How to read a ClinicalTrials.gov listing without getting lost

A ClinicalTrials.gov listing can run to several pages, written in language meant for regulators and researchers. Most of it you can skim. A handful of fields do almost all the work in telling you whether a trial is worth a conversation with your care team — and knowing which ones saves a lot of time and frustration.

Start with the recruitment status

Near the top you'll see a status. Recruiting means the study is currently enrolling participants. Not yet recruiting means it has been registered but isn't enrolling yet. Active, not recruiting means people are already in the study and no new participants are being accepted. Completed, Terminated, and Withdrawn mean it's no longer an option.

If you're looking for something you could join now, "Recruiting" is the one to look for. Statuses can lag behind reality, which is why it's always worth confirming with the study team directly.

Check the phase

The phase tells you what question the study is trying to answer — early safety, early effectiveness, or comparison with the current standard of care. We cover this in detail in What clinical trial phases actually mean, but the short version is that the phase helps you ask better questions rather than ranking trials from "better" to "worse."

Read the eligibility section closely

This is the most important part, and the part most people skim. Eligibility is split into two lists:

• Inclusion criteria — what you generally need to have to be considered, such as a specific cancer type or stage, a particular biomarker, or a certain number of prior treatments.
• Exclusion criteria — things that would rule you out, such as certain other health conditions, recent treatments, or medications.

Don't be discouraged if some terms are unfamiliar. Bring the list to your oncologist and ask which items apply to you. Criteria that look like dealbreakers sometimes have exceptions, and others turn out to be simpler than they sound.

Look at what the study is actually testing

The interventions section lists what participants receive. The study design section tells you whether people are randomly assigned to groups and whether the study is blinded. If one group receives a placebo or standard treatment, the listing will usually say so — and it's worth asking exactly what that means for you.

Find the locations and contacts

Scroll to the locations section to see which sites are enrolling and who to contact. Many listings include a phone number or email for a study coordinator. That's a good first stop: coordinators answer questions like this every day, and they can tell you quickly whether you're likely to qualify.

Keep the NCT number

Every registered study has an identifier that starts with "NCT." Write it down and share it with your care team — it's the fastest way to make sure everyone is talking about the same trial.

Where ClinicalMatch fits

ClinicalMatch pulls from ClinicalTrials.gov, so the listings you see in our trial search use the same underlying records, presented in plainer language and filterable by condition and distance. Either way, the final word on whether a trial is right for you belongs to you, your care team, and the study team.