Evidence map›Paper›PMID 34030649›Full record

ArticleBMC geriatrics2021

Serum sodium in relation to various domains of cognitive function in the elderly US population.

Sohyae Lee, Jin-Young Min, Beom Kim, Sang-Won Ha, Jeohng Ho Han, Kyoung-Bok Min

Open access · goldAbstract read
In one paragraph

Article in BMC geriatrics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
3.2field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 36 citations in OpenAlex.

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  10. Chemotherapy-related cognitive impairment and kidney dysfunction.Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 1 country.

Sohyae LeeDepartment of Preventive Medicine, College of Medicine, Seoul National University, Seoul, Republic of Korea.
Jin-Young MinVeterans Medical Research Institute, Veterans Health Service Medical Center, Seoul, Republic of Korea.
Beom KimDivision of Nephrology, Department of Internal Medicine, Veterans Health Service Medical Center, Seoul, Republic of Korea.
Sang-Won HaDepartment of Neurology, Veteran Healthcare Service Medical Center, Seoul, Republic of Korea.
Jeohng Ho HanDepartment of Neurology, Veteran Healthcare Service Medical Center, Seoul, Republic of Korea.
Kyoung-Bok MinDepartment of Preventive Medicine, College of Medicine, Seoul National University, Seoul, Republic of Korea. minkb@snu.ac.kr.
Veterans Health Service Medical Center · KRSeoul National University · KRSeoul National University Hospital · KR

Funding

National Research Foundation of Korea 2019R1A2C1004966
6 · The paper itself

Abstract

backgroundRecent evidence suggests that sodium imbalances may be associated with cognitive impairment; however, the association between specific domains of cognition remains unclear. This study examines the association between serum sodium levels and immediate and delayed verbal memory as measured by the CERAD Word Learning Test (CERAD WLT), executive function as measured by the Animal Fluency test (AFT), and sustained attention, working memory, and processing speed as measured by the Digit Symbol Substitution test (DSST) in the elderly population of the US aged 60 and older who participated in the 2011-2014 National Health and Nutrition Examination Surveys (n = 2,541).

methodsCognitive function tests were performed by trained interviewers and sodium levels were measured using indirect ion selective electrode methodology.

resultsAfter adjusting for all covariates, quintiles of CERAD WLT scores showed significant positive associations with log-transformed sodium levels (Immediate recall (IR) β = 4.25 (SE = 1.83, p-value 0.027); Delayed recall (DR) β = 6.54 (SE = 1.82, p-value 0.001)). Compared to normal sodium levels, hyponatremia was significantly associated with lower CERAD WLT-IR (β = -0.34, SE = 0.15, p-value 0.035) and CERAD WLT-DR scores (β -0.48, SE = 0.10, p-value < 0.001) and showed borderline significance with AFT scores (β = = -0.38, SE = 0.19, p-value 0.052). Hypernatremia did not show any significant relationships with cognitive test scores, compared to normal sodium levels.

conclusionsOur cross-sectional study showed that lower sodium levels were associated with cognitive change, especially regarding memory and executive function.

Indexed as

CognitionCognitive DysfunctionAgedAnimalsCross-Sectional StudiesHumansMiddle AgedNeuropsychological TestsNutrition SurveysSodiumSodiumCognitive functionElderlyHyponatremiaSerum sodium

Identifiers

PMID34030649
PMCPMC8142486
OpenAlexW3164455019

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.