Evidence map›Paper›PMID 27073876›Full record

Trial reportPloS one2016

Associations between Vitamin D Status and Type 2 Diabetes Measures among Inuit in Greenland May Be Affected by Other Factors.

Nina O Nielsen, Peter Bjerregaard, Pernille F Rønn, Henrik Friis, Stig Andersen, Mads Melbye, Marika Lundqvist, Arieh S Cohen, David M Hougaard, Marit E Jørgensen

Open access · goldAbstract readRandomized Controlled Trial
In one paragraph

Trial report in PloS one, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 4 pooled it
3.7field-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

16 citing papers in PubMed, 4 syntheses or guidelines pooled it, 24 citations in OpenAlex.

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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

10 authors at 5 institutions in 2 countries.

Nina O NielsenNational Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark.
Peter BjerregaardNational Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark.
Pernille F RønnSteno Diabetes Centre, Gentofte, Denmark.
Henrik FriisDepartment of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark.
Stig AndersenAalborg University Hospital, Aalborg, Denmark.
Mads MelbyeDepartment of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark.
Marika LundqvistDepartment of Congenital Disorders, Statens Serum Institut, Copenhagen, Denmark.
Arieh S CohenDepartment of Congenital Disorders, Statens Serum Institut, Copenhagen, Denmark.
David M HougaardDepartment of Congenital Disorders, Statens Serum Institut, Copenhagen, Denmark.
Marit E JørgensenSteno Diabetes Centre, Gentofte, Denmark.
Statens Serum Institut · DKSteno Diabetes Center · DKUniversity of Southern Denmark · DKAalborg University Hospital · DKUniversity of Copenhagen · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveEpidemiological studies have provided evidence of an association between vitamin D insufficiency and type 2 diabetes. Vitamin D levels have decreased among Inuit in Greenland, and type 2 diabetes is increasing. We hypothesized that the decline in vitamin D could have contributed to the increase in type 2 diabetes, and therefore investigated associations between serum 25(OH)D3 as a measure of vitamin D status and glucose homeostasis and glucose intolerance in an adult Inuit population.

methods2877 Inuit (≥18 years) randomly selected for participation in the Inuit Health in Transition study were included. Fasting- and 2hour plasma glucose and insulin, C-peptide and HbA1c were measured, and associations with serum 25(OH)D3 were analysed using linear and logistic regression. A subsample of 330 individuals who also donated a blood sample in 1987, were furthermore included.

resultsAfter adjustment, increasing serum 25(OH)D3 (per 10 nmol/L) was associated with higher fasting plasma glucose (0.02 mmol/L, p = 0.004), 2hour plasma glucose (0.05 nmol/L, p = 0.002) and HbA1c (0.39%, p<0.001), and with lower beta-cell function (-1.00 mmol/L, p<0.001). Serum 25(OH)D3 was positively associated with impaired fasting glycaemia (OR: 1.08, p = 0.001), but not with IGT or type 2 diabetes.

conclusionsOur results did not support an association between low vitamin D levels and risk of type 2 diabetes. Instead, we found weak positive associations between vitamin D levels and fasting- and 2hour plasma glucose levels, HbA1c and impaired fasting glycaemia, and a negative association with beta-cell function, underlining the need for determination of the causal relationship.

Indexed as

AdolescentAdultBlood GlucoseDiabetes Mellitus, Type 2FemaleGlucose IntoleranceGlucose Tolerance TestGreenlandHumansInuitMaleMiddle AgedPrediabetic StateRisk FactorsVitamin DVitamin D DeficiencyBlood GlucoseVitamin DVitamins

Identifiers

PMID27073876
PMCPMC4830590
OpenAlexW2336624331

What OpenQuestion holds

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LicenceCC BY
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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.