Limited IRB Review

Limited IRB review is a narrow, privacy-focused form of IRB review the 2018 Revised Common Rule requires as a condition of exemption for certain research involving identifiable private information or identifiable biospecimens. It is a distinct mechanism from both full-board review and expedited review — see Exempt vs Expedited IRB Review: What Separates the Two for that adjacent comparison.

Which exempt categories require it

Under 45 CFR 46.104’s eight exempt-research categories, four require limited IRB review before the exemption applies:

• 46.104(d)(2)(iii) — certain educational tests, surveys, interviews, or public-behavior observation involving identifiable, sensitive information
• 46.104(d)(3)(i)(C) — certain benign behavioral interventions collecting identifiable sensitive information
• 46.104(d)(7) — storage or maintenance of identifiable private information or biospecimens for potential future secondary research
• 46.104(d)(8) — secondary research use of identifiable private information or biospecimens under broad consent

The other four exempt categories (normal educational practice, non-identifiable survey/interview/observation research, most secondary-data-use categories that don’t involve broad consent, and the public-benefit and food-taste categories) do not require limited IRB review.

What the reviewer actually evaluates

A limited reviewer — commonly the IRB Chair or a designated experienced board member, the same reviewer authority described in IRB Chair — applies only the privacy and confidentiality safeguard criteria at 45 CFR 46.111(a)(7)-(a)(8): whether there are adequate provisions to protect subjects’ privacy and to maintain the confidentiality of data. This is narrower than the full risk-benefit review a convened board performs under 46.111(a)(1)-(2) for non-exempt research, and narrower than the risk-benefit review an expedited reviewer performs for minimal-risk non-exempt research.

Continuing review does not apply

Under 45 CFR 46.109(f)(1)(ii), research reviewed under limited IRB review is exempt from the ongoing continuing-review requirement that otherwise applies to convened-board research — the exemption determination, once made, does not need periodic IRB re-approval the way non-exempt research does.

How it differs from a Central/Single IRB determination

Limited IRB review is a determination about privacy safeguards for a specific exempt category; it is unrelated to the separate question of which IRB (a local board vs. a designated Central/Single IRB (sIRB)) has review authority over a multi-site study. A study can undergo limited IRB review at either a local IRB or a central IRB, depending on the institution’s reliance arrangements.

Frequently asked questions

Who conducts a limited IRB review?

Typically the IRB Chair or a designated experienced reviewer — not necessarily the full convened board.

Does limited IRB review mean the study isn’t exempt?

No — limited IRB review is a condition of exemption for four specific categories, not an alternative to exemption. Once the privacy/confidentiality criteria are satisfied, the study proceeds as exempt.

Is limited IRB review the same as expedited review?

No. Expedited review evaluates the full risk-benefit profile of minimal-risk, non-exempt research under 45 CFR 46.110. Limited IRB review evaluates only privacy/confidentiality safeguards for specific exempt categories under 46.111(a)(7)-(8). Both can be performed by a single designated reviewer, but they are legally distinct mechanisms serving different exemption/review pathways.