Sleep quality partially mediates the relationship between physical frailty and cognitive impairment among community-dwelling older adults, accounting for 12.37% of the total effect.
The prevalence of cognitive impairment among community-dwelling older adults aged 60 and above in Xi'an, China was 21.77%.
Sleep quality partially mediated the relationship between physical frailty and cognitive impairment, accounting for 12.37% of the total effect.
Cognitive function was negatively correlated with both physical frailty and sleep quality, while physical frailty was positively correlated with sleep quality.
Age 85 years and older, middle school education, sleep duration greater than 8 hours, and stroke were independently associated with higher odds of cognitive impairment.
Physical frailty, sleep quality, and cognitive impairment were each measured using standardized, validated instruments in a large community-based sample.
This research suggests that among older adults living in the community, physical frailty and poor sleep quality are both linked to a higher likelihood of cognitive impairment (problems with thinking and memory). In a study of nearly 2,830 people aged 60 and older in Xi'an, China, about 1 in 5 participants showed signs of cognitive impairment. The researchers found that frail older adults tended to sleep worse, and those who slept worse tended to have poorer cognitive function. Being 85 or older, having only a middle school education, sleeping more than 8 hours per night, and having had a stroke were all independently associated with a greater chance of having cognitive impairment. Importantly, the study found that sleep quality acts as a 'middleman' in the pathway between frailty and cognitive decline — meaning that part of the reason frailty is linked to worse cognition may be because frailty leads to poorer sleep, which in turn harms cognitive function. This mediating effect of sleep quality accounted for about 12.37% of the total relationship between frailty and cognitive impairment. However, frailty also had a direct effect on cognition that was not explained by sleep, indicating the relationship is complex and involves multiple pathways. This research suggests that addressing sleep problems in frail older adults could be one avenue for potentially slowing cognitive decline. Healthcare providers, especially nurses working in community settings, may benefit from routinely screening older adults — particularly those who are frail — for sleep problems and offering sleep hygiene education and support. Because this was a cross-sectional study (a snapshot in time), it cannot prove that poor sleep or frailty directly causes cognitive impairment, but the findings highlight sleep quality as an important factor worth monitoring and addressing in geriatric care.
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Upload Your LabsChen L, Liu X, Yao L, Meng Y, Wang D, Meng Y, et al.. (2026). The Mediating Effect of Sleep Quality on the Relationship Between Frailty and Cognitive Impairment Among Community-Dwelling Older Adults: A Cross-Sectional Study.. Nursing open. https://doi.org/10.1002/nop2.70899