Evidence map›Paper›PMID 31650043›Full record

ArticleClinical and translational radiation oncology2019

Proton beam therapy delivered using pencil beam scanning vs. passive scattering/uniform scanning for localized prostate cancer: Comparative toxicity analysis of PCG 001-09.

Mark V Mishra, Rahul Khairnar, Søren M Bentzen, Gary Larson, Henry Tsai, Christopher Sinesi, Carlos Vargas, George Laramore, Carl Rossi, Lane Rosen and 2 more

Abstract read
In one paragraph

Article in Clinical and translational radiation oncology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 2 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

15 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
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  7. Review
  8. Article
  9. Article
  10. Article
  11. Consensus Statement on Proton Therapy for Prostate Cancer.International journal of particle therapy · 2021
    Article
  12. Article
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  14. Article
  15. Simulation of dose distribution and secondary particle production in proton therapy of brain tumor.Reports of practical oncology and radiotherapy : journal of Greatpoland Cancer Center in Poznan and Polish Society of Radiation Oncology
    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

12 authors.

Mark V MishraDepartment of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD, United States.
Rahul KhairnarPharmaceutical Health Services Research, University of Maryland School of Pharmacy, Baltimore, MD, United States.
Søren M BentzenDepartment of Epidemiology & Public Health, Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD, United States.
Gary LarsonProCure Proton Therapy Center, Oklahoma City, OK, United States.
Henry TsaiProCure Proton Therapy Center, Somerset, NJ, United States.
Christopher SinesiHampton University Proton Therapy Institute, Hampton, VA, United States.
Carlos VargasDepartment of Radiation Oncology, Mayo Clinic Arizona, Phoenix, AZ, United States.
George LaramoreUniversity of Washington, Department of Radiation Oncology, Seattle, WA, United States.
Carl RossiCalifornia Protons Cancer Therapy Center, San Diego, CA, United States.
Lane RosenWillis-Knighton Proton Therapy Center, Shreveport, LA, United States.
Mingyao ZhuDepartment of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD, United States.
William HartsellNorthwestern Medicine Chicago Proton Center, Warrenville, IL, United States.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposePatient-level benefits of proton beam therapy (PBT) relative to photon therapy for prostate cancer (PC) continue to be the focus of debate. Although trials comparing the two modalities are underway, most are being conducted using "conventional" PBT (passive scattering/uniform scanning [PS/US]) rather than pencil beam scanning (PBS). The dosimetric benefits of PBS are well-known, but comparative data are limited. This analysis compares PBS toxicity rates with those of PS/US in a prospective multicenter registry.

methodsWe evaluated acute/late gastrointestinal (GI) and genitourinary (GU) toxicity rates for men with low-to-intermediate risk PC enrolled in PCG 001-09. Acute toxicities with the two techniques were compared using χ

resultsPatients were treated using PS/US (n = 1105) or PBS (n = 238). Acute grade ≥2 GI toxicity in PBS did not significantly differ from that with PS/US (2.9% and 2.1%, respectively; P = 0.47). Acute grade ≥2 GU toxicity was significantly higher with PBS (21.9% and 15.1%; P < 0.01). In MVA, PBS was significantly associated with increased acute grade ≥2 GU toxicity (RR = 1.57, p < 0.001). Late grade ≥2 GI and GU toxicities did not differ significantly between groups.

conclusionsThis is the first multi-institutional comparative effectiveness evaluation of PBT techniques in PC. Differences in acute GU toxicity warrant further evaluation, and highlight the urgent need for prospective data using PBT.

Indexed as

Comparative effectiveness, ToxicityCTCAE, Common Terminology Criteria for Adverse EventsGI, gastrointestinalGU, genitourinaryLET, linear energy transferMVA, multivariable analysisPARTIQoL, Prostate Advanced Radiation Technologies Investigating Quality of LifePassive scattering, uniform scanningPBS, pencil beam scanningPBT, proton beam therapyPCG, Proton Collaborative GroupPC, prostate cancerPencil beam scanningProstate cancerProton therapyPS/US, passive scattering/uniform scanningRBE, relative biological effectivenessRT, radiation therapy

Identifiers

PMID31650043
PMCPMC6804653

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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.