Evidence map›Paper›PMID 27893532›Full record

ArticleAnnals of surgery2018

The Effect of Hospital Volume on Breast Cancer Mortality.

Rachel A Greenup, Samilia Obeng-Gyasi, Samantha Thomas, K Houck, Whitney O Lane, Rachel C Blitzblau, Terry Hyslop, E Shelley Hwang

Abstract read
In one paragraph

Article in Annals of surgery, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing 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

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

  1. The requirements of a specialist breast centre.Breast (Edinburgh, Scotland) · 2020
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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.

Rachel A GreenupDuke University Medical Center, Durham, North Carolina.
Samilia Obeng-GyasiIndiana University Simon Cancer Center, Indianapolis, Indiana.
Samantha ThomasDuke Cancer Institute, Durham, North Carolina.
K HouckDuke Cancer Institute, Durham, North Carolina.
Whitney O LaneDuke University Medical Center, Durham, North Carolina.
Rachel C BlitzblauDuke University Medical Center, Durham, North Carolina.
Terry HyslopDuke Cancer Institute, Durham, North Carolina.
E Shelley HwangDuke University Medical Center, Durham, North Carolina.

Funding

Interdisciplinary Research Careers in Women's HealthK12HD043446 · NICHD · DUKE UNIVERSITY · PI AMUNDSEN, CINDY · 2002 to 2023
$9.6M
NICHD NIH HHS K12 HD043446
6 · The paper itself

Abstract

objectiveThe aim of this study was to determine whether hospital volume was associated with mortality in breast cancer, and what thresholds of case volume impacted survival.

backgroundPrior literature has demonstrated improved survival with treatment at high volume centers among less common cancers requiring technically complex surgery.

methodsAll adults (18 to 90 years) with stages 0-III unilateral breast cancer diagnosed from 2004 to 2012 were identified from the American College of Surgeons National Cancer Data Base (NCDB). A multivariable Cox proportional hazards model with restricted cubic splines was used to examine the association of annual hospital volume and overall survival, after adjusting for measured covariates. Intergroup comparisons of patient and treatment characteristics were conducted with X and analysis of variance (ANOVA). The log-rank test was used to test survival differences between groups. A multivariable Cox proportional hazards model was used to estimate hazard ratios (HRs) associated with each volume group.

resultsOne million sixty-four thousand two hundred and fifty-one patients met inclusion criteria. The median age of the sample was 60 (interquartile range 50 to 70). Hospitals were categorized into 3 groups using restricted cubic spline analysis: low-volume (<148 cases/year), moderate-volume (148 to 298 cases/year), and high-volume (>298 cases/year). Treatment at high volume centers was associated with an 11% reduction in overall mortality for all patients (HR 0.89); those with stage 0-I, ER+/PR+ or ER+/PR- breast cancers derived the greatest benefit.

conclusionsTreatment at high volume centers is associated with improved survival for breast cancer patients regardless of stage. High case volume could serve as a proxy for the institutional infrastructure required to deliver complex multidisciplinary breast cancer treatment.

Indexed as

Healthcare DisparitiesHospitals, High-VolumeHospitals, Low-VolumeAdolescentAdultAgedAged, 80 and overBreast NeoplasmsFemaleHumansMiddle AgedProportional Hazards ModelsUnited StatesYoung Adult

Identifiers

PMID27893532
PMCPMC5994238

What OpenQuestion holds

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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.