Evidence map›Paper›PMID 20305302›Full record

ArticleBMJ (Clinical research ed.)2010

The volume-mortality relation for radical cystectomy in England: retrospective analysis of hospital episode statistics.

Erik K Mayer, Alex Bottle, Ara W Darzi, Thanos Athanasiou, Justin A Vale

Abstract readMulticenter Study
In one paragraph

Article in BMJ (Clinical research ed.), 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 3 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

19 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Systematic review of discharge coding accuracy.Journal of public health (Oxford, England) · 2012
    Pooled it
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  10. Observational
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  14. Is a clear benefit in survival enough to modify patient access to the surgery service? A retrospective analysis in a cohort of gastric cancer patients.Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association · 2015
    Article
  15. Article
  16. Article
  17. Impact of academic affiliation on radical cystectomy outcomes in North America: A population-based study.Canadian Urological Association journal = Journal de l'Association des urologues du Canada · 2012
    Article
  18. Comparing baseline symptom severity and demographics over two time periods in an outpatient palliative radiotherapy clinic.Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer · 2012
    Article
  19. Proactive approach to treat high-grade lamina-invasive bladder cancer.Indian journal of urology : IJU : journal of the Urological Society of India · 2011
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors.

Erik K MayerDivision of Surgery, Department of Surgery and Cancer, Imperial College London, St Mary's Hospital Campus, London W2 1NY. e.mayer@imperial.ac.uk
Alex Bottle
Ara W Darzi
Thanos Athanasiou
Justin A Vale

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesTo investigate the relation between volume and mortality after adjustment for case mix for radical cystectomy in the English healthcare setting using improved statistical methodology, taking into account the institutional and surgeon volume effects and institutional structural and process of care factors.

designRetrospective analysis of hospital episode statistics using multilevel modelling.

settingEnglish hospitals carrying out radical cystectomy in the seven financial years 2000/1 to 2006/7.

participantsPatients with a primary diagnosis of cancer undergoing an inpatient elective cystectomy.

main outcome measureMortality within 30 days of cystectomy.

resultsCompared with low volume institutions, medium volume ones had a significantly higher odds of in-hospital and total mortality: odds ratio 1.72 (95% confidence interval 1.00 to 2.98, P=0.05) and 1.82 (1.08 to 3.06, P=0.02). This was only seen in the final model, which included adjustment for structural and processes of care factors. The surgeon volume-mortality relation showed weak evidence of reduced odds of in-hospital mortality (by 35%) for the high volume surgeons, although this did not reach statistical significance at the 5% level.

conclusionsThe relation between case volume and mortality after radical cystectomy for bladder cancer became evident only after adjustment for structural and process of care factors, including staffing levels of nurses and junior doctors, in addition to case mix. At least for this relatively uncommon procedure, adjusting for these confounders when examining the volume-outcome relation is critical before considering centralisation of care to a few specialist institutions. Outcomes other than mortality, such as functional morbidity and disease recurrence may ultimately influence towards centralising care.

Indexed as

AgedCystectomyEnglandEpidemiologic MethodsFemaleHealth Facility SizeHospitalizationHumansMaleTreatment OutcomeUrinary Bladder Neoplasms

Identifiers

PMID20305302
PMCPMC2842924

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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.