Evidence map›Paper›PMID 34735442›Full record

SynthesisPloS one2021

Hypofractionated radiotherapy for newly diagnosed elderly glioblastoma patients: A systematic review and network meta-analysis.

Suely Maymone de Melo, Gustavo Nader Marta, Carolina de Oliveira Cruz Latorraca, Camila Bertini Martins, Orestis Efthimiou, Rachel Riera

Abstract readSystematic ReviewNetwork Meta-Analysis
In one paragraph

Synthesis in PloS one, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing 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

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

  1. Pooled it
  2. Article
  3. Review
  4. Article
  5. Article
  6. Optimal managements of elderly patients with glioblastoma.Japanese journal of clinical oncology · 2022
    Review
  7. 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

6 authors.

Suely Maymone de MeloNeuro-Oncology-Hospital do Coração de Sao Paulo, Sao Paulo, Brazil.ORCID 0000-0003-4799-7525
Gustavo Nader MartaDepartment of Radiation Oncology-Hospital Sírio-Libanês, Sao Paulo, Brazil.
Carolina de Oliveira Cruz LatorracaHospital São Paulo, Universidade Federal de São Paulo (Unifesp), São Paulo, Brazil.
Camila Bertini MartinsDepartment of Preventive Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo (Unifesp), Sao Paulo, Brazil.ORCID 0000-0002-8252-8815
Orestis EfthimiouInstitute of Social and Preventive Medicin-Universität Bern, Bern, Switzerland.ORCID 0000-0002-0955-7572
Rachel RieraDiscpline of Evidence-based Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo (Unifesp), Sao Paulo, Brazil.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo evaluate different hypofractionated radiotherapy (HRT) regimens for newly diagnosed elderly glioblastoma (GBM) patients.

methodsWe performed a systematic review with network meta-analysis (NMA), including searches on CENTRAL, Medline, EMBASE, CINAHL, clinical trial databases and manual search. Only randomized clinical trials (RCTs) were included. Primary outcomes: overall survival (OS) and adverse events (AE). Secondary outcomes: progression-free-survival (PFS) and quality of life (QoL). We used the Cochrane Risk of Bias (RoB) table for assessing individual studies and CINeMA for evaluating the certainty of the final body of evidence.

resultsFour RCTs (499 patients) were included. For OS, the estimates from NMA did not provide strong evidence of a difference between the HRTs: 40 Gray (Gy) versus 45 Gy (HR: 0.89; CI 95%: 0.42, 1.91); 34 Gy versus 45 Gy (HR: 0.85; CI 95% 0.43, 1.70); 25 Gy versus 45 Gy (HR: 0.81; CI 95% 0.32, 2.02); 34 Gy versus 40 Gy (HR: 0.95; CI 95% 0.57, 1.61); and 25 Gy versus 34 Gy (HR: 0.95; CI 95% 0.46, 1.97). We performed qualitative synthesis for AE and QoL due to data scarcity and clinical heterogeneity among studies. The four studies reported a similar QoL (assessed by different methods) between arms. One RCT reported grade ≥ 3 AE, with no evidence of a difference between arms. PFS was reported in one study (25 Gy versus 40 Gy), with no evidence of a difference between arms.

conclusionThis review found no evidence of a difference between the evaluated HRTs for efficacy and safety.

Indexed as

Risk AssessmentAgedGlioblastomaHumansProgression-Free SurvivalQuality of LifeRadiation Dose HypofractionationRandomized Controlled Trials as Topic

Identifiers

PMID34735442
PMCPMC8568110

What OpenQuestion holds

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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.