Table 1 Inclusion and exclusion criteria

Studies that report views of key stakeholders of deferred consent (HCPs, researchers, patients, family members, members of the public)

Research not appropriate for deferred consent (elective research, standard clinical procedures, vaccinations, screening)

Studies focusing on the procedure of deferred consent in research

Studies not reporting empirical research data (opinion pieces, descriptive processes, editorials)

Empirical research, using qualitative and/or quantitative methods, on gathering data on views of deferred consent from key stakeholders

Unpublished dissertations, conference abstracts, reports, protocol papers

Papers published before 1996

Papers not in the English language

Studies involving participants < 18 years old only