What Happens at a Clinical Trial Screening Visit?

If you have been identified as a potential candidate for a clinical research study, you may be invited to attend a screening visit.

Whether you learned about the study through your healthcare provider, a research site, a referral, or another recruitment source, the screening process is an important step in determining whether a particular study may be appropriate for you.

But what exactly happens during a clinical trial screening visit?

While every study is different, understanding the general screening process can help you know what to expect.

You will Learn More About the Study

Before study-specific clinical screening procedures are performed, informed consent requirements apply.

The informed consent process is designed to give potential participants information about the research and sufficient opportunity to consider whether participation is right for them.

You should have an opportunity to ask questions.

The research team may discuss topics such as:

The purpose of the study
What participation involves
How long participation may last
Study procedures
Potential risks and discomforts
Potential benefits
Alternative options
Confidentiality and other participant protections

Informed consent is more than simply signing a form. It is a process intended to help you make an informed and voluntary decision about research participation.

What May Happen During Screening?

The exact screening process depends entirely on the clinical trial.

Depending on the study, screening could involve things such as:

Reviewing your medical history
Reviewing medications you’re currently taking
Discussing your diagnosis or symptoms
A physical examination
Vital signs
Blood or urine samples
Other laboratory tests
Questionnaires or assessments
Study-specific procedures or imaging

Not every clinical trial uses all of these procedures.

The protocol determines what is necessary for that particular study.

Why Are There So Many Eligibility Questions?

Every clinical trial has specific inclusion and exclusion criteria.

These requirements help researchers define who can participate in the study.

Criteria can involve factors such as age, diagnosis, medical history, medications, laboratory results, previous treatments, or other study-specific characteristics.

That’s why a person can appear to qualify based on an advertisement or phone conversation but later discover during screening that they don’t meet all of the study requirements.

Does Completing Screening Mean You’re Enrolled?

No.

Screening does not guarantee enrollment.

The purpose of screening is to determine whether a potential participant meets the study’s eligibility requirements.

Results from laboratory testing, medical history, examinations, or other assessments may show that someone isn’t eligible for that particular study.

Not qualifying doesn’t mean that anything is “wrong” with the person. Clinical trials are designed around very specific research questions, and eligibility criteria differ from study to study.