Ethical Review of International Research

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-08-28

Quick Answer

• Multi-IRB approval requires early identification of all reviewing bodies, a harmonized protocol, and a lead IRB strategy to reduce redundant review.
• Cultural expectations shape consent processes and community engagement, so researchers must adapt materials without weakening ethical standards.
• No single global ethics standard exists, and local regulations always take precedence over any harmonization effort.

Understanding the Multi-IRB Approval Landscape

International research projects routinely require ethical approval from more than one institutional review board. A study based at a US university that collects data in Kenya, Brazil, or India typically needs approval from the US home institution and from each local ethics committee where the research occurs. Each board operates under its own regulations, cultural norms, and institutional priorities. The result is a complex approval pathway that can delay research for months if not managed deliberately.

The National Library of Medicine hosts a collection of research methods resources that describe the ethical foundations of human-subjects research. These resources frame the core obligations that every IRB expects to see addressed, including informed consent, risk minimization, and privacy protection. While the specific forms and procedures differ across countries, the underlying ethical commitments remain consistent. Researchers who understand these shared foundations can build protocols that satisfy multiple reviewers at once.

The Committee on Publication Ethics Core Practices document outlines expectations for research integrity that extend beyond the approval stage. Authorship, data management, and conflict-of-interest disclosure all matter to IRBs because these practices affect whether the research can be conducted and reported honestly. A protocol that anticipates these publication-ethics requirements is easier to defend before an IRB.

Core Principles for International Ethics Review

Respect for Persons and Local Autonomy

The principle of respect for persons requires that individuals participate in research voluntarily and with adequate information. In international settings, this principle takes on additional dimensions. Communities may have collective decision-making traditions that differ from the individual consent model common in the United States. Some cultures expect community leaders to grant permission before individual participants are approached.

A researcher must determine whether local IRBs expect community-level engagement as a precondition for individual consent. This determination comes from consulting the local ethics committee early and from reviewing published guidance from the host country. The protocol should describe how community engagement will occur and how individual consent will still be obtained from each participant.

Risk and Benefit Assessment Across Settings

IRBs evaluate whether the risks of research are reasonable in relation to the anticipated benefits. International research complicates this calculation because the same procedure may carry different risks in different settings. A blood draw that is routine in a well-equipped US clinic may be riskier in a rural facility with limited cold storage and less trained staff.

The protocol must describe the actual conditions at each research site. The researcher should document the facilities, staff qualifications, and emergency procedures available at each location. This information allows each IRB to assess whether the research can be conducted safely in that specific context.

Fair Subject Selection

Fair subject selection requires that researchers do not target vulnerable populations simply because they are convenient or less able to refuse. International research has a history of exploitation, and IRBs are alert to studies that shift burdens to low-income communities while benefits flow to wealthier institutions. The protocol should explain why the selected population is appropriate for the research question and what benefits will be available to the community.

The Multi-IRB Approval Workflow

Step 1: Identify All Reviewing Bodies

Before preparing any submission, list every institution that will require ethical approval. This includes the home institution, each foreign research site, and any collaborating organizations that will handle identifiable data. Some countries have national ethics committees that must approve research before local committees review it. Others delegate all authority to local committees. The researcher must verify the requirements for each country involved.

The National Institutes of Health Grants and Funding portal provides guidance on the expectations for research conducted under NIH awards. NIH expects that all research involving human subjects will be reviewed and approved by an appropriate IRB before the research begins. For international projects, this means the NIH-funded institution must confirm that the foreign sites have their own ethical review or that the US IRB will take responsibility for oversight.

Step 2: Determine the Lead IRB

Many international projects use a lead IRB model. The lead IRB conducts a full review of the protocol and the other committees rely on that review while adding their own local considerations. This model reduces duplication and speeds the approval process. The lead IRB is usually the home institution of the principal investigator, but it can be any committee with the capacity to conduct a thorough review.

The lead IRB arrangement must be documented in writing. Each participating committee must agree to the arrangement and must specify what additional information it needs. Some committees will accept the lead IRB decision without further review. Others will require a local review of the consent process and the cultural appropriateness of the recruitment plan.

Step 3: Harmonize the Protocol

A single protocol document should be prepared for all committees. This protocol should include the research question, the methods, the participant population, the recruitment plan, the consent process, the data management plan, and the risk mitigation strategies. The protocol should be written in plain language so that reviewers from different backgrounds can understand it.

The EQUATOR Network provides reporting guidelines that help researchers describe their methods transparently. While these guidelines are primarily for reporting results, they also help researchers think through the details of their study design. A protocol that follows established reporting standards is easier for IRBs to evaluate because the reviewers can see exactly what the research will do.

Step 4: Prepare Site-Specific Addenda

Each local IRB will need information about the research as it will be conducted at that site. This includes the local investigator, the local facilities, the local recruitment plan, and the local consent process. The researcher should prepare a site-specific addendum for each location. The addendum should be brief and should reference the main protocol instead of repeating it.

The site-specific addendum should also address local language requirements. Consent forms must be translated into the local language and back-translated to verify accuracy. The addendum should describe who will obtain consent and how they will be trained.

Step 5: Submit and Track Approvals

Each IRB has its own submission process and timeline. The researcher should create a tracking table that lists each committee, the submission date, the expected review date, and the status of the application. This table should be updated weekly and should be shared with the research team.

The researcher should expect that some committees will request revisions. These requests may be substantive, such as a change to the consent process, or they may be administrative, such as a change to the format of the submission. The researcher should respond to each request promptly and should document the response.

At a Glance

Strategies for Harmonizing Protocols

Use a Common Protocol Template

A single protocol template that meets the requirements of most IRBs reduces the work of preparing multiple submissions. The template should include all the sections that IRBs typically require: background, objectives, design, population, recruitment, consent, data collection, data management, risks, benefits, and confidentiality. The researcher should prepare the template once and then adapt it for each committee.

The National Library of Medicine research methods resources include guidance on study design and protocol development. These resources help researchers think through the details of their study before they submit to an IRB. A well-designed study is easier to review and more likely to be approved.

Address Cultural Concerns in the Protocol

Cultural concerns often arise in the consent process, the recruitment strategy, and the data collection methods. The protocol should address these concerns directly. For example, if the research involves women in a community where women do not typically make independent decisions, the protocol should explain how consent will be obtained in a way that respects both the individual and the community.

The protocol should also address the cultural appropriateness of the data collection methods. A survey that works in the United States may not work in a community with low literacy or different communication norms. The protocol should describe how the data collection instruments will be adapted and validated for each setting.

Use a Single Data Management Plan

The NIH Data Management and Sharing Policy requires researchers to plan for the management and sharing of data generated with NIH funding. For international research, the data management plan must address the legal and ethical requirements of each country where data will be collected. Some countries restrict the transfer of personal data across borders. The plan must describe how the data will be stored, who will have access, and how the data will be shared.

The data management plan should be included in the protocol so that each IRB can review it. The plan should describe the data security measures, the retention schedule, and the de-identification procedures. The plan should also describe how the data will be shared with the broader research community, consistent with the NIH policy.

Records and Measurements

What to Track

The researcher should maintain a complete record of all ethics submissions and approvals. This record should include the protocol version, the submission date, the review outcome, and the approval date for each committee. The record should also include any correspondence with the committees and any revisions made to the protocol.

The researcher should also track the status of the research at each site. This includes the number of participants enrolled, the number of consent forms signed, and any adverse events reported. This information is needed for the continuing review that most IRBs require.

How to Measure Progress

The researcher should measure the time from the first submission to the final approval for each committee. This measurement helps the researcher identify committees that are slow or that require multiple rounds of revision. The researcher should also measure the number of revisions requested by each committee. This measurement helps the researcher identify the sections of the protocol that are most likely to be questioned.

The researcher should review these measurements after each project to identify patterns. If a particular committee consistently requests changes to the consent process, the researcher should prepare a more detailed consent section in future submissions.

Common Failure Patterns

Submitting the Same Protocol to Every Committee

A common failure is submitting the identical protocol to every committee without adapting it to the local context. Each committee needs to see how the research will be conducted at its site. A protocol that describes only the US site will not satisfy a committee in another country. The researcher must prepare site-specific addenda that address the local conditions.

Ignoring Local Cultural Expectations

Another failure is ignoring the cultural expectations of the host community. The researcher may assume that the consent process that works in the United States will work everywhere. This assumption can lead to rejection or to research that is conducted without genuine consent. The researcher must learn about the local culture and adapt the consent process accordingly.

Underestimating the Time Required

The researcher may underestimate the time required for ethics approval. International approvals can take several months, and the researcher should plan for this. The researcher should begin the ethics approval process as soon as the study design is finalized and should not wait until the funding is secured.

Failing to Track Approvals

The researcher may fail to track the status of each approval and may miss a deadline or fail to respond to a request for revision. The researcher should use a tracking system and should assign responsibility for each submission to a specific person.

Welfare and Safety Context

The welfare of research participants is the primary concern of every IRB. The researcher must design the study to minimize risk and to protect the participants from harm. This includes physical risks, psychological risks, and social risks. The researcher must also protect the privacy of the participants and the confidentiality of their data.

The researcher must also consider the welfare of the research staff. The staff may be exposed to risks during data collection, and the researcher must provide appropriate training and support. The researcher must also ensure that the staff are not placed in positions where they are pressured to conduct research in an unethical manner.

The researcher must also consider the welfare of the community. The research should not disrupt the community or place a burden on the community. The researcher should engage with the community and should ensure that the community benefits from the research.

Limitations and Escalation Criteria

Limitations of the Harmonized Approach

The harmonized approach does not guarantee that all committees will approve the protocol. Some committees may have requirements that cannot be met by a single protocol. The researcher must be prepared to make changes to the protocol to satisfy the requirements of each committee.

The harmonized approach also does not guarantee that the research will be conducted ethically. The researcher must continue to monitor the research and to address any ethical issues that arise. The researcher must also be prepared to stop the research if the risks become unacceptable.

When to Escalate

The researcher should escalate the issue to the institutional official if a committee does not respond to the submission within a reasonable time. The researcher should also escalate if the committee requests changes that the researcher believes are not justified. The escalation should be documented and should include the details of the issue.

The researcher should also escalate if the research is being conducted in a way that is not consistent with the approved protocol. The researcher should stop the research and report the issue to the committee.

Decision Framework for Resolving Conflicting IRB Requirements

When multiple committees issue conflicting requirements, researchers often stall because they treat every demand as equally binding. A structured decision framework helps you classify each requirement, determine which ones are negotiable, and build a defensible path forward without weakening ethical protections.

Classify Each Requirement by Source and Flexibility

Create a three-tier classification for every requirement you receive from any reviewing body. Tier one contains statutory and regulatory mandates. These are non-negotiable because they carry legal consequences. Examples include national data protection laws, local clinical trial regulations, and country-specific requirements for informed consent documentation. Tier two contains institutional policies that the committee cannot waive. These include requirements imposed by the host university or hospital administration, such as mandatory training certifications or specific insurance provisions. Tier three contains reviewer preferences and interpretive judgments. These are the most common source of conflict because they reflect individual reviewer concerns instead of binding rules.

The Committee on Publication Ethics Core Practices document provides a useful reference point for identifying which requirements touch on fundamental research integrity. Authorship standards, data provenance, and conflict-of-interest disclosure are core practices that should be treated as tier one or tier two. A requirement that merely reflects a reviewer's preferred formatting or a particular way of phrasing a consent statement is likely tier three.

Apply the Three Test Criteria

For every conflicting requirement, apply three tests before deciding how to respond.

The first test is the ethical floor test. Ask whether the requirement protects participants in a way that no reasonable ethics review could omit. If the answer is yes, the requirement is non-negotiable and you must find a way to meet it even if it conflicts with another committee's preference. For example, if one committee requires that a community leader provide permission before individual consent is sought and another committee forbids any gatekeeper consent, you cannot simply choose one. You must design a process that satisfies both the community engagement expectation and the individual consent requirement.

The second test is the legal jurisdiction test. Determine which country's law applies to the specific activity the requirement governs. Data collection that occurs in Kenya is subject to Kenyan law. Data storage that occurs on servers in the United States is subject to US law. A requirement from the Kenyan committee about how data is collected on Kenyan soil takes precedence over a US committee's preference about the same activity. A requirement from the US committee about how data is stored on US servers takes precedence over the Kenyan committee's preference about storage. The National Institutes of Health Grants and Funding portal confirms that NIH-funded research must comply with all applicable laws and regulations in every jurisdiction where the research occurs.

The third test is the proportionality test. Ask whether the requirement imposes a burden that is proportionate to the protection it provides. A requirement that adds a meaningful safeguard for a vulnerable population is proportionate. A requirement that duplicates an existing safeguard without adding new protection is disproportionate. You can document the existing safeguard and explain to the committee why the additional requirement is redundant.

Document the Conflict Resolution Process

For each conflict, prepare a written decision record that includes the following elements. First, quote the exact requirement from each committee. Second, classify each requirement using the three-tier system. Third, apply the three tests and record the outcome. Fourth, state your proposed resolution. Fifth, list the committees that must approve the resolution and the date you submitted it to each one.

The EQUATOR Network reporting guidelines can help you structure this documentation because they emphasize transparent description of decision processes. A clear decision record shows each committee that you took its concern seriously and that you resolved the conflict through a reasoned process instead of by ignoring one committee in favor of another.

Use a Staged Submission Strategy

When conflicts exist, do not submit the final protocol to all committees simultaneously. Instead, use a staged approach. Submit first to the committee with the most restrictive requirements. Once that committee approves, submit to the next most restrictive committee. This strategy prevents a situation where you receive conflicting revision requests at the same time and must choose which committee to satisfy first.

The staged approach also gives you a concrete record of which requirements were accepted by which committees. When a later committee requests a change that contradicts an earlier approval, you can show that the earlier committee accepted the protocol as written and ask the later committee to explain why its requirement should override that prior approval.

Escalate Only After Exhausting the Framework

The escalation criteria in the existing article remain valid, but you should apply this decision framework before escalating. Escalation to an institutional official is appropriate when a committee refuses to engage with your documented conflict resolution or when a committee demands a change that would violate the legal requirements of another jurisdiction. Escalation is not appropriate simply because a committee disagrees with your preferred approach. The framework gives you a defensible basis for escalation because it shows that you attempted a good-faith resolution.

Record the Outcomes for Future Projects

Maintain a conflict log that records every requirement conflict you encounter, the classification you assigned, the tests you applied, and the final resolution. Review this log after each project to identify patterns. If a particular committee consistently imposes tier-three requirements that conflict with other committees, you can anticipate that pattern in future submissions and address it proactively in your initial protocol design.

The National Library of Medicine research methods resources provide background on how ethical review decisions are documented across different settings. Reviewing these resources can help you understand what level of detail committees expect in a conflict resolution record. A thorough record that demonstrates careful reasoning is more likely to be accepted than a brief note that simply states a decision.

Frequently Asked Questions

What is the lead IRB model and how does it work?

The lead IRB model is an arrangement where one IRB conducts a full review of the protocol and other committees rely on that review. The lead IRB is usually the institution of the principal investigator. The other committees may conduct their own review of the local context, but they do not duplicate the full review. This model reduces the time and effort required for multi-site approval.

How do I handle a committee that requires a different consent process?

The researcher should prepare a site-specific consent process that meets the requirements of the local committee. The consent process should still include the core elements of informed consent, but it may be adapted to the local culture. The researcher should document the adaptation and should explain why the adaptation is appropriate.

What should I do if the committees have conflicting requirements?

The researcher should try to find a common approach that satisfies all committees. If this is not possible, the researcher should prepare site-specific documents that meet the requirements of each committee. The researcher should document the differences and should explain why the differences are necessary.

How long does the multi-IRB approval process take?

The time varies depending on the number of committees and the complexity of the research. The process can take several months. The researcher should begin the process early and should track the progress of each submission.

What is the role of the NIH in the ethics approval process?

The NIH requires that all research conducted under NIH funding be reviewed and approved by an appropriate ethics committee. The NIH does not provide the approval itself, but it requires that the institution confirm that the approval has been obtained. The NIH also requires a data management plan that covers the sharing of data.

What should I do if a committee rejects my protocol?

The researcher should review the rejection and should address the concerns raised by the committee. The researcher should revise the protocol and resubmit it. The researcher should also consider whether the rejection indicates a fundamental problem with the study design.

How do I handle data sharing across countries?

The researcher should prepare a data management plan that covers the legal and ethical requirements of each country. The plan should describe how the data will be stored, who will access, and how it will be transferred. The plan should also describe how the data will be shared with the broader community.

What is the role of the community in the ethics approval process?

The community may have a role in the ethics approval process, especially in settings where community consent is expected. The researcher should engage with the community and should explain the research. The researcher should also obtain the consent of the community leaders if that is the local expectation.

Using the Evidence

Related Articles

• Ethical Considerations in Research with Human Participants: A Guide to IRB Approval
• Ethical Standards in Research: What They Are and Why They Matter
• Ethical Considerations in Research with Vulnerable Populations: A Practical Guide
• The Role of the Research Ethics Committee: What Researchers Need to Know
• Ethical Considerations in Psychological Research: A Guide for Students and Early-Career Researchers

References and Further Reading

• Research Methods Resources. National Library of Medicine.
• EQUATOR Network. EQUATOR Network.
• Core Practices. Committee on Publication Ethics.
• NIH Grants and Funding. National Institutes of Health.
• ORCID for Researchers. ORCID.
• Data Management and Sharing Policy. National Institutes of Health.
• NCBI Literature Resources. National Center for Biotechnology Information.
• PubMed. National Library of Medicine.

This article is educational and does not replace institutional policy, professional advice, or applicable safety and regulatory requirements.