BMJ Open Cover Letter: What Editors Actually Need to See
BMJ Open uses open peer review and mandatory reporting checklists. Missing a checklist is the single most common trigger for desk rejection, and it is entirely preventable.
Senior Researcher, Oncology & Cell Biology
Author context
Specializes in manuscript preparation and peer review strategy for oncology and cell biology, with deep experience evaluating submissions to Nature Medicine, JCO, Cancer Cell, and Cell-family journals.
Readiness scan
Before you submit to BMJ Open, pressure-test the manuscript.
Run the Free Readiness Scan to catch the issues most likely to stop the paper before peer review.
How to use this page well
These pages work best when they behave like tools, not essays. Use the quick structure first, then apply it to the exact journal and manuscript situation.
Question | What to do |
|---|---|
Use this page for | Getting the structure, tone, and decision logic right before you send anything out. |
Most important move | Make the reviewer-facing or editor-facing ask obvious early rather than burying it in prose. |
Common mistake | Turning a practical page into a long explanation instead of a working template or checklist. |
Next step | Use the page as a tool, then adjust it to the exact manuscript and journal situation. |
Quick answer: a strong BMJ Open cover letter confirms the reporting checklist is complete, states the finding with specific numbers, and addresses patient and public involvement. Missing checklists are the single most common cause of desk rejection, and it is entirely preventable.
What the official sources do and do not tell you
The BMJ Open author guidelines explain the open peer review model, reporting checklist requirements, and article types. They clearly state the checklist requirement but do not emphasize that roughly 50% of submissions are desk-rejected, most commonly for missing or incomplete checklists.
What the editorial model implies:
- the journal evaluates methodological soundness, not novelty
- open peer review means reviewer names and full comments are published with accepted papers — editors know their decisions will be public
- mandatory reporting checklists (CONSORT, STROBE, PRISMA, COREQ, etc.) must be uploaded with page numbers filled in at submission
- patient and public involvement (PPI) statements are expected in every manuscript
What the editor is really screening for
At triage, the editor is checking:
- is the reporting checklist complete, with page numbers for every item?
- is the study design appropriate for the research question?
- are ethics approval and informed consent documented?
- is there a data availability statement?
- is there a PPI statement (involvement described or absence explained)?
- is the scope medical, clinical, or health-related?
About 50% of submissions are desk-rejected. The most common reason is a missing form, not bad science.
What a strong BMJ Open cover letter should actually do
A strong letter usually does five things:
- states the primary finding or objective with specific numbers
- names the reporting checklist used and confirms it is uploaded with page references
- notes ethics approval with committee name and reference number
- addresses patient and public involvement (one sentence)
- confirms data availability
A practical template you can adapt
Dear BMJ Open Editors,
We submit "[TITLE]" for consideration as a [Research Article /
Study Protocol / Systematic Review] in BMJ Open.
[1–2 sentences: primary finding with specific numbers. For
protocols: describe the trial design and registration number.]
[1–2 sentences: methodological soundness. Sample size, power
calculation, reporting standard used.]
We report per [STROBE / CONSORT / PRISMA / COREQ] guidelines.
The completed checklist with page references is uploaded with
this submission.
[1 sentence: PPI statement. "Patient representatives contributed
to outcome selection" or "This secondary analysis did not involve
patient or public contributors in the design."]
[1–2 sentences: ethics and data. Ethics committee name, reference
number, consent confirmation, data repository.]
All authors have approved the manuscript. It is not under
consideration elsewhere. We have no competing interests.
[If transferred from another BMJ journal: "This manuscript was
previously submitted to [journal] under manuscript number
[number]."]
Sincerely,
[Name, Degree, Affiliation, ORCID]Mistakes that make these letters weak
The common failures are:
- submitting without a reporting checklist (the top desk-rejection trigger)
- arguing for novelty instead of soundness (BMJ Open does not evaluate impact)
- ignoring the PPI requirement
- recycling a cover letter written for BMJ (different journal, different standards)
- omitting the data availability plan
- not disclosing a transfer from another BMJ journal when the editors can check
What should drive the submission decision instead
Before polishing the letter further, confirm the journal fit is honest.
The better next reads are:
- BMJ Open acceptance rate
- BMJ Open review time
- BMJ Open APC and open access
- BMJ Open submission guide
The median time to first decision is 134 days, notably longer than PLOS ONE or Scientific Reports. Plan accordingly. If you need a fast turnaround, BMJ Open may not be the right choice.
Practical verdict
The strongest BMJ Open cover letters are compliance documents, not persuasion essays. They confirm the checklist is done, the ethics are in order, and the methods are sound. The open peer review model means everything is eventually public — write accordingly.
A free Manusights scan can help catch reporting gaps and missing checklist items before the 134-day review cycle begins.
Sources
- 1. BMJ Open author guidelines, BMJ Publishing Group.
- 2. BMJ Open peer review policy, BMJ Publishing Group.
- 3. EQUATOR Network reporting guidelines.
- 4. Clarivate Journal Citation Reports, 2025 release.
Reference library
Use the core publishing datasets alongside this guide
This article answers one part of the publishing decision. The reference library covers the recurring questions that usually come next: how selective journals are, how long review takes, and what the submission requirements look like across journals.
Dataset / reference guide
Peer Review Timelines by Journal
Reference-grade journal timeline data that authors, labs, and writing centers can cite when discussing realistic review timing.
Dataset / benchmark
Biomedical Journal Acceptance Rates
A field-organized acceptance-rate guide that works as a neutral benchmark when authors are deciding how selective to target.
Reference table
Journal Submission Specs
A high-utility submission table covering word limits, figure caps, reference limits, and formatting expectations.
Final step
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Where to go next
Start here
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Supporting reads
Conversion step
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