In plain language

A study protocol is a public description of what researchers intend to test. It tells readers why the question matters, who may be enrolled, how treatment will be delivered and what will be measured. A well-specified protocol is valuable even before results exist.

Why the distinction matters

The PRaG literature contains completed cohort reports, individual cases, meeting abstracts and protocols. Their titles can all sound promising. However, a planned objective response rate endpoint is not an observed response rate, and a planned enrollment of 60 is not evidence that 60 people benefited.

For example, the PRaG 5.0 protocol explores thymalfasin regulation, while PRaG 2.0E proposes adding an anti-angiogenic agent to a combination that includes IL-2. These address different questions; the version numbers are labels, not a ranking of effectiveness.

Follow the study, not just the paper

One clinical trial can generate a registration, a protocol, several meeting abstracts and a final article. Read them as related records. Counting them as separate trials would inflate the apparent amount of evidence.

The PRaG 2.0 ASCO report and its NCT04892498 registry entry are linked in this resource. A meeting abstract provides findings but often less methodological detail than a full article.

A simple reading checklist

  1. Is this a plan, an individual observation or a completed cohort analysis?
  2. Which population and treatment combination does it describe?
  3. Are the numbers planned, enrolled, evaluable or analyzed?
  4. Was there a control group, and how was treatment assigned?
  5. Is the source recent, or has a later report updated the same study?

Registry recruitment labels also require context. A record that has not been updated for years does not confirm whether the study currently accepts participants.

Sources and related publications