Evidence map›Paper›PMID 29315434›Full record

ArticleSleep2018

Recognizable clinical subtypes of obstructive sleep apnea across international sleep centers: a cluster analysis.

Brendan T Keenan, Jinyoung Kim, Bhajan Singh, Lia Bittencourt, Ning-Hung Chen, Peter A Cistulli, Ulysses J Magalang, Nigel McArdle, Jesse W Mindel, Bryndis Benediktsdottir and 11 more

Open access · bronzeAbstract readMulticenter Study
In one paragraph

Article in Sleep, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 124 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
124citing papers in PubMed, 1 pooled it
13.7field-weighted citation impact, top 1% 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

124 citing papers in PubMed, 1 synthesis or guideline pooled it, 220 citations in OpenAlex.

  1. Validation of the STOP questionnaire as a screening tool for OSA among different populations: a systematic review and meta-regression analysis.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2022
    Pooled it
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  20. Clinical Phenotypes of Obstructive Sleep Apnea: A Decade of Evidence Toward Personalized Management.Pathophysiology : the official journal of the International Society for Pathophysiology · 2025
    Review

64 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

21 authors at 10 institutions in 7 countries.

Brendan T KeenanCenter for Sleep and Circadian Neurobiology, University of Pennsylvania, Philadelphia, PA.
Jinyoung KimCenter for Sleep and Circadian Neurobiology, University of Pennsylvania, Philadelphia, PA.
Bhajan SinghSir Charles Gairdner Hospital, Western Australian Sleep Disorders Research Institute, Nedlands, Western Australia, Australia.
Lia BittencourtDepartment of Psychobiology, Universidade Federal de São Paulo, São Paulo, Brazil.
Ning-Hung ChenDivision of Pulmonary, Critical Care, and Sleep Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
Peter A CistulliRoyal North Shore Hospital, Northern Clinical School, and Charles Perkins Centre University of Sydney, Australia.
Ulysses J MagalangDivision of Pulmonary, Allergy, Critical Care, and Sleep Medicine, The Ohio State University Wexner Medical Center, Columbus, OH.
Nigel McArdleSir Charles Gairdner Hospital, Western Australian Sleep Disorders Research Institute, Nedlands, Western Australia, Australia.
Jesse W MindelDivision of Pulmonary, Allergy, Critical Care, and Sleep Medicine, The Ohio State University Wexner Medical Center, Columbus, OH.
Bryndis BenediktsdottirDepartment of Sleep, Landspitali University Hospital, Reykjavik, Iceland.
Erna Sif ArnardottirDepartment of Sleep, Landspitali University Hospital, Reykjavik, Iceland.
Lisa Kristin ProchnowInterdisciplinary Center of Sleep Medicine, Charité University Hospital, Berlin, Germany.
Thomas PenzelInterdisciplinary Center of Sleep Medicine, Charité University Hospital, Berlin, Germany.
Bernd SannerDepartment of Pulmonary Medicine, Agaplesion Bethesda Krankenhaus Wuppertal, Wuppertal, Germany.
Richard J SchwabCenter for Sleep and Circadian Neurobiology, University of Pennsylvania, Philadelphia, PA.
Chol ShinPulmonary, Critical Care and Sleep Disorder Center, Korea University Medical Center Ansan Hospital, Seoul, South Korea.
Kate SutherlandRoyal North Shore Hospital, Northern Clinical School, and Charles Perkins Centre University of Sydney, Australia.
Sergio TufikDepartment of Psychobiology, Universidade Federal de São Paulo, São Paulo, Brazil.
Greg MaislinCenter for Sleep and Circadian Neurobiology, University of Pennsylvania, Philadelphia, PA.
Thorarinn GislasonDepartment of Sleep, Landspitali University Hospital, Reykjavik, Iceland.
Allan I PackCenter for Sleep and Circadian Neurobiology, University of Pennsylvania, Philadelphia, PA.
University of Pennsylvania · USReykjavík University · ISCharité - Universitätsmedizin Berlin · DESir Charles Gairdner Hospital · AUThe Ohio State University Wexner Medical Center · USThe University of Sydney · AUUniversidade Federal de São Paulo · BRAgaplesion Bethesda Krankenhaus · DEChang Gung Memorial Hospital · TWKorea University Medical Center · KR

Funding

Understanding the relationship between obesity and tongue fat in humans and ratsP01HL094307 · NHLBI · UNIVERSITY OF PENNSYLVANIA · PI PACK, ALLAN I · 2009 to 2020
$23.7M
The Ohio State University Center for clinical and Translational ScienceUL1TR001070 · NCATS · OHIO STATE UNIVERSITY · PI JACKSON, REBECCA D · 2013 to 2017
$22.6M
NCATS NIH HHS UL1 TR001070NHLBI NIH HHS P01 HL094307
6 · The paper itself

Abstract

Study Objectives: A recent study of patients with moderate-severe obstructive sleep apnea (OSA) in Iceland identified three clinical clusters based on symptoms and comorbidities. We sought to verify this finding in a new cohort in Iceland and examine the generalizability of OSA clusters in an international ethnically diverse cohort. Methods: Using data on 972 patients with moderate-severe OSA (apnea-hypopnea index [AHI] ≥ 15 events per hour) recruited from the Sleep Apnea Global Interdisciplinary Consortium (SAGIC), we performed a latent class analysis of 18 self-reported symptom variables, hypertension, cardiovascular disease, and diabetes. Results: The original OSA clusters of disturbed sleep, minimally symptomatic, and excessively sleepy replicated among 215 SAGIC patients from Iceland. These clusters also generalized to 757 patients from five other countries. The three clusters had similar average AHI values in both Iceland and the international samples, suggesting clusters are not driven by OSA severity; differences in age, gender, and body mass index were also generally small. Within the international sample, the three original clusters were expanded to five optimal clusters: three were similar to those in Iceland (labeled disturbed sleep, minimal symptoms, and upper airway symptoms with sleepiness) and two were new, less symptomatic clusters (labeled upper airway symptoms dominant and sleepiness dominant). The five clusters showed differences in demographics and AHI, although all were middle-aged (44.6-54.5 years), obese (30.6-35.9 kg/m2), and had severe OSA (42.0-51.4 events per hour) on average. Conclusions: Results confirm and extend previously identified clinical clusters in OSA. These clusters provide an opportunity for a more personalized approach to the management of OSA.

Indexed as

InternationalityAdultAgedBody Mass IndexCardiovascular DiseasesCluster AnalysisCohort StudiesComorbidityDiabetes MellitusDisorders of Excessive SomnolenceFemaleHumansHypertensionIcelandMaleMiddle Aged

Identifiers

PMID29315434
PMCPMC5914381
OpenAlexW2792736409

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.