Evidence map›Paper›PMID 33880611›Full record

ArticleJournal of neurology2021

Respiratory parameters on diagnostic sleep studies predict survival in patients with amyotrophic lateral sclerosis.

Markus Engel, Christian Glatz, Cornelia Helmle, Peter Young, Bianca Dräger, Matthias Boentert

Abstract read
In one paragraph

Article in Journal of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

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

  1. Pooled it
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  3. Review
  4. Uncoupling of apnea-hypopnea index and oxygen desaturation in als: characterization and diagnostic implications of an "AHI-SpO₂ dissociation" phenotype.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 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

6 authors.

Markus EngelDepartment of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster, Germany.
Christian GlatzDepartment of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster, Germany.
Cornelia HelmleDepartment of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster, Germany.
Peter YoungDepartment of Neurology, Medical Park Reithofpark, Bad Feilnbach, Germany.
Bianca DrägerDepartment of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster, Germany.
Matthias BoentertDepartment of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster, Germany. matthias.boentert@ukmuenster.de.ORCID http://orcid.org/0000-0001-6133-1397

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveIn amyotrophic lateral sclerosis (ALS), respiratory muscle involvement and sleep-disordered breathing relate to worse prognosis. The present study investigated whether respiratory outcomes on first-ever sleep studies predict survival in patients with ALS, specifically taking into account subsequent initiation of non-invasive ventilation (NIV).

methodsFrom patients with ALS, baseline sleep study records, transcutaneous capnometry, early morning blood gas analysis, survival data and clinical disease characteristics were retrospectively analyzed. Patients were stratified according to whether enduring NIV was consecutively established ("NIV(+)") or not ("NIV(-)").

resultsAmong the study cohort (n = 158, 72 female, 51 with bulbar onset ALS, 105 deceased) sleep-disordered breathing was present at baseline evaluation in 97 patients. Early morning base excess (EMBE) > 2 mmol/l predicted nocturnal hypercapnia. Ninety-five patients were NIV(+) and 63 were NIV(-). Survival from baseline sleep studies was significantly reduced in NIV(-) but not in NIV(+) patients with nocturnal CO

interpretationIn patients with ALS, EMBE > 2 mmol/l predicts nocturnal hypercapnia and shorter survival. Negative effects of sleep-disordered breathing on survival are statistically abolished by sustained NIV.

Indexed as

Amyotrophic Lateral SclerosisNoninvasive VentilationRespiratory InsufficiencyFemaleHumansPolysomnographyRetrospective StudiesSleepAmyotrophic lateral sclerosisBase ecxessNocturnal hypercapniaNon-invasive ventilationSleep-disordered breathingSurvival

Identifiers

PMID33880611
PMCPMC8505303

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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.