Evidence map›Paper›PMID 33678579›Full record

ArticleSleep medicine2022

Undiagnosed sleep disorder breathing as a risk factor for critical COVID-19 and pulmonary consequences at the midterm follow-up.

Gonzalo Labarca, Mario Henriquez-Beltran, Faryd Llerena, Gustavo Erices, Jaime Lastra, Daniel Enos, Daniela Castillo, Marco Fraga, Liliana Lamperti, Valeska Ormazabal and 15 more

Open access · greenAbstract read
In one paragraph

Article in Sleep medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
2.3field-weighted citation impact, top 10% 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 23 citations in OpenAlex.

  1. Global prevalence of post-COVID-19 condition: a systematic review and meta-analysis of prospective evidence.Health promotion and chronic disease prevention in Canada : research, policy and practice · 2025
    Pooled it
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  11. Sleep health and the circadian rest-activity pattern four months after COVID-19.Jornal brasileiro de pneumologia : publicacao oficial da Sociedade Brasileira de Pneumologia e Tisilogia · 2022
    Observational
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

25 authors at 7 institutions in 3 countries.

Gonzalo LabarcaFaculty of Medicine, Universidad de Concepción, Concepcion, Chile; Complejo Asistencial Dr. Victor Rios Ruiz, Los Angeles. Chile; Molecular and Translational Immunology Laboratory, Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, Universidad de Concepcion, Concepcion, Chile. Electronic address: glabarcat@gmail.com.
Mario Henriquez-BeltranKinesiology School, Escuela de Kinesiologia, Facultad de Salud, Universidad Santo Tomás. Los Angeles. Chile.
Faryd LlerenaMolecular and Translational Immunology Laboratory, Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, Universidad de Concepcion, Concepcion, Chile.
Gustavo EricesKinesiology School, Escuela de Kinesiologia, Facultad de Salud, Universidad Santo Tomás. Los Angeles. Chile.
Jaime LastraFaculty of Medicine, Universidad de Concepción, Concepcion, Chile; Internal Medicine, Hospital Regional Dr. Guillermo Grant Benavente, Concepcion, Chile.
Daniel EnosFaculty of Medicine, Universidad de Concepción, Concepcion, Chile; Complejo Asistencial Dr. Victor Rios Ruiz, Los Angeles. Chile.
Daniela CastilloMolecular and Translational Immunology Laboratory, Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, Universidad de Concepcion, Concepcion, Chile.
Marco FragaMolecular and Translational Immunology Laboratory, Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, Universidad de Concepcion, Concepcion, Chile.
Liliana LampertiMolecular and Translational Immunology Laboratory, Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, Universidad de Concepcion, Concepcion, Chile.
Valeska OrmazabalMolecular and Translational Immunology Laboratory, Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, Universidad de Concepcion, Concepcion, Chile.
Benilde RiffoPreveGen Clinical Laboratory, Concepción Chile.
Daniel RubilarKinesiology School, Escuela de Kinesiologia, Facultad de Salud, Universidad Santo Tomás. Los Angeles. Chile.
Rocio SanhuezaKinesiology School, Escuela de Kinesiologia, Facultad de Salud, Universidad Santo Tomás. Los Angeles. Chile.
Jaime VasquezFaculty of Medicine, Universidad de Concepción, Concepcion, Chile; Complejo Asistencial Dr. Victor Rios Ruiz, Los Angeles. Chile.
Carolina VillanuevaFaculty of Medicine, Universidad de Concepción, Concepcion, Chile.
Gloria HortaInternal Medicine, Hospital Regional Dr. Guillermo Grant Benavente, Concepcion, Chile.
Felipe SanhuezaComplejo Asistencial Dr. Victor Rios Ruiz, Los Angeles. Chile.
Pedro MeloComplejo Asistencial Dr. Victor Rios Ruiz, Los Angeles. Chile.
Jorge DreyseRespiratory and Sleep Medicine Unit, Clinica Las Condes, Santiago. Chile.
Jorge JorqueraRespiratory and Sleep Medicine Unit, Clinica Las Condes, Santiago. Chile.
Sebastian Fernandez-BussyRespiratory and Critical Care, Mayo Clinic Jacksonville, United States.
Jessica GonzalezPulmonary Department, Hospital Universitari Arnau de Vilanova and Santa Maria, Lleida, CIBERES, Madrid, Spain.
Ferran BarbePulmonary Department, Hospital Universitari Arnau de Vilanova and Santa Maria, Lleida, CIBERES, Madrid, Spain.
Estefania Nova-LampertiMolecular and Translational Immunology Laboratory, Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, Universidad de Concepcion, Concepcion, Chile.
CONTAC19 Consortium
University of Concepción · CLUniversidad Santo Tomás · CLClínica Las Condes · CLComplejo Asistencial Sótero del Río · CLHospital Universitari Arnau de Vilanova · ESHospital Regional de Concepción · CLJacksonville College · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionPatients with severe COVID-19 develops an acute respiratory distress syndrome (ARDS), requiring admission to the intensive care unit. COVID-19 also reports an increased prevalence of comorbidities, similar to patients with Sleep disorder breathing (SDB).

objectivesTo evaluate the association between undiagnosed SDB and the risk of ARDS and pulmonary abnormalities in a cohort of patients' survivors of COVID-19 between 3 and 6 months after diagnosis.

methodsProspective cohort study of patients who developed ARDS during hospitalization due to COVID-19 compared with a control group of patients who had COVID-19 with mild to moderate symptoms. All patients were evaluated between the 12th and 24th week after SARS-CoV-2 infection. The evaluation includes persistent symptoms, lung diffusing capacity of carbon monoxide (DLCO), chest CT scan and home sleep apnea test. SDB was diagnosed by the respiratory disturbance index ≥5 ev/h. The association between SDB and ARDS, the hazards of lung impairment and the hazard ratios (HR) were analyzed.

resultsA total of 60 patients were included (ARDS: 34 patients, Control: 26 patients). The mean follow-up was 16 weeks (range 12-24). ARDS reported a high prevalence of SDB (79% vs. 38% in control group). A total of 35% reported DLCO impairment, and 67.6% abnormal chest CT. SDB was independently associated to ARDS, OR 6.72 (CI, 1.56-28.93), p < 0.01, and abnormal Chest CT, HR 17.2 (CI, 1.68-177.4, p = 0.01). Besides, ARDS, days in mechanical ventilation, male gender were also associated with an increased risk of abnormal chest CT.

conclusionUndiagnosed SDB is prevalent and independently associated with ARDS. In addition, undiagnosed SDB increased the hazard of abnormal Chest CT in the midterm. STUDY REGISTER: ISRCTN16865246.

Indexed as

COVID-19Respiratory Distress SyndromeSleep Apnea SyndromesFollow-Up StudiesHumansLungMaleProspective StudiesRisk FactorsSARS-CoV-2COVID-19ObstructivePulmonary function testSARS-CoV-2Sleep apneaSleep disorder breathing

Identifiers

PMID33678579
PMCPMC7892300
OpenAlexW3133108572

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.