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Related Experiment Video

Updated: Mar 12, 2026

Evaluating the Effectiveness of Cancer Drug Sensitization In Vitro and In Vivo
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Target trial emulation in oncology: current use and future directions.

Hui-Yao Huang1, Le Wang2, Sheng Xu3

  • 1Clinical Trials Center, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021 China.

Military Medical Research
|March 11, 2026
PubMed
Summary

Target trial emulation (TTE) in oncology faces challenges like bias and data limitations. Improving data sources and regulatory acceptance is key to enhancing TTE

Keywords:
BiasOncologyReal-world databaseTarget trial emulation (TTE)

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Area of Science:

  • Observational studies
  • Causal inference
  • Oncology research

Background:

  • Target trial emulation (TTE) enhances causal inference from observational data.
  • Knowledge gaps exist regarding TTE application, challenges, and insights in oncology.

Purpose of the Study:

  • To systematically review TTE studies in oncology.
  • To identify common data sources, endpoints, biases, and challenges.
  • To assess TTE's role in calibrating randomized controlled trials (RCTs).

Main Methods:

  • Systematic review of 90 TTE studies in cancer areas via PubMed and Embase.
  • Analysis of data sources, primary endpoints, biases, and RCT calibration.
  • Evaluation of statistical and estimate agreement for RCT calibration.

Main Results:

  • Registry databases and overall survival (OS) were common.
  • Significant immortal time bias (55.6%) and prevalent user bias (38.9%) were noted.
  • Only 42.9% of TTE studies calibrating RCTs met agreement criteria.

Conclusions:

  • Limited fit-for-purpose data and uncertainty in result concordance hinder oncology TTE.
  • Promoting regulatory acceptance and improving data integration are crucial.
  • Recommendations include enhancing data sources, standardizing endpoints like OS, and modernizing criteria.