How to check a randomized controlled trial manuscript against the CONSORT 2010 statement — the 25-item reporting guideline endorsed by most major medical journals — and the items authors and reviewers most often miss.
Updated June 2026 · Educational resource — not a substitute for professional review
What CONSORT is — and isn't
CONSORT is a reporting guideline. It tells you whether a manuscript describes the trial completely enough to be appraised — not whether the trial itself was well designed. A trial can be CONSORT-compliant and still be at high risk of bias; conversely, a strong trial can be reported so poorly that a reader can't tell. Use CONSORT to find what's missing or ambiguous, then judge the methods on their merits.
Title & abstract
Is the study identified as randomized in the title?
Does the abstract give a structured summary of design, methods, results, and conclusions (CONSORT for Abstracts)?
Introduction & methods
Background, rationale, and specific objectives/hypotheses stated.
Trial design (allocation ratio, framework) and any changes after commencement, with reasons.
Eligibility criteria and settings/locations.
Interventions for each group in enough detail to replicate.
Pre-specified primary and secondary outcomes, with how and when assessed, plus any changes after the trial began.
Sample-size determination, and any interim analyses/stopping guidelines.
Randomization (the items most often conflated)
Sequence generation: method used to generate the random allocation, plus any restriction (blocking, stratification).
Allocation concealment: the mechanism used to implement the sequence, and whether it was concealed until assignment — a separate item from generation.
Implementation: who generated the sequence, enrolled participants, and assigned them.
Blinding: who was blinded (participants, providers, outcome assessors) and how.
Results
Participant flow diagram with numbers randomized, receiving intended treatment, and analyzed for the primary outcome — with losses and exclusions and reasons at each stage.
Dates defining recruitment and follow-up periods.
Baseline demographic and clinical characteristics per group.
Numbers analyzed per group, and whether by original assigned groups (ITT).
For each outcome: results per group, the effect size and its precision (95% CI) — not p-values alone.
Ancillary analyses flagged as pre-specified vs. exploratory; all important harms.
Discussion & other information
Limitations (sources of potential bias, imprecision, multiplicity), generalizability, and interpretation consistent with results.
Trial registration number, where the protocol can be accessed, and funding/role of funders.
PUT THIS INTO PRACTICE
TrialScope runs the checks below automatically — findings, severities, and a clear verdict in under 90 seconds, calibrated to your professional role and sharpened by corrections from verified clinical professionals.
Frequently asked questions
What is the CONSORT statement?
CONSORT (Consolidated Standards of Reporting Trials) is an evidence-based reporting guideline for randomized controlled trials. The CONSORT 2010 statement is a 25-item checklist plus a participant flow diagram, designed to ensure a trial report is complete and transparent enough to be critically appraised and reproduced.
Is CONSORT mandatory?
CONSORT is not a regulatory requirement, but most leading medical journals require or strongly recommend CONSORT-compliant reporting (and a completed checklist) as a condition of publishing a randomized trial. It governs how a trial is reported, not how it is designed or conducted.
What are the most commonly missed CONSORT items?
Frequently under-reported items include allocation concealment (often confused with sequence generation), how blinding was implemented and assessed, the full participant flow with reasons for exclusion at each stage, pre-specification of primary vs. secondary outcomes, exact effect sizes with confidence intervals, and trial registration.