Evidence map›Paper›PMID 31699721›Full record

SynthesisBMJ open2019

Comorbidity in adults with traumatic brain injury and all-cause mortality: a systematic review.

Chen Xiong, Sara Hanafy, Vincy Chan, Zheng Jing Hu, Mitchell Sutton, Michael Escobar, Angela Colantonio, Tatyana Mollayeva

Abstract readSystematic Review
In one paragraph

Synthesis in BMJ open, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 1 pooled it
–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

26 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Molecular characterization ofOpen veterinary journal · 2026
    Article
  7. Article
  8. Article
  9. Review
  10. Review
  11. A study of traumatic brain injury in Puerto Rico.The journal of the International Society of Physical and Rehabilitation Medicine · 2025
    Article
  12. Article
  13. Review
  14. ASA score is an independent predictor of 1-year outcome after moderate-to-severe traumatic brain injury.Scandinavian journal of trauma, resuscitation and emergency medicine · 2025
    Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Review
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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

8 authors.

Chen XiongRehabilitation Sciences Institute, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada chen.xiong@mail.utoronto.ca.
Sara HanafyRehabilitation Sciences Institute, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
Vincy ChanKITE-Toronto Rehab-University Health Network, Toronto, Ontario, Canada.
Zheng Jing HuKITE-Toronto Rehab-University Health Network, Toronto, Ontario, Canada.
Mitchell SuttonKITE-Toronto Rehab-University Health Network, Toronto, Ontario, Canada.
Michael EscobarDalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.
Angela ColantonioRehabilitation Sciences Institute, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
Tatyana MollayevaKITE-Toronto Rehab-University Health Network, Toronto, Ontario, Canada.ORCID 0000-0002-2787-1848

Funding

Comorbidity in traumatic brain injury and risk of all-cause mortality, functional and financial burden: a decade-long population based cohort studyR21HD089106 · NICHD · UNIVERSITY HEALTH NETWORK · PI COLANTONIO, ANGELA · 2016 to 2017
$297k
CIHRNICHD NIH HHS R21 HD089106
6 · The paper itself

Abstract

objectivesComorbidity in traumatic brain injury (TBI) has been recognised to alter the clinical course of patients and influence short-term and long-term outcomes. We synthesised the evidence on the effects of different comorbid conditions on early and late mortality post-TBI in order to (1) examine the relationship between comorbid condition(s) and all-cause mortality in TBI and (2) determine the influence of sociodemographic and clinical characteristics of patients with a TBI at baseline on all-cause mortality.

designSystematic review. DATA SOURCES: Medline, Central, Embase, PsycINFO and bibliographies of identified articles were searched from May 1997 to January 2019. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Included studies met the following criteria: (1) focused on comorbidity as it related to our outcome of interest in adults (ie, ≥18 years of age) diagnosed with a TBI; (2) comorbidity was detected by any means excluding self-report; (3) reported the proportion of participants without comorbidity and (4) followed participants for any period of time. DATA EXTRACTION AND SYNTHESIS: Two independent reviewers extracted the data and assessed risk of bias using the Quality in Prognosis Studies tool. Data were synthesised through tabulation and qualitative description.

resultsA total of 27 cohort studies were included. Among the wide range of individual comorbid conditions studied, only low blood pressure was a consistent predictors of post-TBI mortality. Other consistent predictors were traditional sociodemographic risk factors. Higher comorbidity scale, scores and the number of comorbid conditions were not consistently associated with post-TBI mortality.

conclusionsGiven the high number of comorbid conditions that were examined by the single studies, research is required to further substantiate the evidence and address conflicting findings. Finally, an enhanced set of comorbidity measures that are suited for the TBI population will allow for better risk stratification to guide TBI management and treatment. PROSPERO REGISTRATION NUMBER: CRD42017070033.

Indexed as

ComorbidityAdultBrain Injuries, TraumaticHumansMortalityRisk Factorscomorbiditymortalityreviewsocio-demographicstraumatic brain injury

Identifiers

PMID31699721
PMCPMC6858248

What OpenQuestion holds

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LicenceCC BY-NC
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.