Evidence map›Paper›PMID 27621852›Full record

ArticleJournal of thoracic disease2016

Oxygen desaturation during a 6-minute walk test as a predictor of maximal exercise-induced gas exchange abnormalities in sarcoidosis.

Cecile Chenivesse, Sarah Boulanger, Carole Langlois, Lidwine Wemeau-Stervinou, Thierry Perez, Benoit Wallaert

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

Article in Journal of thoracic disease, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
0.4field-weighted citation impact, top 33% 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

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 11 citations in OpenAlex.

  1. Pooled it
  2. Effect of vitamin DJournal of the International Society of Sports Nutrition · 2023
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  4. 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

6 authors at 3 institutions in 2 countries.

Cecile ChenivesseDepartment of Respiratory Medicine, Rare Disease Center, Univ. Lille, F-59000 Lille, France.
Sarah BoulangerDepartment of Respiratory Medicine, Rare Disease Center, Univ. Lille, F-59000 Lille, France.
Carole LangloisDepartment of Biostatistics, Univ. Lille, F-59000 Lille, France.
Lidwine Wemeau-StervinouDepartment of Respiratory Medicine, Rare Disease Center, Univ. Lille, F-59000 Lille, France.
Thierry PerezDepartment of Respiratory Medicine, Rare Disease Center, Univ. Lille, F-59000 Lille, France; Lung Function Department, Univ. Lille, F-59000 Lille, France.
Benoit WallaertDepartment of Respiratory Medicine, Rare Disease Center, Univ. Lille, F-59000 Lille, France.
Rare Disease Therapeutics (United States) · USCancer Research And Biostatistics · USUniversité de Lille · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCommon tests for evaluating gas exchange impairment have different strengths and weaknesses. Alveolar-to-arterial oxygen pressure difference (AaDO2) at peak exercise is a sensitive indicator but it cannot be measured repeatedly. Diffusing capacity of the lung for carbon monoxide (DLco) is measured at rest and may be too insensitive to predict the effects of exercise on gas exchange impairment. Oxygen desaturation during a 6-minute walk test (∆SpO2-6MWT) can be measured repeatedly, but its value in sarcoidosis is unknown. Here, we evaluated the ability of ∆SpO2-6MWT and DLco to predict gas exchange impairment during exercise in sarcoidosis.

methodsThis retrospective study of 130 subjects with sarcoidosis investigated the relationship between DLco, ∆SpO2-6MWT, and peak AaDO2 using correlation tests, inter-test reliability analyses, and predictive values. For the analyses of inter-test reliability and predictive values, DLco, peak AaDO2, and ∆SpO2-6MWT were considered as binary variables (normal/abnormal) according to previously defined thresholds.

resultsCorrelation coefficients between DLco, ∆SpO2-6MWT, and peak AaDO2 were intermediate (0.53-0.67, P<0.0003) and Kappa coefficients were low (0.21-0.42, P=0.0003-0.02). DLco predicted (I) increased peak AaDO2 with a positive predictive value (PPV) of 66% and a negative predictive value (NPV) of 78% and (II) increased ∆SpO2-6MWT with a PPV at 36% and an NPV at 88%. Normal DLco was a good predictor of the absence of severe desaturation during the 6MWT (94% NPV) and at peak exercise during cardiopulmonary exercise test (CPET) (100% NPV). ∆SpO2-6MWT predicted peak AaDO2 increase with a PPV of 74% and an NPV of 60%.

conclusionsIn a large population of sarcoidosis patients, neither ∆SpO2-6MWT nor DLco was a good predictor of increased peak AaDO2. In contrast, normal DLco was a good predictor of the absence of severe desaturation during the 6MWT and at peak exercise during CPET.

Indexed as

6-minute walk test (6MWT)alveolar-arterial oxygen gradientcardiopulmonary exercise test (CPET)diffusing capacitypulmonary gas exchangeSarcoidosis

Identifiers

PMID27621852
PMCPMC4999731
OpenAlexW2462492703

What OpenQuestion holds

Textmetadata
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.