Evidence map›Paper›PMID 29197986›Full record

ArticleSleep & breathing = Schlaf & Atmung2018

Relationships between MRI fat distributions and sleep apnea and obesity hypoventilation syndrome in very obese patients.

C D Turnbull, S H Wang, A R Manuel, B T Keenan, A G McIntyre, R J Schwab, J R Stradling

Open access · hybridAbstract read
In one paragraph

Article in Sleep & breathing = Schlaf & Atmung, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 3 pooled it
2.2field-weighted citation impact, top 12% 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

24 citing papers in PubMed, 3 syntheses or guidelines pooled it, 58 citations in OpenAlex.

  1. Pooled it
  2. Dynamic sleep MRI in obstructive sleep apnea: a systematic review and meta-analysis.European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2022
    Pooled it
  3. Pooled it
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  6. Correlation between abdominal visceral fat and laryngopharyngeal reflux in patients with obstructive sleep apnea.European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2025
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  7. The combination of physiology and machine learning for prediction of CPAP pressure and residual AHI in OSA.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 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 2 countries.

C D TurnbullNIHR Biomedical Research Centre, University of Oxford, Oxford, UK. christopher.turnbull@ouh.nhs.uk.
S H WangDivision of Sleep Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, USA.
A R ManuelSleep Centre, Aintree University Hospital NHS Foundation Trust, Liverpool, UK.
B T KeenanDivision of Sleep Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, USA.
A G McIntyreDepartment of Radiology, Oxford University Hospitals NHS Foundation Trust, Oxford, UK.
R J SchwabDivision of Sleep Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, USA.
J R StradlingNIHR Biomedical Research Centre, University of Oxford, Oxford, UK.
University of Pennsylvania · USOxford University Hospitals NHS Trust · GBOxford BioMedica (United Kingdom) · GBUniversity of Liverpool · GB

Funding

British Heart Foundation PG/12/80/29891
6 · The paper itself

Abstract

purposeObesity is associated with both obstructive sleep apnea (OSA) and obesity hypoventilation. Differences in adipose tissue distribution are thought to underlie the development of both OSA and hypoventilation. We explored the relationships between the distribution of upper airway, neck, chest, abdominal and muscle fat in very obese individuals.

methodsWe conducted a cross-sectional cohort study of individuals presenting to a tertiary sleep clinic or for assessment for bariatric surgery. Individuals underwent magnetic resonance (MR) imaging of their upper airway, neck, chest, abdomen and thighs; respiratory polygraphy; 1 week of autotitrating CPAP; and morning arterial blood gas to determine carbon dioxide partial pressure and base excess.

resultsFifty-three individuals were included, with mean age of 51.6 ± 8.4 years and mean BMI of 44.3 ± 7.9 kg/m

conclusionsIn very obese individuals, our results indicate that increased volumes of upper airway structures are associated with increased severity of OSA, as previously reported in less obese individuals. Increasingly large upper airway structures that reduce pharyngeal lumen size are likely to lead to OSA by increasing the collapsibility of the upper airway. However, we did not show any significant association between regional fat distribution and propensity for hypoventilation, in this population.

Indexed as

Magnetic Resonance ImagingAdipose TissueCross-Sectional StudiesFemaleHumansMaleMiddle AgedObesity Hypoventilation SyndromeObesity, MorbidProspective StudiesSleep Apnea, ObstructiveHypoventilationMagnetic resonance imagingObesityObstructive sleep apnea

Identifiers

PMID29197986
PMCPMC6133118
OpenAlexW2771288436

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.