Related Experiment Video
Updated: Aug 9, 2026

A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
Published on: September 20, 2019
The selection of patients for controlled trials
Abstract:
The selection of patients for testing drugs is a very complicated process even overtly; subconscious bias must be avoided and our social conscience respected. It is of prime importance to define in advance exactly what you want to test and this may include not only the therapeutic and pharmacological effects and side-effects, the long-term neoplastic potential, the mutagenic effects and the effects on the foetus, but also mundane effects like credibility, acceptance, and even taste! Patient selection is not just "Attention there Volunteers nos. 1,3,5,7,9,....step forward smartly from the left". It is a complicated process in which there is inevitably some bias and our job is to see that any biases which are included do not bias the results, and that the results are understood to apply to this particular selection of patients and not to any other. Too many explicit exclusions therefore make results less useful because less widely relevant.
Insights
Patient selection for drug trials is complex, requiring careful consideration of biases and defining test parameters comprehensively. Ensuring results are relevant to the selected patient group is crucial for meaningful outcomes.
Area of Science:
- Clinical pharmacology
- Drug development
- Patient recruitment
Background:
- Patient selection for clinical trials is a complex process.
- Subconscious bias and social conscience are critical considerations.
- Defining the scope of testing is paramount before patient selection.
Purpose of the Study:
- To highlight the complexities of patient selection in drug testing.
- To emphasize the need for comprehensive parameter definition.
- To discuss the impact of bias and exclusions on result relevance.
Main Methods:
- The abstract discusses the conceptual framework of patient selection.
- It emphasizes defining all testing parameters, including therapeutic, pharmacological, and mundane effects.
- It addresses the management of inevitable biases in patient groups.
Main Results:
- Patient selection involves more than simple recruitment; it requires careful planning.
- Comprehensive definition of test parameters (therapeutic, side-effects, long-term, fetal effects, acceptance, taste) is essential.
- Managing bias and understanding the specific applicability of results to the selected cohort are key.
Conclusions:
- Effective patient selection balances comprehensive testing with managing bias.
- Overly strict exclusions can limit the generalizability and usefulness of trial results.
- Understanding the specific patient population studied is vital for interpreting drug trial outcomes.
More Related Videos
06:28E-Patient Counseling Trial (E-PACO): Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy
Published on: August 1, 2019
04:11A Video Protocol of a Randomized Controlled Clinical Trial - Electrochemotherapy of Cutaneous Metastases with Reduced Dose Bleomycin (BLESS Trial)
Published on: June 9, 2026
Related Concept Videos
Randomized Experiments
Simple randomization
Simple...
Clinical Trials
There are four phases in a clinical trial. A phase one...
Blinding
Clinical Trials: Overview
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast, controlled...
Bioavailability Study Design: Healthy Subjects Versus Patients