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Updated: Jul 6, 2026
09:19
Evaluating the Effectiveness of Cancer Drug Sensitization In Vitro and In Vivo
Published on: February 6, 2015
Noncompliance in cancer screening trials
1Center for Statistical Sciences and the Department of Community Health, Brown University School of Medicine, Providence, RI 02912, USA. igareen@stat.brown.edu
Clinical Trials (London, England)
|September 13, 2007
Summary
Noncompliance with cancer screening, follow-up, and treatment can skew trial results. Adjusting efficacy estimates for noncompliance is crucial for accurate cancer mortality reduction data.
Area of Science:
- Clinical Trials
- Cancer Screening
- Health Services Research
Background:
- Cancer screening trials may overestimate efficacy due to participant noncompliance.
- Noncompliance with screening is recognized, but noncompliance with diagnostic follow-up and treatment is understudied.
Purpose of the Study:
- To assess the impact of noncompliance with screening, follow-up, and treatment in cancer screening trials.
- To highlight the significance of addressing all forms of noncompliance for accurate trial outcomes.
Main Methods:
- Describing challenges of noncompliance in screening trials.
- Illustrating the impact of noncompliance with a case example.
- Discussing measurement issues for follow-up and treatment noncompliance.
Main Results:
- Efficacy estimates in screening trials can be adjusted for noncompliance.
- Systematic measurement of noncompliance across trial arms is essential.
- Data on compliance-associated factors can refine efficacy estimates and interventions.
Conclusions:
- Noncompliance can significantly alter cancer mortality reduction estimates in trials.
- Statistical methods exist to adjust efficacy estimates for noncompliance.
- Collecting compliance data for screening, follow-up, and treatment is vital for cancer screening trials.
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