Evidence map›Paper›PMID 31360062›Full record

Trial reportInternational journal of chronic obstructive pulmonary disease2019

Impact of vitamin D on spirometry findings and quality of life in patients with chronic obstructive pulmonary disease: a randomized, double-blinded, placebo-controlled clinical trial.

Ali Alavi Foumani, Mojtaba Mehrdad, Alireza Jafarinezhad, Khadijeh Nokani, Alireza Jafari

Open access · goldAbstract readRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in International journal of chronic obstructive pulmonary disease, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 8 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 8 pooled it
3.5field-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

20 citing papers in PubMed, 8 syntheses or guidelines pooled it, 37 citations in OpenAlex.

  1. Pooled it
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  3. Vitamin D for the management of chronic obstructive pulmonary disease.The Cochrane database of systematic reviews · 2024
    Pooled it
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  9. Vitamin D in pulmonary disease.Breathe (Sheffield, England) · 2026
    Review
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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

5 authors at 1 institution in 1 country.

Ali Alavi FoumaniInflammatory Lung Diseases Research Center, Department of Internal Medicine, Razi Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
Mojtaba MehrdadInflammatory Lung Diseases Research Center, Department of Internal Medicine, Razi Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
Alireza JafarinezhadInflammatory Lung Diseases Research Center, Department of Internal Medicine, Razi Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
Khadijeh NokaniStudent Research Committee, Department of Internal Medicine, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
Alireza JafariInflammatory Lung Diseases Research Center, Department of Internal Medicine, Razi Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
Guilan University of Medical Sciences · IR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

COPD is an irreversible chronic illness with airflow limitation. The aim of the current study was to assess the role of vitamin D

Indexed as

Dietary SupplementsQuality of LifeAgedCholecalciferolDisease ProgressionDouble-Blind MethodFemaleForced Expiratory VolumeHumansIranLungMaleMiddle AgedPulmonary Disease, Chronic ObstructiveTime FactorsTreatment OutcomeCholecalciferol25-hydroxyvitamin D3airflow obstructionchroniclife quality

Identifiers

PMID31360062
PMCPMC6625601
OpenAlexW2955326264

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.