Evidence map›Paper›PMID 23449769›Full record

ArticleClinical journal of the American Society of Nephrology : CJASN2013

Low 25-hydroxyvitamin D levels and cognitive impairment in hemodialysis patients.

Kamran Shaffi, Hocine Tighiouart, Tammy Scott, Kristina Lou, David Drew, Daniel Weiner, Mark Sarnak

Abstract read
In one paragraph

Article in Clinical journal of the American Society of Nephrology : CJASN, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

22 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Cognitive Impairment in End Stage Renal Disease Patients Undergoing Hemodialysis: Markers and Risk Factors.International journal of environmental research and public health · 2022
    Pooled it
  2. Article
  3. Article
  4. Article
  5. Genetic and circulating biomarkers of cognitive dysfunction and dementia in CKD.Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association · 2025
    Review
  6. Review
  7. Article
  8. Article
  9. Article
  10. Observational
  11. Cognitive Function and Vitamin D Status in the Chinese Hemodialysis Patients.Computational and mathematical methods in medicine · 2022
    Article
  12. Article
  13. Article
  14. Review
  15. Vitamin D and Atherosclerotic Cardiovascular Disease.The Journal of clinical endocrinology and metabolism · 2019
    Article
  16. Article
  17. Review
  18. Review
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors.

Kamran ShaffiDivision of Nephrology, Department of Medicine, Tufts Medical Center, Boston, Massachusetts 02111, USA.
Hocine Tighiouart
Tammy Scott
Kristina Lou
David Drew
Daniel Weiner
Mark Sarnak

Funding

Kidney Disease, Stroke and Cognitive ImpairmentK23DK071636 · NIDDK · TUFTS MEDICAL CENTER · PI WEINER, DANIEL E · 2005 to 2009
$644k
Chronic Kidney Disease, Vascular Disease and AgingK24DK078204 · NIDDK · TUFTS MEDICAL CENTER · PI SARNAK, MARK J · 2007 to 2011
$587k
Cardiac Risk Factors in Chronic Kidney DiseaseR21DK068310 · NIDDK · TUFTS MEDICAL CENTER · PI SARNAK, MARK J · 2005 to 2006
$443k
NIDDK NIH HHS K23 DK071636NIDDK NIH HHS K23 DK71636NIDDK NIH HHS K24 DK078204NIDDK NIH HHS R01 DK078204NIDDK NIH HHS R21 DK068310NIDDK NIH HHS R21DK068310
6 · The paper itself

Abstract

BACKGROUND AND

objectives25-hydroxyvitamin D (25[OH]D) deficiency and cognitive impairment are both prevalent in hemodialysis patients in the United States. This study tested the hypothesis that 25(OH)D deficiency may be associated with cognitive impairment because of its vasculoprotective, neuroprotective, and immune-modulatory properties. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: This cross-sectional analysis involved 255 patients enrolled in the Dialysis and Cognition Study between 2004 and 2012. In linear regression models, 25(OH)D was the exposure variable; it was used first as a continuous variable and then stratified as deficient (<12 ng/ml), insufficient (12 to <20 ng/ml), and sufficient (≥20 ng/ml). Principal component analysis was used to obtain the memory and the executive function domains from the individual neurocognitive tests. Scores on individual tests as well as on the memory and executive function domains were the outcome variables. Multivariable models were adjusted for age, sex, race, education, and other potential confounding variables.

resultsMean serum 25(OH)D ± SD was 17.2±7.4 ng/ml, with 14%, 55%, and 31% of patients in the deficient, insufficient, and sufficient groups, respectively. Patients in the deficient group were more likely to be women, African American, and diabetic and to have longer dialysis vintage. Higher 25(OH)D levels were independently associated with better performance on several tests of executive function (mean difference on component executive score, 0.16 [95% confidence interval, 0.04-0.28; P=0.01] for each SD higher 25[OH]D). No association was seen with tests assessing memory.

conclusions25(OH)D deficiency in hemodialysis patients is associated with worse cognitive function, particularly in domains that assess executive function.

Indexed as

CognitionAgedAged, 80 and overBiomarkersBostonCognition DisordersCross-Sectional StudiesExecutive FunctionFemaleHumansLinear ModelsMaleMemoryMiddle AgedMultivariate AnalysisNeuropsychological Tests25-hydroxyvitamin DBiomarkersVitamin D

Identifiers

PMID23449769
PMCPMC3675858

What OpenQuestion holds

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Registered trials

None linked

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.