analysis used Cox proportional hazards models adjusting for demographic, health, and lifestyle factors
Sleep quality was self-reported and categorized as good, intermediate, or poor
Sample consisted of 8425 eligible participants from wave 4 (2008-2009) of the English Longitudinal Study of Ageing
Results
Good sleep quality was associated with a 69% lower risk of depressive symptoms compared to poor sleep quality.
HR = 0.31, 95% CI: 0.24-0.40
Depressive symptoms were assessed using the CESD8 scale
This association remained significant in sensitivity analyses limited to individuals with normal sleep duration
The analysis started from wave 4 (2008-2009) of ELSA with 11,050 non-depressed participants initially enrolled
Results
Stronger protective effects of sleep quality on depressive symptoms were observed in adults aged 60-80 years.
Age subgroup analysis showed differential effects across age groups
The protective association was specifically stronger in the 60-80 year age range compared to other age groups
Overall sample included older adults followed prospectively from wave 4 of ELSA
Results
Participants who maintained or improved their sleep quality over time had significantly lower risk of depressive symptoms than those whose sleep worsened.
Participants who maintained sleep quality had HR = 0.64 compared to those whose sleep worsened
Participants who improved their sleep quality had HR = 0.58 compared to those whose sleep worsened
This finding highlights the importance of longitudinal changes in sleep quality, not just baseline sleep quality
Both associations were statistically significant
Methods
The study followed 8425 eligible non-depressed older adults prospectively using data from the English Longitudinal Study of Ageing.
11,050 non-depressed participants from wave 4 (2008-2009) were initially identified, with 8425 deemed eligible after exclusions
Sleep quality was self-reported and categorized into three groups: good, intermediate, or poor
Depressive symptoms were assessed using the CESD8 scale
Cox proportional hazards models were used to estimate hazard ratios, adjusting for demographic, health, and lifestyle factors
Guo M, Guo M, Dong H, Wan H, Cai M, Zhao Z, et al.. (2026). Higher sleep quality predicts lower risk of depressive symptoms: A prospective analysis from the English longitudinal study of ageing.. Journal of affective disorders. https://doi.org/10.1016/j.jad.2026.121420