Evidence map›Paper›PMID 26299470›Full record

ArticleSleep medicine2015

Sleep-stage transitions during polysomnographic recordings as diagnostic features of type 1 narcolepsy.

Julie Anja Engelhard Christensen, Oscar Carrillo, Eileen B Leary, Paul E Peppard, Terry Young, Helge Bjarrup Dissing Sorensen, Poul Jennum, Emmanuel Mignot

Open access · greenAbstract readValidation Study
In one paragraph

Article in Sleep medicine, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
4.8field-weighted citation impact, top 5% 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

23 citing papers in PubMed, 79 citations in OpenAlex.

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  5. Current knowledge on the pathophysiology of idiopathic hypersomnia and potential mechanisms of action for low-sodium oxybate treatment.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2025
    Review
  6. Narcolepsy and rapid eye movement sleep.Journal of sleep research · 2025
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  15. Article
  16. Disrupted nighttime sleep and sleep instability in narcolepsy.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2022
    Review
  17. Recommended protocols for the Multiple Sleep Latency Test and Maintenance of Wakefulness Test in adults: guidance from the American Academy of Sleep Medicine.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2021
    Article
  18. Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 5 institutions in 2 countries.

Julie Anja Engelhard ChristensenDepartment of Electrical Engineering, Technical University of Denmark, Orsteds Plads 349, DK-2800 Kongens Lyngby, Denmark; Danish Center for Sleep Medicine, Department of Clinical Neurophysiology, Glostrup Hospital, Nordre Ringvej 57, DK-2600 Glostrup, Denmark; Stanford Center for Sleep Sciences and Medicine, Stanford University, 3165 Porter Drive, Palo Alto, CA 94304, USA.
Oscar CarrilloStanford Center for Sleep Sciences and Medicine, Stanford University, 3165 Porter Drive, Palo Alto, CA 94304, USA.
Eileen B LearyStanford Center for Sleep Sciences and Medicine, Stanford University, 3165 Porter Drive, Palo Alto, CA 94304, USA.
Paul E PeppardSchool of Medicine and Public Health, Health Sciences Learning Center, University of Wisconsin, 750 Highland Ave., Madison, WI 53705, USA.
Terry YoungSchool of Medicine and Public Health, Health Sciences Learning Center, University of Wisconsin, 750 Highland Ave., Madison, WI 53705, USA.
Helge Bjarrup Dissing SorensenDepartment of Electrical Engineering, Technical University of Denmark, Orsteds Plads 349, DK-2800 Kongens Lyngby, Denmark.
Poul JennumDanish Center for Sleep Medicine, Department of Clinical Neurophysiology, Glostrup Hospital, Nordre Ringvej 57, DK-2600 Glostrup, Denmark; Center for Healthy Aging, University of Copenhagen, Norregade 10, DK-1017 Copenhagen, Denmark.
Emmanuel MignotStanford Center for Sleep Sciences and Medicine, Stanford University, 3165 Porter Drive, Palo Alto, CA 94304, USA. Electronic address: mignot@stanford.edu.
Glostrup Hospital · DKStanford University · USUniversity of Wisconsin–Madison · USØrsted (Denmark) · DKStanford Medicine · US

Funding

EPIDEMIOLOGY OF SLEEP-DISORDERED BREATHING IN ADULTSR01HL062252 · NHLBI · UNIVERSITY OF WISCONSIN-MADISON · PI PEPPARD, PAUL E · 1999 to 2013
$14.1M
NHLBI NIH HHS R01 HL062252NHLBI NIH HHS R01HL62252
6 · The paper itself

Abstract

objectiveType 1 narcolepsy/hypocretin deficiency is characterized by excessive daytime sleepiness, sleep fragmentation, and cataplexy. Short rapid eye movement (REM) latency (≤15 min) during nocturnal polysomnography (PSG) or during naps of the multiple sleep latency test (MSLT) defines a sleep-onset REM sleep period (SOREMP), a diagnostic hallmark. We hypothesized that abnormal sleep transitions other than SOREMPs can be identified in type 1 narcolepsy.

methodsSleep-stage transitions (one to 10 epochs to one to five epochs of any other stage) and bout length features (one to 10 epochs) were extracted from PSGs. The first 15 min of sleep were excluded when a nocturnal SOREMP was recorded. F(0.1) measures and receiver operating characteristic curves were used to identify specific (≥98%) features. A data set of 136 patients and 510 sex- and age-matched controls was used for the training. A data set of 19 cases and 708 sleep-clinic patients was used for the validation.

results(1) ≥5 transitions from ≥5 epochs of stage N1 or W to ≥2 epochs of REM sleep, (2) ≥22 transitions from ≥3 epochs of stage N2 or N3 to ≥2 epochs of N1 or W, and (3) ≥16 bouts of ≥6 epochs of N1 or W were found to be highly specific (≥98%). Sensitivity ranged from 16% to 30%, and it did not vary substantially with and without medication or a nocturnal SOREMP. In patients taking antidepressants, nocturnal SOREMPs occurred much less frequently (16% vs. 36%, p < 0.001).

conclusionsIncreased sleep-stage transitions notably from ≥2.5 min of W/N1 into REM are specifically diagnostic for narcolepsy independent of a nocturnal SOREMP.

Indexed as

AdultFemaleHumansMaleMiddle AgedNarcolepsyOrexinsPolysomnographySleep, REMSleep StagesOrexinsDiagnostic featuresNarcolepsyPolysomnographySleep-stage transitions

Identifiers

PMID26299470
PMCPMC8066516
OpenAlexW1148735145

What OpenQuestion holds

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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.