CONSORT for Abstracts Applied to Conference Abstracts: An Item-by-Item Guide Before You Submit a Poster Abstract

CONSORT for Abstracts is a reporting checklist that sets out the minimum information an abstract of a randomised trial should contain [1]. The main CONSORT statement governs the full trial report. The abstract extension, published in 2008, adapts it to the few hundred words of an abstract so that a reader can judge the design and findings without the full paper. It lists 17 items across the title, authors, methods, results and conclusions, plus trial registration and a funding statement [1].

The CONSORT extension for abstracts was written for journal and conference abstracts alike, and one item, the corresponding author’s contact details, applies to conference abstracts only [1]. It is still current: the CONSORT 2025 statement, which replaced CONSORT 2010 for full reports, keeps a structured summary as item 1b and lists the 2008 abstracts extension among its extensions [2]. We found no updated abstracts checklist when we checked in October 2026.

A conference abstract may be the only permanent record of a trial. Studies reviewed by the CONSORT group found that only about half of randomised trials presented at conferences are later published in full [1]. The same work found frequent gaps: in one sample, only 26% of conference abstracts reported both the size of the effect and its statistical significance, and most trial abstracts reported no harms [1].

A poster abstract read at a glance can mislead if it reports a favourable result without the effect size, the denominator or the trial registration. Running the CONSORT abstract guidelines as a conference abstract checklist protects readers, and it pre-empts the most predictable reviewer questions.

Work through the items in the order they appear in the abstract. In the title, state that the study is a randomised trial. In the methods, give the trial design, the eligibility criteria and setting, the interventions for each group, the objective, the clearly defined primary outcome, how participants were allocated, and who was blinded. In the results, report the numbers randomised and analysed in each group, which is the essence of participant flow. For the primary outcome, give a result for each group with the estimated effect size and its precision, usually a 95% confidence interval, and report important harms. The conclusion gives a general interpretation that weighs benefits against harms [1]. Each item needs only a short clause.

Four items need special care in a poster abstract. The corresponding author’s contact details are required for conference abstracts only, because there may be no full paper to trace [1]. Recruitment status (ongoing, closed or stopped early) matters because conference abstracts are more likely than full papers to report interim analyses [1]. Trial registration, with the register name and number, lets readers find the protocol and check for selective reporting. A funding statement naming the source belongs in the abstract itself, not only on the poster [1]. These are the items most often cut for space, so add them first and trim elsewhere.

The fixes are usually a few words. If the title does not say “randomised”, add it. If the primary outcome is implied, name it and report it for both groups with an effect size and confidence interval, not a p value alone. Replace “significantly improved” with the actual numbers, and state how many were randomised and analysed so the denominators are explicit. Insert the trial registration number and the funding statement even if something less essential has to go. Writing within a structured abstract labelled background, methods, results and conclusions makes each required item easy to find and easy for a reviewer to tick off [3].

* Conference abstracts only. Use the table as a final pass: if any row has no matching clause in your draft, the abstract is not yet complete. For guidance on turning the accepted abstract into a poster, see our step-by-step research poster guide.

Treated as a pre-submission routine, CONSORT for Abstracts turns complete trial reporting into a finite list of 17 items, each covered in a single clause. Draft the abstract in a structured format, run it against Table 1, and repair every missing item, starting with the primary outcome, the effect size, participant flow, the trial registration and the funding statement. Do that before you submit, and your conference or poster abstract reports the trial completely and honestly.