Evidence map›Paper›PMID 26130325›Full record

ArticleEuropean journal of nutrition2016

Serum 25-hydroxyvitamin D is associated with reduced verbal episodic memory in healthy, middle-aged and older adults.

Virginie Lam, Matthew A Albrecht, Ryusuke Takechi, Prachya Prasopsang, Ya Ping Lee, Jonathan K Foster, John C L Mamo

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Article in European journal of nutrition, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
2.0field-weighted citation impact, top 14% 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

10 citing papers in PubMed, 23 citations in OpenAlex.

  1. Is There a Role of Vitamin D in Alzheimer's Disease?CNS & neurological disorders drug targets · 2024
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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

7 authors at 1 institution in 2 countries.

Virginie LamSchool of Public Health, Curtin University, Perth, WA, Australia.
Matthew A AlbrechtSchool of Public Health, Curtin University, Perth, WA, Australia.
Ryusuke TakechiSchool of Public Health, Curtin University, Perth, WA, Australia.
Prachya PrasopsangSchool of Pharmacy, Perth, WA, Australia.
Ya Ping LeeSchool of Pharmacy, Perth, WA, Australia.
Jonathan K FosterSchool of Psychology and Speech Pathology, Curtin University, Perth, WA, Australia.
John C L MamoSchool of Public Health, Curtin University, Perth, WA, Australia. J.Mamo@Curtin.edu.au.
Curtin University · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThere is increasing evidence supporting an association of higher serum vitamin D concentration with better cognitive performance in older individuals. However, to date, consideration of the putative association between vitamin D and cognition has been based principally on studies investigating clinical participant samples manifesting vitamin D deficiency, particularly in older people. Moreover, relationships between vitamin D and cognition are typically not considered in the context of counter-regulatory calcium-modulating hormones or calcium homeostasis.

objectiveSerum vitamin D/bioactive (ionised) calcium/parathyroid hormone homeostasis was considered in the context of cognitive performance in healthy, middle-aged and older individuals.

designA cross-sectional sample of 179 participants between the ages of 47-84 years was recruited for this study (114 females, 65 males). Participants provided fasting blood samples for analysis of serum 25-hydroxyvitamin D levels, ionised calcium (iCa) and parathyroid hormone (PTH) and completed cognitive measures of verbal episodic learning and memory.

resultsSerum 25-hydroxyvitamin D concentrations were negatively associated (with and without covariates of age, gender, depression and NART scores, iCa, and PTH) with measures of verbal episodic learning and memory, in particular with trial 5 of the Rey Auditory Verbal Learning Test (RAVLT) and long-delay free recall on the RAVLT.

conclusionOverall, the findings from this study suggest an association between higher vitamin D status and poorer performance on verbal episodic memory in middle-aged and older individuals with normal vitamin D-calcium-PTH homeostasis. Despite requiring replication in other participant samples, this is a potentially important finding as it indicates that it may not be beneficial from a cognitive perspective to provide vitamin D supplements in individuals with already adequate vitamin D status.

Indexed as

Memory, EpisodicAgedAged, 80 and overCalciumCognitionCross-Sectional StudiesFastingFemaleHumansLearningLinear ModelsMaleMiddle AgedParathyroid HormoneVitamin DVitamin D Deficiency25-hydroxyvitamin DCalciumParathyroid HormoneVitamin DCognitionIonised calciumParathyroid hormoneSerum 25-hydroxyvitamin DVerbal episodic memoryVitamin D

Identifiers

PMID26130325
OpenAlexW2242899253

What OpenQuestion holds

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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.