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Is your lay summary readable before it's due?

A checklist that follows the Annex V headings and Good Lay Summary Practice, a deadline card, a synthetic before and after, and a review-hours worksheet. All of it is on this page.

Last reviewed 2026-10-09

A review aid, not regulatory advice.

Every EU trial now needs one

Since 2025-01-31, all trials in the EU and EEA run under the Clinical Trials Regulation. Each one must post a summary of its results written for the public, in the languages its trial countries require. The summary has to be accurate and easy to read. Most teams write it at the end, under a deadline, after the scientific report.

Deadline card

Count from the end of the trial in all countries. Check each trial's own timeline with your regulatory team.

Months from the end of the trial

  • Paediatric trials

    6 months

  • Most trials

    12 months

  • Non-therapeutic phase 1 trials

    30 months

Bars drawn to scale from the deadline card below.
When the lay summary is due under the CTR
Trial typeDue after the end of the trial
Most trialsWithin 12 months
Paediatric trialsWithin 6 months
Non-therapeutic phase 1 trialsWithin 30 months

A results paragraph, before and after

One paragraph from a synthetic summary. The numbers in the notes match the changes. Brackets mark what your team fills in.

Synthetic example: Overall results. Not a member or patient document.

Before

The primary efficacy endpoint was met, with a statistically significant reduction in the mean change from baseline in the symptom severity score at week 12 in the treatment arm relative to placebo (p<0.001). The incidence of treatment-emergent adverse events was comparable between arms.

After

What did the study find?

After 12 weeks, people who took [study medicine] had fewer symptoms than people who took a placebo. A placebo looks like a medicine but has no medicine in it.

About the same number of people in each group had side effects. You can find the list of side effects in section [number].

This is the result of one study. It may not be the same for everyone. Talk to your doctor before you make any change to your treatment.

Words per sentence, before and after

Before

43 words in 2 sentences · longest 33 words

After

84 words in 8 sentences · longest 17 words

Each bar is one sentence or line of the synthetic example above, drawn to the same scale. The plain version says the same thing in shorter pieces, each with one job.

What changed and why

  1. The heading asks the reader's question.
  2. "Primary efficacy endpoint" and "p<0.001" become what changed for the people in the study.
  3. Placebo is explained the first time it appears.
  4. Side effects get their own pointer instead of "treatment-emergent adverse events".
  5. A closing line keeps the result in context and points to the doctor.

Review-hours worksheet

Lay summaries go through several review rounds, in each language. Add up your hours to see where the time goes. The first row is an example.

The example row

4 languages × 3 review rounds × 6 hours per round = 72 total hours. Each extra language adds a row of rounds, so the hours grow with every language you add.

Review hours: one row per trial
TrialLanguagesReview roundsHours per roundTotal hours
Trial [number] (example)43672
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Type in the table, then download it for Excel or Google Sheets. Your entries stay in this tab: nothing is sent or saved, so download before you leave the page.

The lay-summary checklist

Check each draft against the parts the CTR asks for, then against the reading checks.

Complete this checklist: about 15 minutes

0 of 14 checked

The summary covers (CTR Annex V)

  1. Source: Regulation (EU) No 536/2014 on clinical trials, Article 37 and Annex V

  2. Source: Regulation (EU) No 536/2014 on clinical trials, Article 37 and Annex V

  3. Source: Regulation (EU) No 536/2014 on clinical trials, Article 37 and Annex V

  4. Source: Regulation (EU) No 536/2014 on clinical trials, Article 37 and Annex V

Written for the public (Good Lay Summary Practice)

  1. Source: European Commission, EudraLex Volume 10: Good Lay Summary Practice

  2. Source: European Commission, EudraLex Volume 10: Good Lay Summary Practice

  3. Source: European Commission, EudraLex Volume 10: Good Lay Summary Practice

  4. Source: European Commission, EudraLex Volume 10: Good Lay Summary Practice

Your answers stay in this tab: nothing is sent or saved. Download or print before you leave the page.

Sources

After the kit

Compose an email

Send a blank template, not a copy with a patient's or member's details.

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Questions

Will regulators accept a summary that passes this checklist?

We can't promise that. It is a review aid. Your scientific experts and regulatory team decide what is posted.

Which languages does it cover?

We measure English and Spanish, each with its own reading tests. Other languages are scoped one by one.