Association between cognitive dysfunction and diabetes in patients over 65 years old: a cross-sectional study using propensity score matching.
Liwen Zhai, Yao Yang, Jun Zhang and 5 others
PMID 38380813WHAT IT FOUND
Older adults with diabetes were significantly more likely to have cognitive dysfunction than matched controls.
Among those with diabetes, having cognitive dysfunction was strongly associated with greater dependence in daily activities like bathing and dressing.
Key findings
01After matching for age, sex, education and other factors, patients with diabetes were more likely to have cognitive dysfunction than those without (p = 0.017).
02In the subgroup of patients with diabetes, those with cognitive dysfunction had significantly higher dependence in activities of daily living compared to those without cognitive dysfunction (p < 0.001).
03Cognitive dysfunction was also independently associated with older age, lower psychological well-being, fewer years of education, and hearing loss, regardless of diabetes status.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
The study is cross-sectional, so it cannot determine whether diabetes causes cognitive dysfunction, or if the relationship is bidirectional or driven by other factors. Information on diabetes duration and specific treatments was not included, which could bias the results. The sample was drawn from a specific Chinese population, and the findings may not generalize to other ethnic or cultural groups. Cognitive dysfunction was defined by a single cutoff score on the MMSE, which may not capture subtle or domain-specific cognitive impairments.
Declared interests
The authors declared no conflicts of interest. The study used data from the CLHLS, funded by the National Institute on Aging, the National Natural Science Foundation of China, the Social Science Foundation of China, and the United Nations Population Fund. The funders had no role in the study design, analysis, or writing.
The easy way to misread this
Do not assume that diabetes directly causes the observed cognitive decline or functional dependence. The cross-sectional design only shows an association, and other unmeasured factors like disease duration or treatment history could explain the link.