03 · What You Need to Know
Why Ethics Approval Is Designed to Happen Before Research
Prospective Review Can Change the Study Before Participants Are Exposed
The central problem with retrospective approval is temporal. Ethics review is useful partly because a committee can require changes before participants experience the research.
Reviewers may identify an unnecessarily intrusive question, an inappropriate recruitment relationship, excessive data collection, inadequate confidentiality safeguards, unclear consent language, inequitable participant selection, or an avoidable risk. Researchers can then revise the protocol before anyone is affected.
Once data collection is complete, those protections cannot be applied retrospectively to participants who have already taken part.
Later Review and Retrospective Approval Are Not the Same Thing
An REC or IRB may need to examine a completed or partially completed study after discovering that required approval was missing. That does not mean it is retrospectively approving the earlier conduct.
Retrospective assessment
An authorized body examines what happened, determines what requirements applied, evaluates participant impact or noncompliance, and decides what corrective actions are appropriate.
Retrospective approval
A purported approval that attempts to treat previously conducted research as though prospective authorization had existed before it occurred.
The first can be necessary. The second is problematic precisely because prospective review cannot be recreated after the relevant events.
U.S. Human-Research Rules Require Approval Before Covered Research Is Conducted
Under the U.S. HHS human-subject protection framework, OHRP has repeatedly identified conducting nonexempt human-subject research without prior IRB review and approval as noncompliance. Its published compliance determinations state that covered nonexempt human-subject research must receive IRB review and approval before it is conducted.
That framework therefore does not turn later IRB review into prior approval simply because the same protocol might have been approvable had it been submitted on time.
The Philippine Framework Is Also Prospective
The Philippine National Ethical Guidelines for Research Involving Human Participants establish prospective ethical review as part of the governance of human-participant research. Researchers should obtain the ethics determination required for their protocol before implementation rather than using committee review as a post-data-collection certification exercise.
This is particularly important because the REC may determine not only whether a study is ethically acceptable but also whether it is exempt or should undergo expedited or full review. That classification is intended to occur before the covered research proceeds.
“The Committee Would Have Approved It Anyway” Does Not Solve the Problem
Researchers sometimes argue that the study was minimal risk, participants consented, and the protocol was conventional, so approval would almost certainly have been granted.
That may be relevant when an institution assesses the seriousness of what occurred, but it is not equivalent to actual prospective approval. Researchers cannot know with certainty what modifications a committee might have required before approving the study.
A classic COPE case concerning retrospective ethical approval illustrates precisely this problem. The ethics committee chair noted that prospective review allows changes to be recommended before research occurs and that approval of the completed study could not simply be assumed. COPE's discussion concluded that retrospective ethical approval was not an acceptable solution in that case.
Backdating Approval Is Not Retrospective Ethics Review
An approval date should accurately reflect when the ethics body made its decision. Changing documentation to make approval appear earlier than it actually occurred would distort the research record.
The same applies to consent forms, exemption letters, protocol versions, and research dates. Accurate chronology is necessary for research integrity and for determining what activities occurred under which authorization.
Watch Out
Do not ask an ethics committee to backdate an approval letter or alter research dates so that the records appear compliant. A later review can document what is decided now; it cannot truthfully create an approval that did not exist earlier.
A Committee May Approve Future Activities Prospectively
Suppose researchers discover the problem halfway through a longitudinal study. Recruitment and initial data collection have already occurred, but follow-up visits remain.
The ethics body may be able to review a protocol prospectively for activities that have not yet occurred, subject to the applicable rules and institutional response to the earlier noncompliance.
Approval of those future activities should be distinguished clearly from the status of research conducted before approval.
The Committee May Also Determine That Prior Approval Was Not Actually Required
Not every late ethics inquiry ends with a finding that researchers violated a requirement. Sometimes the project was genuinely outside the applicable human-participant research framework or satisfied an exemption for which the institution can document an appropriate determination.
This possibility is particularly relevant when researchers misunderstood the distinction between research that may be exempt and research requiring ordinary committee review.
But an institutional determination that the activity did not require prior approval is conceptually different from granting retrospective approval to research that did require it.
Do Not Call a Later Exemption Determination “Retrospective Approval” Without Clarification
Terminology can become slippery here. An institution might examine an existing project and conclude that, under the applicable rules, it falls outside formal review or satisfies an exemption. That determination explains why full prospective approval was not required.
It should not be confused with approving nonexempt research after it has already been conducted.
When reporting the ethics history, use the terminology actually supplied by the authorized institution and preserve the dates accurately.
Later Participant Consent Does Not Recreate Prospective Ethics Approval
Researchers may wonder whether contacting participants afterward and obtaining consent for use of their information fixes the missing approval.
Later consent can be relevant to what may happen to existing information under some circumstances, but it cannot change what participants experienced before that consent existed. Nor does it recreate independent committee review of the original recruitment, procedures, risks, and consent process.
Consent and ethics approval are related protections, not interchangeable ones.
What Happens to the Data Is a Separate Question
The fact that approval cannot simply be granted retrospectively does not by itself answer whether the previously collected information must be destroyed, can be retained for compliance purposes, may be analyzed, or can eventually be published.
Those questions depend on the applicable regulations, institutional determination, participant consent, risks, data provenance, and publication policies.
The narrower question of whether data collected without required ethics approval can ever be used or published therefore needs to be considered separately.
Journal Acceptance and Ethics Approval Are Different Decisions
An editor may ask for ethics documentation when reviewing a manuscript. Even if a journal were willing to consider a paper after an institutional investigation, that editorial decision would not convert the original research into prospectively approved research.
Conversely, an institution's later decision about data disposition does not guarantee that a journal will accept the manuscript. Journals apply their own editorial and research-integrity policies.
The current ICMJE Recommendations advise authors reporting human research to seek approval from an independent local, regional, or national review body and make clear that editors retain their own responsibility for judging whether the research conduct was appropriate.
Do Not Seek Retrospective Approval as a Planned Strategy
Researchers occasionally ask whether they can collect data now and “get the ethics later if the results are worth publishing.” That is not a legitimate substitute for prospective review.
If you already know the study requires ethics approval, the appropriate sequence is to obtain that approval before collecting the research data.
The possibility that an institution may later investigate or remediate noncompliance should never be built into the research plan as an alternative ethics pathway.
04 · A Practical Example
What a Later Ethics Review Can and Cannot Do
Hypothetical Example
A Researcher Completes 30 Interviews Before Discovering the Requirement
A researcher interviews 30 employees about workplace experiences and later learns that the project should have received prospective REC review. The researcher asks whether the REC can approve the study now so the manuscript can be submitted.
What cannot be recreated
The REC cannot go back and change how the 30 employees were recruited, what they were told, which interview questions they answered, or what confidentiality arrangements existed when participation occurred.
What can happen now
The institution can review the facts, determine what ethics requirements applied, assess risks and participant protections, and identify any noncompliance or corrective actions.
What happens to the interviews
The REC or responsible institutional authority can determine, under its rules, what may happen to the existing recordings, transcripts, and other records.
What happens next
If further interviews or follow-up are proposed, those future activities can be reviewed prospectively before they occur.
What the researcher reports
The chronology remains accurate. The researcher does not describe the original interviews as REC-approved if they were conducted before approval existed.
A later ethics process can therefore be extremely important without functioning as a time machine. Committees are generally more effective at prospective participant protection than temporal engineering.
07 · A Quick Checklist
When You Are Considering Retrospective Ethics Approval
Before taking further action, check:
Confirm whether the research actually required prospective ethics approval or another formal determination under the rules that applied when it began.
Stop ongoing unapproved research activities when required and protect participants from any continuing risks.
Preserve an accurate chronology of recruitment, consent, data collection, approvals, and protocol versions.
Do not backdate approval, consent, exemption, or other research documentation.
Ask the REC, IRB, or institutional research office what process applies to the previously conducted activities.
Separate approval of future activities from the status of activities that already occurred.
Obtain an institutional decision about retention, analysis, or other use of previously collected information rather than deciding privately.
Report the ethics history accurately to journals, funders, collaborators, and other bodies that legitimately require it.
