Evidence map›Paper›PMID 25595147›Full record

ArticleBrain : a journal of neurology2015

Increased sleep need and daytime sleepiness 6 months after traumatic brain injury: a prospective controlled clinical trial.

Lukas L Imbach, Philipp O Valko, Tongzhou Li, Angelina Maric, Evangelia-Regkina Symeonidou, John F Stover, Claudio L Bassetti, Ladislav Mica, Esther Werth, Christian R Baumann

Open access · bronzeAbstract readEditorial
In one paragraph

Article in Brain : a journal of neurology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed, 2 pooled it
8.9field-weighted citation impact, top 2% 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

45 citing papers in PubMed, 2 syntheses or guidelines pooled it, 137 citations in OpenAlex.

  1. Pooled it
  2. Sleep Disturbances in Traumatic Brain Injury: A Meta-Analysis.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2016
    Pooled it
  3. Trial
  4. Poorer sleep quality predicts melatonin response in patients with traumatic brain injury: findings from a randomized controlled trial.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2021
    Trial
  5. Article
  6. Article
  7. Article
  8. Article
  9. Cerebral Gray Matter May Not Explain Sleep Slow-Wave Characteristics after Severe Brain Injury.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2024
    Article
  10. Article
  11. Article
  12. Review
  13. Review
  14. Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Insomnia in neurological diseases.Neurological research and practice · 2021
    Article
  20. Article
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

10 authors at 2 institutions in 1 country.

Lukas L Imbach1 Department of Neurology, University Hospital Zurich, 8091 Zurich, Switzerland christian.baumann@usz.ch.
Philipp O Valko1 Department of Neurology, University Hospital Zurich, 8091 Zurich, Switzerland.
Tongzhou Li1 Department of Neurology, University Hospital Zurich, 8091 Zurich, Switzerland.
Angelina Maric1 Department of Neurology, University Hospital Zurich, 8091 Zurich, Switzerland.
Evangelia-Regkina Symeonidou1 Department of Neurology, University Hospital Zurich, 8091 Zurich, Switzerland.
John F Stover2 Department of Traumatology, University Hospital Zurich, 8091 Zurich, Switzerland.
Claudio L Bassetti3 Department of Neurology, Inselspital Bern, 3010 Bern, Switzerland.
Ladislav Mica2 Department of Traumatology, University Hospital Zurich, 8091 Zurich, Switzerland.
Esther Werth1 Department of Neurology, University Hospital Zurich, 8091 Zurich, Switzerland.
Christian R Baumann1 Department of Neurology, University Hospital Zurich, 8091 Zurich, Switzerland.
University Hospital of Zurich · CHUniversity Hospital of Bern · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Post-traumatic sleep-wake disturbances are common after acute traumatic brain injury. Increased sleep need per 24 h and excessive daytime sleepiness are among the most prevalent post-traumatic sleep disorders and impair quality of life of trauma patients. Nevertheless, the relation between traumatic brain injury and sleep outcome, but also the link between post-traumatic sleep problems and clinical measures in the acute phase after traumatic brain injury has so far not been addressed in a controlled and prospective approach. We therefore performed a prospective controlled clinical study to examine (i) sleep-wake outcome after traumatic brain injury; and (ii) to screen for clinical and laboratory predictors of poor sleep-wake outcome after acute traumatic brain injury. Forty-two of 60 included patients with first-ever traumatic brain injury were available for follow-up examinations. Six months after trauma, the average sleep need per 24 h as assessed by actigraphy was markedly increased in patients as compared to controls (8.3 ± 1.1 h versus 7.1 ± 0.8 h, P < 0.0001). Objective daytime sleepiness was found in 57% of trauma patients and 19% of healthy subjects, and the average sleep latency in patients was reduced to 8.7 ± 4.6 min (12.1 ± 4.7 min in controls, P = 0.0009). Patients, but not controls, markedly underestimated both excessive sleep need and excessive daytime sleepiness when assessed only by subjective means, emphasizing the unreliability of self-assessment of increased sleep propensity in traumatic brain injury patients. At polysomnography, slow wave sleep after traumatic brain injury was more consolidated. The most important risk factor for developing increased sleep need after traumatic brain injury was the presence of an intracranial haemorrhage. In conclusion, we provide controlled and objective evidence for a direct relation between sleep-wake disturbances and traumatic brain injury, and for clinically significant underestimation of post-traumatic sleep-wake disturbances by trauma patients.

Indexed as

ActigraphyAdultAnalysis of VarianceBrain InjuriesCircadian RhythmDisability EvaluationDisorders of Excessive SomnolenceEpinephrineFemaleHumansMaleMiddle AgedPolysomnographyProspective StudiesRetrospective StudiesS100 ProteinsEpinephrineS100 Proteinspost-traumatic daytime sleepinesspost-traumatic pleiosomniasleeptraumatic brain injury

Identifiers

PMID25595147
PMCPMC4408434
OpenAlexW2127200406

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.