This study examined the relationship between older adults’ subjective versus objective sleep and subjective cognitive decline (SCD), and explored the role of depression on this association. One hundred and four community-dwelling older adults underwent a week of actigraphic sleep monitoring, and completed a series of neuropsychological screeners. Older adults’SCD score was positively correlated with subjective insomnia, but not with objective sleep parameters. Further mediation modeling revealed that older adults’depression mediated the association between subjective insomnia and SCD. Subjective sleep, rather than objective sleep, may be a more sensitive indicator for older adults’ SCD, with depression symptoms appearing to account for most of the variance. These findings extend our perspective on the relationship between sleep disruption and cognitive decline, and highlight the necessity of early targeted interventions on sleep to reduce the risk of cognitive impairment in the elderly with SCD.

本研究检验了老年人的主观与客观睡眠与主观认知能力下降 (SCD) 之间的关系，并探讨了抑郁症在这种关联中的作用。一百零四名居住在社区的老年人接受了一周的活动图睡眠监测，并完成了一系列神经心理筛查。老年人的SCD评分与主观失眠呈正相关，但与客观睡眠参数无关。进一步的中介模型显示，老年人的抑郁在主观失眠与SCD之间的关联中起中介作用。主观睡眠，而不是客观睡眠，可能是老年人 SCD 更敏感的指标，抑郁症状似乎解释了大部分差异。