Under what guideline condition may abbreviated study reports be acceptable?

• A. In all trials for brevity.
• B. Only when the trial is small.
• C. In certain cases per ICH Guidelines for Structure and Content of Clinical Study Reports.
• D. Never; abbreviated reports are not acceptable.

Answer: (C)

Abbreviated study reports are allowed in certain situations under ICH E3. The guidelines recognize that not every trial requires a full-length CSR; for straightforward or small studies, or when a regulatory authority agrees that a concise presentation still conveys all essential information, a shorter, abridged report can be acceptable. The abbreviated format still includes the core elements—study design, methods, results, safety, and conclusions—but presents them more succinctly and with less detail than a full CSR. So, using an abbreviated format is permissible only in these specific cases described by the guidelines, not for every trial. The other options are too absolute: not all trials use abbreviated reports, and the guidelines do permit them in appropriate circumstances.