Evidence map›Paper›PMID 29518210›Full record

SynthesisNeuro-oncology2018

The clinical trials landscape for glioblastoma: is it adequate to develop new treatments?

Alyssa M Vanderbeek, Rifaquat Rahman, Geoffrey Fell, Steffen Ventz, Tianqi Chen, Robert Redd, Giovanni Parmigiani, Timothy F Cloughesy, Patrick Y Wen, Lorenzo Trippa and 1 more

Abstract readMeta-Analysis
In one paragraph

Synthesis in Neuro-oncology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 97 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
97citing 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

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

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Trial
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  6. Article
  7. Accelerating discovery: Transformative clinical trial models in neuro-oncology.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2026
    Review
  8. Review
  9. Article
  10. Article
  11. Does human cytomegalovirus provide a novel therapeutic target for patients with glioblastoma?Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  12. Review
  13. Article
  14. Review
  15. Review
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article

37 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors.

Alyssa M VanderbeekDepartment of Radiation Oncology, Harvard Medical School, Boston, Massachusetts.
Rifaquat RahmanDepartment of Radiation Oncology, Harvard Medical School, Boston, Massachusetts.
Geoffrey FellDana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts.
Steffen VentzDana-Farber Program in Regulatory Science, Harvard Medical School, Boston, Massachusetts.
Tianqi ChenDana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts.
Robert ReddDana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts.
Giovanni ParmigianiDana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts.
Timothy F CloughesyUniversity of California Los Angeles, Neuro-Oncology Program.
Patrick Y WenCenter for Neuro-Oncology, Harvard Medical School, Boston, Massachusetts.
Lorenzo TrippaDana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts.
Brian M AlexanderDepartment of Radiation Oncology, Harvard Medical School, Boston, Massachusetts.

Funding

UCLA SPORE in Brain CancerP50CA211015 · NCI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI Yvonne Yu-Hsuan Chen · 2017 to 2026
$25.2M
NCI NIH HHS P50 CA211015
6 · The paper itself

Abstract

Background: There have been few treatment advances for patients with glioblastoma (GBM) despite increasing scientific understanding of the disease. While factors such as intrinsic tumor biology and drug delivery are challenges to developing efficacious therapies, it is unclear whether the current clinical trial landscape is optimally evaluating new therapies and biomarkers. Methods: We queried ClinicalTrials.gov for interventional clinical trials for patients with GBM initiated between January 2005 and December 2016 and abstracted data regarding phase, status, start and end dates, testing locations, endpoints, experimental interventions, sample size, clinical presentation/indication, and design to better understand the clinical trials landscape. Results: Only approximately 8%-11% of patients with newly diagnosed GBM enroll on clinical trials with a similar estimate for all patients with GBM. Trial duration was similar across phases with median time to completion between 3 and 4 years. While 93% of clinical trials were in phases I-II, 26% of the overall clinical trial patient population was enrolled on phase III studies. Of the 8 completed phase III trials, only 1 reported positive results. Although 58% of the phase III trials were supported by phase II data with a similar endpoint, only 25% of these phase II trials were randomized. Conclusions: The clinical trials landscape for GBM is characterized by long development times, inadequate dissemination of information, suboptimal go/no-go decision making, and low patient participation.

Indexed as

Decision MakingInformation DisseminationClinical Trials as TopicGlioblastomaHumansPatient Participation

Identifiers

PMID29518210
PMCPMC6280141

What Socratic holds

Textmetadata
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 Socratic graph.