Evidence map›Paper›PMID 33313810›Full record

ArticleNeurosurgery2021

Aneurysmal Subarachnoid Hemorrhage: Trends, Outcomes, and Predictions From a 15-Year Perspective of a Single Neurocritical Care Unit.

Owen B Samuels, Ofer Sadan, Chen Feng, Kathleen Martin, Khalid Medani, Yajun Mei, Daniel L Barrow

Open access · hybridAbstract read
In one paragraph

Article in Neurosurgery, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed, 2 pooled it
2.6field-weighted citation impact, top 8% 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

41 citing papers in PubMed, 2 syntheses or guidelines pooled it, 65 citations in OpenAlex.

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  9. Prognosis of subarachnoid hemorrhage determined by intracranial pressure thresholds.Journal of cerebrovascular and endovascular neurosurgery · 2025
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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

7 authors at 3 institutions in 1 country.

Owen B SamuelsDepartment of Neurology and Neurosurgery, Division of Neurocritical Care, Emory University Hospital and School of Medicine, Atlanta, Georgia.
Ofer SadanDepartment of Neurology and Neurosurgery, Division of Neurocritical Care, Emory University Hospital and School of Medicine, Atlanta, Georgia.
Chen FengH. Milton Stewart School of Industrial and Systems Engineering, Georgia Institute of Technology, Atlanta, Georgia.
Kathleen MartinDepartment of Neurology and Neurosurgery, Division of Neurocritical Care, Emory University Hospital and School of Medicine, Atlanta, Georgia.
Khalid MedaniDepartment of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University School of Medicine, Atlanta, Georgia.
Yajun MeiH. Milton Stewart School of Industrial and Systems Engineering, Georgia Institute of Technology, Atlanta, Georgia.
Daniel L BarrowDepartment of Neurosurgery, Emory University Hospital and School of Medicine, Atlanta, Georgia.
Emory University Hospital · USGeorgia Institute of Technology · USEmory University · US

Funding

Implementing a Maternal health and PRegnancy Outcomes Vision for Everyone (IMPROVE)UL1TR002378 · NCATS · EMORY UNIVERSITY · PI Andres J Garcia, Elizabeth O. Ofili · 2017 to 2026
$92.1M
NCATS NIH HHS UL1 TR002378
6 · The paper itself

Abstract

backgroundAneurysmal subarachnoid hemorrhage (aSAH) is associated with disproportionally high mortality and long-term neurological sequelae. Management of patients with aSAH has changed markedly over the years, leading to improvements in outcome.

objectiveTo describe trends in aSAH care and outcome in a high-volume single center 15-yr cohort.

methodsAll new admissions diagnosed with subarachnoid hemorrhage (SAH) to our tertiary neuro-intensive care unit between 2002 and 2016 were reviewed. Trend analysis was performed to assess temporal changes and a step-wise regression analysis was done to identify factors associated with outcomes.

resultsOut of 3970 admissions of patients with SAH, 2475 patients proved to have a ruptured intracranial aneurysm. Over the years of the study, patient acuity increased by Hunt & Hess (H&H) grade and related complications. Endovascular therapies became more prevalent over the years, and were correlated with better outcome. Functional outcome overall improved, yet the main effect was noted in the low- and intermediate-grade patients. Several parameters were associated with poor functional outcome, including long-term mechanical ventilation (odds ratio 11.99, CI 95% [7.15-20.63]), acute kidney injury (3.55 [1.64-8.24]), pneumonia (2.89 [1.89-4.42]), hydrocephalus (1.80 [1.24-2.63]) diabetes mellitus (1.71 [1.04-2.84]), seizures (1.69 [1.07-2.70], H&H (1.67 [1.45-1.94]), and age (1.06 [1.05-1.07]), while endovascular approach to treat the aneurysm, compared with clip-ligation, had a positive effect (0.35 [0.25-0.48]).

conclusionThis large, single referral center, retrospective analysis reveals important trends in the treatment of aSAH. It also demonstrates that despite improvement in functional outcome over the years, systemic complications remain a significant risk factor for poor prognosis. The historic H&H determination of outcome is less valid with today's improved care.

Indexed as

AdultAgedAneurysm, RupturedCohort StudiesEndovascular ProceduresFemaleHumansIntensive Care UnitsIntracranial AneurysmMaleMiddle AgedPredictive Value of TestsRetrospective StudiesRisk FactorsSubarachnoid HemorrhageTime FactorsCerebral aneurysmMedical complicationsNeurocritical carePatient outcomesSubarachnoid hemorrhage

Identifiers

PMID33313810
PMCPMC8133330
OpenAlexW3117124082

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.