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What is an Informed Consent Form (ICF)?

Posting date: 22/04/2025
Author: Inside ICON
When it comes to clinical trials, one of the most important documents you’ll hear about is the Informed Consent Form (ICF). Whether you're starting out in clinical research or exploring job opportunities in this field, understanding what an ICF is, and how it fits into the broader landscape of clinical operations is essential.

In clinical trials, where new drugs, devices or interventions are tested for safety and effectiveness, the ICF is a vital document that protects both participants and researchers. It’s one of the first and most important touchpoints in the trial journey.

In this blog, we’ll explore what the ICF is, why it matters, and what job seekers or graduates interested in working in clinical research need to know about it.

What is an Informed Consent Form?

An Informed Consent Form (ICF) is a formal document used in clinical trials that ensures participants are fully informed about the study they’re being asked to join. It outlines the purpose, procedures, risks, benefits, and rights of the participant before they agree to take part.

The ICF outlines the purpose of the trial, what participation involves, possible risks and benefits, and the rights of participants, including the right to withdraw at any time. In short, it gives people the information they need to make a voluntary and informed decision.

Participants aren’t simply signing a document; they’re agreeing to contribute to science based on clear, transparent, and understandable information.

Without informed consent, a clinical trial cannot ethically or legally proceed.

How is the ICF used?

The informed consent process begins before a participant joins a clinical trial. Here’s how it usually works in a real-world setting: 

Initial discussion: A research team member (often a Clinical Research Coordinator) explains the study in detail using the ICF as a guide. This is often a face-to-face conversation, giving the participant a chance to ask questions.

Review and reflection: The participant is given time to review the ICF independently, consult with family or a physician, and reflect on their decision.

Signing the form: If they agree to join, the participant signs the ICF — usually along with a witness or site staff member.

Ongoing updates: If anything about the study changes (e.g., new risks are discovered), participants are provided with an updated ICF and asked to re-consent.

ICFs aren’t just “one and done.” They’re living documents that evolve alongside the clinical trial. Keeping versions accurate, current, and properly signed is critical, both ethically and legally.

What does an ICF typically include?

While the format can vary by country, sponsor, or study type, a standard ICF generally includes:

Study purpose – An overview of the trial; what condition or disease it's targeting, why the research is being conducted, and how the results might be used.
Procedures – A breakdown of what participation involves, such as how often the participant will need to attend site visits, what procedures (blood tests, scans, questionnaires) will be done, and how long the study will last.
Risks and side effects – A clear explanation of any known or possible risks, including side effects of study drugs or discomfort from procedures.
Benefits – An honest assessment of whether the participant might benefit medically - though most ICFs also clarify that there may be no direct benefit.
Alternatives – A statement outlining other available treatments or procedures outside of the clinical trial.
Data Privacy & Confidentiality – Information on how the participant’s personal data and health records will be collected, stored, and protected.
Voluntary participation – A reminder that participation is entirely voluntary, and that the participant can leave the study at any time, without penalty or loss of medical care.
Contact information – Details on who to contact with questions, emergencies, or concerns - usually the Principal Investigator or site staff.

Why is the ICF such an important document?

The primary purpose of the ICF is to protect the autonomy and safety of participants. Clinical research often involves investigational products or new procedures, which may carry unknown risks. It’s essential that participants are aware of these risks along with any potential benefits so they can decide whether taking part is right for them. 

Here’s why the ICF is so important:

It ensures transparency: People deserve to know exactly what they’re getting into when they participate in a study — from the number of site visits required to how their data will be used.

It reinforces ethics: Informed consent is a core principle of research ethics and human rights. The ICF ensures participants have the information and freedom to choose.

It satisfies regulatory requirements: Global regulatory bodies like the FDA, EMA, and ICH-GCP require a robust informed consent process to approve and monitor clinical trials.

It builds trust: A well-structured and compassionate informed consent process helps foster trust between researchers and participants -  something that’s critical for participant retention and long-term engagement.

Common Challenges

While the purpose of ICFs is clear, managing them in practice can be complex, especially in global, multi-site trials. Here are a few common challenges professionals in clinical research may face:

Length and language – ICFs can be overly long or filled with medical jargon, which can confuse participants or lead to poor comprehension. Striking a balance between completeness and readability is key.

Version control – As protocols change, so too must the ICF. Ensuring every site is using the correct version and has correctly re-consented existing participants requires strong document management and communication.

Regulatory variation – Every country and sometimes individual ethics committees may have different requirements for ICF content, translations, or formatting. Ensuring global compliance can be a time-consuming process.

Who works with Informed Consent Forms?

ICFs touch nearly every part of the clinical trial team. If you're considering a job in clinical research there's a high chance you'll encounter ICFs in some capacity. Here's how different roles interact with informed consent: 

Clinical Research Coordinators (CRC) CRCs are often the ones who present the ICF to participants, answer questions, and obtain signatures. They also ensure proper documentation is maintained throughout the study.

Clinical Research Associates (CRA) CRAs don’t obtain consent directly, but they monitor the consent process to ensure it complies with GCP, protocol, and regulatory requirements. They check ICF documentation during site visits and audits.

Regulatory Affairs Specialists These professionals are responsible for submitting ICFs for review to ethics committees and Institutional Review Boards (IRBs), ensuring all language and content meet local and international regulatory requirements. 

Clinical Trial Assistant (CTA) CTAs help manage ICF version control, filing, and documentation tracking, especially in larger studies where accuracy and audit readiness are critical.

Career Advice

If you’re exploring jobs in clinical research, understanding the role and significance of ICFs gives you a real advantage. Whether you’re interviewing for a CRA role or applying as a Clinical Trial Assistant, being familiar with informed consent shows:

  • Familiarity with core regulatory principles 
  • Attention to detail and ethics 
  • Knowledge of patient engagement best practices 

Many employers look for candidates who already have a grasp of core clinical trial concepts - the ICF is one of the most fundamental.

Conclusion

The Informed Consent Form might seem like just another part of the paperwork behind clinical trials but in reality, it’s an essential document for transparency, ethics, and trust. For those pursuing careers in clinical research, learning the ins and outs of ICFs is not just a technical requirement, it's a meaningful step toward putting patients first. 

Whether you're considering a CRC role at a clinical site or looking to work as a CRA monitoring global trials, understanding informed consent is key to building a career that contributes to high-quality, patient-centric research.

If you're interested in building a career in clinical research, view our current clinical vacancies today.

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