Clinical trials have transformed modern medicine for more than 275 years, leading to breakthroughs that have improved millions of lives worldwide. Yet despite the progress made in clinical research, one challenge continues to persist across the industry: patient participation.
As we recognize International Clinical Trials Day on May 20th, and this year’s theme, ‘Research Rising’, it is important to reflect not only on how far clinical research has come, but also on the barriers that still prevent many patients from accessing and participating in clinical trials.
At Clariness, we have supported more than 2,500 clinical trials globally and spent over 20 years working directly with patients, sites and sponsors. Throughout this experience, we have seen firsthand how addressing these barriers through patient-centered approaches and strategic partnerships can help research continue to rise.
Why clinical trial participation remains a challenge
Clinical trials are essential for advancing healthcare, developing new medicines and improving treatment options for patients worldwide. However, many studies continue to struggle with patient recruitment and retention.
While participation in clinical research has increased significantly in recent years, misconceptions surrounding clinical trials remain widespread.
Many patients are still unaware that clinical trials may be a treatment option for them. Others may hesitate due to fear, uncertainty or lack of accessible information. Overcoming these barriers is essential not only for improving recruitment, but also for ensuring clinical research becomes more inclusive, diverse and patient-centered. Below we break down four of the biggest barriers to patient participation.
Barrier 1: Lack of trust in clinical research
Trust remains one of the most significant barriers to clinical trial participation. Many individuals worry about becoming “guinea pigs” in experimental studies or fear the unknown aspects of investigational treatments. Others may feel uncertain about how their personal information and health data will be handled throughout the research process. In some cases, mistrust may also stem from previous healthcare experiences or broader misconceptions surrounding the pharmaceutical industry. Building trust requires transparency, communication and patient-focused engagement.
Barrier 2: Lack of awareness about clinical trials
Many patients simply do not know that clinical trials exist or that they may qualify for one. Research has shown that patients place a high level of trust in healthcare professionals, yet discussions about clinical trials are still not consistently integrated into patient care conversations. As a result, many people remain unaware of research opportunities that could potentially improve their treatment options or contribute to medical progress.
Improving awareness is one of the most important steps toward increasing clinical trial participation. Patients need clear and accessible information about:
- what clinical trials are
- how they work
- potential risks and benefits
- eligibility requirements
- participant rights and protections
The way this information is communicated is equally important. Clinical trial materials should be patient-friendly, culturally relevant and adapted to local languages and health literacy levels.
Barrier 3: Accessibility and participation burden
Even when patients are interested in participating in clinical trials, practical barriers can still prevent enrollment. For many individuals, clinical trial participation may involve:
- extensive travel
- frequent site visits
- scheduling challenges
- financial concerns
- additional physical and emotional burdens
These challenges can disproportionately impact patients living in rural areas, individuals with mobility limitations or underrepresented communities with reduced access to healthcare infrastructure.
Barrier 4: Complexity of clinical trial recruitment
Clinical trial recruitment has become increasingly complex as study protocols grow more demanding, eligibility criteria become stricter and sponsors seek highly specific patient populations for precision and targeted therapies.
Today’s clinical trials often require participants to meet detailed genetic, demographic, medical and lifestyle criteria, making it more difficult to identify eligible patients at scale. At the same time, decentralized and hybrid trial models, increased regulatory requirements and rising patient expectations have added further operational complexity for sponsors and research sites.
Recruitment is no longer only about finding suitable participants. Research teams must also ensure patients are well-informed, engaged and supported throughout the entire study journey to improve enrollment, retention and overall trial success.
As clinical research becomes more patient-centric, collaboration across the healthcare and clinical research ecosystem is increasingly essential. Sponsors, research sites, healthcare providers, patient advocacy groups and recruitment partners must work together to improve patient outreach, build trust and create more accessible and inclusive trial experiences.
How Clariness tackles barriers to clinical trial participation
By partnering with trusted, well-known corporations, Clariness has overcome frequent misconceptions to boost patient enrollment and retention. We partner with three main types of organizations:
1. Patient organizations
Patient organizations play a vital role in connecting patients with clinical research through trusted communities and credible medical information. Clariness partners with organizations such as Bundesverband Neurodermitis e.V., LebensHeldin e.V., Deutsche Sauerstoff- und BeatmungsLiga LOT e.V., Blue Ribbon Deutschland, and depressionsliga.de, which promote studies listed on our patient-centric trial platform, ClinLife®.
Because patients already trust these organizations, referrals often lead to higher engagement and conversion rates. We also collaborate with medical magazines (for example: Progress of Clinical Trials) and awareness initiatives to support patient education and strengthen trust in clinical research.
2. MedTech apps
MedTech apps help patients manage their health, access educational resources and stay connected with healthcare professionals. Clariness collaborates with apps such as Mika, Nia and TOM to support patients throughout their treatment journey and improve access to clinical trial information.
These digital platforms provide personalized, accessible and patient-centric experiences while helping us reach and engage broader patient communities through modern healthcare channels.
3. Research experts
Collaboration with research experts helps improve patient education, site training and communication throughout the clinical trial process. Clariness partners with organizations such as Research Experts Alliance and Nextevidence to share expertise and support data-driven clinical research initiatives.
These partnerships strengthen credibility, enhance decentralized patient engagement and help ensure patients receive clear, reliable information about clinical trial participation.
Research rising through patient-centered clinical research
The future of clinical research depends on removing barriers that prevent patients from participating in clinical trials. As research continues to evolve, there is growing recognition that successful clinical trials must be built around the patient experience, prioritizing trust, accessibility, communication and support at every stage of the journey.
International Clinical Trials Day is an opportunity to celebrate the progress clinical research has made over the centuries, while also recognizing the work still needed to improve participation and inclusivity across the industry.
This year’s theme, ‘Research Rising’, reflects the continued commitment of patients, researchers, healthcare professionals and organizations working together to shape the future of medicine.
At Clariness, we’re committed to helping research rise by putting patients at the center of every clinical trial journey.