Related Experiment Video
Updated: Jun 13, 2026

Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
Published on: August 30, 2018
Patients included in randomised controlled trials do not represent those seen in clinical practice: focus on
Matthew E Falagas1, Evridiki K Vouloumanou, Konstantinos Sgouros
1Alfa Institute of Biomedical Sciences (AIBS), 9 Neapoleos Street, 151 23 Marousi, Athens, Greece. m.falagas@aibs.gr
Abstract:
Clinicians rely on the findings of randomised controlled trials (RCTs) to formulate clinical decisions regarding individual patients. We examined whether patients included in RCTs focusing on antimicrobial agents are representative of those encountered in real-life clinical situations. PubMed was searched for RCTs referring to the field of infectious diseases. Data regarding the exclusion criteria of the identified RCTs were extracted and critically evaluated. In total, 30 trials (17 referring to respiratory tract, 5 to skin and soft-tissue, 4 to intra-abdominal, 2 to gynaecological and 2 to bloodstream infections) were included in the study. All retrieved RCTs reported extensive exclusion criteria. After comparing in a qualitative manner (based on our clinical experience) the eligible patient population in the identified RCTs with the respective population that would be encountered in general practice, it was observed that the abovementioned patient populations differ considerably. In conclusion, RCTs in the field of infectious diseases use extensive and stringent exclusion criteria, a fact that may lead to considerable difference between the patient populations of RCTs and those viewed in clinical practice. The application of the findings of RCTs to the care of individual patients should be performed cautiously.
Insights
Randomised controlled trials (RCTs) for infectious diseases often exclude many patients seen in clinical practice due to strict criteria. This limits the generalizability of RCT findings to real-world patient care.
Area of Science:
- Infectious Diseases
- Clinical Trials
- Evidence-Based Medicine
Background:
- Clinicians depend on randomised controlled trials (RCTs) for treatment decisions.
- The representativeness of RCT participants compared to general patient populations is crucial for evidence-based practice.
Purpose of the Study:
- To assess if patients in antimicrobial agent RCTs reflect those in real-life clinical settings.
- To evaluate the exclusion criteria used in infectious disease RCTs.
Main Methods:
- A PubMed search identified RCTs in infectious diseases.
- Exclusion criteria from 30 selected RCTs were extracted and analyzed.
- Qualitative comparison of RCT-eligible patients versus general practice patients was performed.
Main Results:
- Thirty RCTs (respiratory, skin, abdominal, gynaecological, bloodstream infections) were included.
- All identified RCTs utilized extensive exclusion criteria.
- Significant differences were observed between RCT populations and general clinical practice populations.
Conclusions:
- Infectious disease RCTs frequently employ stringent exclusion criteria.
- These criteria can create a substantial divergence between trial participants and patients in clinical practice.
- Caution is advised when applying RCT findings to individual patient care.
Related Concept Videos
Clinical Trials
There are four phases in a clinical trial. A phase one...
Antimicrobial Effectiveness
Clinical Trials: Overview
Clinical Significance of Antibiotic Resistance
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...
Blinding