Evidence map›Paper›PMID 27156622›Full record

ArticleTuberculosis (Edinburgh, Scotland)2016

Elevated serum 25-hydroxy (OH) vitamin D levels are associated with risk of TB progression in Gambian adults.

Olumuyiwa Owolabi, Schadrac Agbla, Patrick Owiafe, Simon Donkor, Toyin Togun, Abdou K Sillah, Martin O C Ota, Jayne S Sutherland

Open access · hybridAbstract readComparative Study
In one paragraph

Article in Tuberculosis (Edinburgh, Scotland), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 2 pooled it
3.2field-weighted citation impact, top 9% 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

9 citing papers in PubMed, 2 syntheses or guidelines pooled it, 25 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Trial
  5. Article
  6. Article
  7. Article
  8. Observational
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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

8 authors at 2 institutions in 3 countries.

Olumuyiwa OwolabiVaccines & Immunity Theme, Medical Research Council Unit, Atlantic Road, Fajara, Gambia. Electronic address: oowolabi@mrc.gm.
Schadrac AgblaVaccines & Immunity Theme, Medical Research Council Unit, Atlantic Road, Fajara, Gambia.
Patrick OwiafeVaccines & Immunity Theme, Medical Research Council Unit, Atlantic Road, Fajara, Gambia; Department of Medical Laboratory Science, University of Health and Allied Sciences, PMB 31 Ho, Volta Region, Ghana.
Simon DonkorVaccines & Immunity Theme, Medical Research Council Unit, Atlantic Road, Fajara, Gambia.
Toyin TogunVaccines & Immunity Theme, Medical Research Council Unit, Atlantic Road, Fajara, Gambia.
Abdou K SillahVaccines & Immunity Theme, Medical Research Council Unit, Atlantic Road, Fajara, Gambia.
Martin O C OtaVaccines & Immunity Theme, Medical Research Council Unit, Atlantic Road, Fajara, Gambia; World Health Organisation Regional Office, Brazzaville, Congo.
Jayne S SutherlandVaccines & Immunity Theme, Medical Research Council Unit, Atlantic Road, Fajara, Gambia.
MRC Unit the Gambia · GMUniversity of Health and Allied Sciences · GH

Funding

Medical Research Council MC_U190071468Medical Research Council MC_UP_A900_1122World Health Organization 001
6 · The paper itself

Abstract

backgroundVitamin D is essential in the host defence against tuberculosis (TB) as an immune modulator. The aim of this study was to determine the level of 25-hydroxyvitamin D (25 (OH) D) from adult TB index cases before and after treatment and their exposed household contacts (HHC) in The Gambia.

methodsSerum from adult index TB cases and their TB-exposed household contacts (HHC) was analysed for 25(OH) D and Vitamin D binding protein (VDBP) concentrations. Tuberculin skin test (TST) status was used as a measure of Mycobacterium tuberculosis (Mtb) infectivity in the HHC. In addition, HHC who later progressed to active TB (incident cases) were assessed alongside non-progressors to determine the influence of 25 (OH) D levels on TB risk.

resultsEighty-three TB cases, 46 TST+ and 52 TST- HHC were analysed. Generally levels of 25(OH) D were considered insufficient in all subjects. However, median levels of 25(OH) D and VDBP were significantly higher in TB cases compared to both TST+ and TST- HHC at recruitment and were significantly reduced after TB therapy (p < 0.0001 for all). In addition, levels of serum 25(OH) D at recruitment were significantly higher in TB progressors compared to non-progressors (median (IQR): 25.0(20.8-29.2) in progressors and 20.3 (16.3-24.6) ng/ml in non-progressors; p = 0.007).

conclusionIn The Gambia, an equatorial country, 25(OH) D levels are higher in serum of TB progressors and those with active disease compared to latently infected and uninfected subjects. These results contrast to findings in non-equatorial countries.

Indexed as

AdultAge FactorsAntitubercular AgentsBiomarkersCase-Control StudiesContact TracingDisease ProgressionFemaleGambiaHumansIncidenceLatent TuberculosisMaleMiddle AgedRisk FactorsTime Factors25-hydroxyvitamin DAntitubercular AgentsBiomarkersVitamin DVitamin D-Binding Protein25(OH) DIncident casesLatent TB infectionTuberculosisVitamin D binding protein

Identifiers

PMID27156622
PMCPMC4869593
OpenAlexW2289824612

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.