Evidence map›Paper›PMID 33217151›Full record

ArticleThe clinical respiratory journal2021

Vitamin D deficiency is associated with chronic obstructive pulmonary disease and exacerbation of COPD.

Komarla Sundararaja Lokesh, Sindaghatta Krishnarao Chaya, Biligere Siddaiah Jayaraj, Attahalli Shivanarayanprasad Praveena, Murali Krishna, Purnima Madhivanan, Padukudru Anand Mahesh

Open access · greenAbstract read
In one paragraph

Article in The clinical respiratory journal, 2021. 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
3.2field-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

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 42 citations in OpenAlex.

  1. Pooled it
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  5. Evaluation of micronutrients in stable COPD patients.Asia Pacific journal of clinical nutrition · 2025
    Article
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  7. Medical nutrition therapy in chronic obstructive pulmonary disease: A narrative review.Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition · 2025
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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 4 institutions in 3 countries.

Komarla Sundararaja LokeshDepartment of Respiratory Medicine, JSS Medical College and Hospital, JSS Academy of Higher Education & Research (JSSAHER), Mysuru, India.ORCID https://orcid.org/0000-0001-5651-1123
Sindaghatta Krishnarao ChayaDepartment of Respiratory Medicine, JSS Medical College and Hospital, JSS Academy of Higher Education & Research (JSSAHER), Mysuru, India.ORCID https://orcid.org/0000-0002-4898-9466
Biligere Siddaiah JayarajDepartment of Respiratory Medicine, JSS Medical College and Hospital, JSS Academy of Higher Education & Research (JSSAHER), Mysuru, India.ORCID https://orcid.org/0000-0001-6055-4580
Attahalli Shivanarayanprasad PraveenaDepartment of Studies in Statistics, University of Mysore, Mysuru, India.ORCID https://orcid.org/0000-0001-6659-1833
Murali KrishnaFoundation for Research and Advocacy in Mental Health, Mysuru, India.ORCID https://orcid.org/0000-0002-5354-9027
Purnima MadhivananDepartment of Health Promotion Sciences, Mel & Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ, USA.ORCID https://orcid.org/0000-0001-7818-3394
Padukudru Anand MaheshDepartment of Respiratory Medicine, JSS Medical College and Hospital, JSS Academy of Higher Education & Research (JSSAHER), Mysuru, India.ORCID https://orcid.org/0000-0003-1632-5945
JSS Academy of Higher Education and Research · INEdge Hill University · GBUniversity of Arizona · USUniversity of Mysore · IN

Funding

Research Mentoring and Building Capacity of underrepresented Minority Research Scientists in India.D43TW010540 · FIC · YALE UNIVERSITY · PI MICHELE BARRY, Eva Harris · 2017 to 2026
$15.5M
Global Health Fellows and Scholars Research TrainingR25TW009338 · FIC · UNIVERSITY OF CALIFORNIA BERKELEY · PI BARRY, MICHELE, KO, ALBERT ICKSANG · 2012 to 2016
$5.2M
FIC NIH HHS D43 TW010540FIC NIH HHS R25 TW009338National Institutes of Health (NIH) Fogarty International Center (FIC) Grant R25 TW009338 through Global Health Equity Scholars (GHES) Fellowship Program
6 · The paper itself

Abstract

introductionLow Vitamin D levels have been associated with Chronic Obstructive Pulmonary Disease (COPD) and acute exacerbations.

objectivesThere is a paucity of data on Vitamin D and COPD, its severity and exacerbations in populations that are exposed to sunlight regularly with high levels of physical activity most of their lives.

methodsSerum levels of 25-OH-Vitamin-D were assessed in 100 COPD subjects and 100 age- and gender-matched controls from the rural community-based MUDHRA cohort in South India. Levels of <20 ng/mL were defined as Vitamin D deficiency. Smoking habits, occupation, Charlson co-morbidity index, Standard of living index(SLI), body mass index(BMI), 6-minute walking distance were examined for associations with logistic regression between controls and COPD subjects. Unconditional logistic regression was used to examine the association with exacerbation of COPD.

resultsVitamin D deficiency was observed in 64.5% (95%CI 57.7-70.8) of the subjects in spite of regular exposure to sunlight. Subjects with COPD had higher risk of Vitamin D deficiency (Adjusted OR: 5.05; 95%CI 1.4-17.8) as compared to controls. Amongst subjects with COPD, Vitamin D deficient subjects were three times more likely to have exacerbations in the previous year (Adjusted OR:3.51; 95%CI 1.27-9.67) as compared to COPD subjects without Vitamin D deficiency. Levels of Vitamin D <20.81 ng/mL and <18.45 ng/mL had the highest levels of combined sensitivity and specificity for COPD and acute exacerbation of COPD (AECOPD) respectively.

conclusionIn a rural population exposed to sunlight many hours a day throughout their lives, low Vitamin D levels were associated with COPD and exacerbations of COPD.

Indexed as

Pulmonary Disease, Chronic ObstructiveVitamin D DeficiencyBiomarkersCohort StudiesDisease ProgressionHumansVitamin DBiomarkersVitamin D6-minute walk distanceacute exacerbation of COPDCOPDspirometryVitamin D

Identifiers

PMID33217151
PMCPMC8043964
OpenAlexW3100284180

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.