Understanding different types of review articles: A primer for early career researchers.

Abstract

Review articles are central to evidence synthesis, yet early career researchers often struggle to select and apply appropriate methodologies. This primer provides a comprehensive overview of five major types of evidence synthesis-quantitative, qualitative, mixed methods, mapping, and meta-evidence synthesis. It also discusses rapid reviews and living reviews as distinct modes of conducting synthesis rather than standalone types. Each review approach is described in terms of its purpose, methodology, strengths, limitations, and suitable application. Key reporting frameworks-including PRISMA, PRISMA-ScR, MOOSE, ENTREQ, and JBI guidance-are referenced to promote methodological transparency. The article also reflects on concerns around redundancy and bias, particularly in systematic reviews and meta-analyses. By situating each review type within a broader ecosystem of knowledge synthesis, the article underscores their complementary roles in informing policy, practice, and future research. This primer serves as a foundational resource for early career researchers and educators, with a companion article planned to guide the process of planning and writing different types of reviews.