Evidence map›Paper›PMID 29796198›Full record

ArticleSleep science (Sao Paulo, Brazil)

Reproducibility and predictors of the apnea hypopnea index across multiple nights.

Hisham Alshaer, Clodagh Ryan, Geoff R Fernie, T Douglas Bradley

Abstract read
In one paragraph

Article in Sleep science (Sao Paulo, Brazil). The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
–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

10 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Validation of a nonwearable device in healthy adults with normal and short sleep durations.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2022
    Article
  7. Article
  8. Night-to-night fluctuations in sleep apnea severity: diagnostic and treatment implications.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2020
    Article
  9. Article
  10. Review
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

4 authors.

Hisham AlshaerSleep Research Laboratory and Home & Community Team, Toronto Rehabilitation Institute, University Health Network, Toronto, ON, Canada.
Clodagh RyanDepartment of Medicine, University of Toronto and Sleep Research Laboratory of the Toronto Rehabilitation Institute, University Health Network, Toronto, ON, Canada.
Geoff R FernieDepartment of Surgery, University of Toronto, and Toronto Rehabilitation Institute, University Health Network, Toronto, ON, Canada.
T Douglas BradleySleep Research Laboratories of the Toronto Rehabilitation Institute and Toronto General Hospital, University Health Network, Toronto, ON, Canada. Centre for Sleep Medicine and Circadian Biology of the University of Toronto, Toronto, ON, Canada.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAttended polysomnography (PSG) is the standard diagnostic test for sleep apnea (SA). However, due to internight variability in SA, a single night PSG may not accurately reflect the true severity of SA. Although internight variability is a well-known phenomenon, its root causes have not been fully elucidated. The objective of this study was to determine factors associated with internight variability in the apnea-hypopnea index (AHI) and its magnitude in the home environment.

methodsEach participant had a full overnight PSG simultaneous with a validated portable sleep apnea monitoring device (BresoDx

resultsForty patients completed the protocol. The correlation between PSG and simultaneous BresoDx derived AHIs was 93.4%. Inter-class correlation between the three nights' AHIs was 89.2%. Over two-thirds (67.5%) of patients had consistent AHIs across the three nights while 32.5% had variable AHI. AHI variability was significantly associated with supine-SA (

conclusionAlthough portable monitoring was highly reproducible over three nights in the majority of participants, one third had a variable AHI. Supine-SA and high AHI on the first night were predictors of high internight variability.

Indexed as

Sleep Apnea SyndromesSleep MonitoringSupine Position

Identifiers

PMID29796198
PMCPMC5916573

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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.