Korean J Fam Pract. 2018; 8(4): 626-628  https://doi.org/10.21215/kjfp.2018.8.4.626
Correlation between Renal Function and Depression Scale in Patients with Cognitive Impairment
Doo Wan Cho, Dong Su Kang, Eui Won Kim, Da Mi You, Hyo Rim Son*
Department of Family Medicine, Gwangju Veterans Hospital, Gwangju, Korea
Hyo Rim Son Tel: +82-62-602-6267, Fax: +82-62-602-6982 E-mail: winmanf@naver.com ORCID: http://orcid.org/0000-0003-2239-1914
Received: March 2, 2017; Revised: September 12, 2017; Accepted: September 18, 2017; Published online: August 20, 2018.
© The Korean Academy of Family Medicine. All rights reserved.

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Background: As the proportion of elderly people within the population has increased, so has the prevalence of dementia and cognitive dysfunction. Renal function is a characteristic that also deteriorates with age. The present study analyzed the relationship between renal function and depression, in patients with cognitive impairment .
Methods: We analyzed the results of the Seoul neuropsychological screening battery II from 96 patients (56 with mild cognitive impairment and 40 with dementia) who visited the Gwangju Veterans Hospital outpatient clinic from January 2016 to October 2016. We also examined renal function in these patients.
Results: We show that the depression scale score increases with the severity of cognitive impairment, and further that there is a close correlation between renal function (blood urea nitrogen, creatinine, glomerular filtration rate, creatinine clearance) and cognitive impairment.
Conclusion: As renal function decreases, there is a correlative decrease in cognitive function and an inverse increase on the depression scale, in patients with cognitive impairment.
Keywords: Cognitive Impairment; Dementia; Depression Scale; Renal Function
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