Evidence map›Paper›PMID 26621517›Full record

ArticleBMJ open2015

Home oxygen therapy reduces risk of hospitalisation in patients with chronic obstructive pulmonary disease: a population-based retrospective cohort study, 2005-2012.

Kyoung Hee Cho, Young Sam Kim, Chung Mo Nam, Tae Hyun Kim, Sun Jung Kim, Kyu-Tae Han, Eun-Cheol Park

Open access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in BMJ open, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.7field-weighted citation impact, top 25% 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

5 citing papers in PubMed, 11 citations in OpenAlex.

  1. A Proposed Checklist for Optimizing COPD Patient Discharge Processes in Italian Internal Medicine Wards.International journal of chronic obstructive pulmonary disease · 2026
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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 1 country.

Kyoung Hee ChoDepartment of Public Health, Graduate School, Yonsei University, Seoul, Korea Institute of Health Services Research, College of Medicine, Yonsei University, Seoul, Korea.
Young Sam KimDepartment of Internal Medicine, College of Medicine, Yonsei University, Seoul, Korea.
Chung Mo NamDepartment of Biostatistics, College of Medicine, Yonsei University, Seoul, Korea.
Tae Hyun KimInstitute of Health Services Research, College of Medicine, Yonsei University, Seoul, Korea Graduate School of Public Health, Yonsei University, Seoul, Korea.
Sun Jung KimDepartment of Public Health, Graduate School, Yonsei University, Seoul, Korea Institute of Health Services Research, College of Medicine, Yonsei University, Seoul, Korea.
Kyu-Tae HanDepartment of Public Health, Graduate School, Yonsei University, Seoul, Korea Institute of Health Services Research, College of Medicine, Yonsei University, Seoul, Korea.
Eun-Cheol ParkInstitute of Health Services Research, College of Medicine, Yonsei University, Seoul, Korea Department of Preventive Medicine, College of Medicine, Yonsei University, Seoul, Korea.
Yonsei University · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThis study evaluated the effect of home oxygen therapy (HOT) on hospital admissions in chronic obstructive pulmonary disease (COPD) patients. DESIGN AND

settingUsing nationwide health insurance claims from 2002-2012, we conducted a longitudinal population-based retrospective cohort study.

participantsIndividuals who were aged 40 years or above and newly diagnosed with COPD in 2005. OUTCOME MEASURES: The primary outcome was total number of hospitalisations during the study period. Participants were matched using HOT propensity scores and were stratified by respiratory impairment (grade 1: FEV1 ≤25% or PaO2 ≤55 mm Hg; grade 2: FEV1 ≤30% or PaO2 56-60 mm Hg; grade 3: FEV1 ≤40% or PaO2 61-65 mm Hg; 'no grade': FEV1 or PaO2 unknown), then a negative binomial regression analysis was performed for each group.

resultsOf the 36,761 COPD patients included in our study, 1330 (3.6%) received HOT. In a multivariate analysis of grade 1 patients performed before propensity score matching, the adjusted relative risk of hospitalisation for patients who did not receive HOT was 1.27 (95% CI 1.01 to 1.60). In a multivariate analysis of grade 1 patients performed after matching, the adjusted relative risk for patients who did not receive HOT was 1.65 (95% CI 1.25 to 2.18). In grade 2 or grade 3 patients, no statistical difference in hospital admission risk was detected. In the 'no grade' group of patients, HOT was associated with an increased risk of hospitalisation.

conclusionsHOT reduces the risk of hospital admission in COPD patients with severe hypoxaemia. However, apart from these patients, HOT use is not associated with hospital admissions.

Indexed as

Home Care ServicesOxygen Inhalation TherapyAgedCohort StudiesFemaleHospitalizationHumansMaleMiddle AgedPulmonary Disease, Chronic ObstructiveRetrospective StudiesRiskTime FactorsPRIMARY CARERESPIRATORY MEDICINE (see Thoracic Medicine)

Identifiers

PMID26621517
PMCPMC4679832
OpenAlexW2189537661

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.