Related Experiment Video
Updated: Jul 26, 2025
06:05
The Participant-Reported Implementation Update and Score PRIUS: A Novel Method for Capturing Implementation-Related Data Over Time
Published on: February 19, 2021
1.3K
Underreporting contextual factors preclude the applicability appraisal in primary care randomized controlled trials
Aristea Missiou1, Eleni Ntalaouti1, Christos Lionis2
1Research Unit for General Medicine and Primary Health Care, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina, Greece.
Journal of Clinical Epidemiology
|June 13, 2023
Summary
Reporting of contextual factors in primary care randomized controlled trials (RCTs) is critically low. This underreporting jeopardizes the appraisal of applicability for these important health studies.
Area of Science:
- Health Services Research
- Clinical Trials Methodology
- Primary Care Research
Background:
- Randomized controlled trials (RCTs) in primary care (PC) are essential for evidence-based practice.
- Assessing the applicability of PC RCT findings to real-world settings is crucial for effective implementation.
- Current reporting standards may not adequately capture elements vital for applicability assessment.
Purpose of the Study:
- To evaluate the extent and quality of applicability reporting in primary care RCTs.
- To identify specific elements of applicability that are frequently underreported in PC RCTs.
- To inform improvements in reporting guidelines for PC trial publications.
Main Methods:
- A random sample of primary care RCTs published between 2000 and 2020 was analyzed.
- Data extraction focused on setting, population, intervention (including implementation), comparator, outcomes, and context.
- The adequacy of reporting for five predefined applicability questions was assessed based on extracted data.
Main Results:
- Key elements like intervention provision, population characteristics, and implementation details were frequently reported (>50%).
- Contextual factors, such as differential effects across groups, tailored interventions, and health system structure, were significantly underreported (<40%).
- The proportion of trials adequately addressing each applicability question ranged from 1% to 20.2%, with none addressing all questions.
Conclusions:
- Underreporting of contextual factors in primary care RCTs significantly hinders the appraisal of their applicability.
- Improved reporting of contextual elements is necessary to enhance the generalizability and utility of primary care research findings.
- Recommendations for enhancing reporting guidelines for PC RCTs are warranted to improve applicability assessment.
Related Concept Videos
01:29Bias in Epidemiological Studies
380
Biases can arise at various stages of research, from study design and data collection to analysis and interpretation. Recognizing and addressing these biases is essential to ensure the validity and reliability of epidemiological findings.Broadly speaking, biases in epidemiology fall into three main categories: selection bias, information bias, and confounding. A more detailed description of possible biases is:
380
01:23Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches
148
Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
148
01:11Blinding
2.5K
Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.
2.5K
01:27Confounding in Epidemiological Studies
198
Confounding in statistical epidemiology represents a pivotal challenge, referring to the distortion in the perceived relationship between an exposure and an outcome due to the presence of a third variable, known as a confounder. This variable is associated with both the exposure and the outcome but is not a direct link in their causal chain. Its presence can lead to erroneous interpretations of the exposure's effect, either exaggerating or underestimating the true association. This...
198
01:20Study Designs in Epidemiology
288
Epidemiological study designs are fundamental tools for investigating the distribution, determinants, and control of health conditions in populations. They help researchers understand the relationships between exposures and outcomes, and they broadly fall into two categories: "observational" and "experimental" studies.
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and...
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and...
288
01:52Regression Toward the Mean
6.3K
Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when...
6.3K