So sánh phương pháp

	Tổng quan lập bản đồ	Tổng quan Ô (Umbrella Review)
Lĩnh vực	Trắc lượng khoa học	Tổng hợp bằng chứng
Họ	Process / pipeline	Process / pipeline
Năm ra đời	Late 1990s–2000s; major methodological formalization ~2010s	2009
Người khởi xướng	Buckland & Gann (1998); formalized by systematic review community (Campbell Collaboration, Collaboration for Environmental Evidence)	Grant & Booth (2009), Refined by AMSTAR-2 (Shea et al., 2017)
Loại	Systematic evidence mapping methodology	Framework
Công trình gốc	James, K. L., Randall, N. P., & Haddaway, N. R. (2016). A methodology for systematic mapping in environmental sciences. Environmental Evidence, 5(1), 7.	Grant, M. J., & Booth, A. (2009). A typology of reviews: An analysis of 14 review types and associated methodologies. Health Information & Libraries Journal, 26(2), 91–108.
Tên gọi khác	evidence map, systematic map, research map, literature map	Overview of Reviews, Meta-Review, Review of Reviews
Liên quan	6	2
Tóm tắt	A mapping review (also called a systematic map or evidence map) is a form of systematic review that aims to chart the extent, range, and nature of evidence on a broad topic rather than synthesize findings into a single pooled answer. It categorizes studies by key dimensions — such as intervention type, population, outcome, and study design — and presents the resulting landscape visually and tabularly so that researchers and practitioners can identify clusters of evidence, knowledge gaps, and priorities for future primary research or deeper synthesis.	An umbrella review is a systematic synthesis of multiple systematic reviews addressing overlapping or related research questions, typically on the same topic or intervention. Also called a 'review of reviews' or 'overview of reviews,' umbrella reviews consolidate evidence when two or more high-quality systematic reviews exist on the same clinical question. Grant and Booth (2009) formally categorized this methodology; Shea et al. (2017) developed AMSTAR-2, the critical appraisal tool for assessing the quality of included reviews. Umbrella reviews are essential when numerous systematic reviews produce conflicting conclusions, when rapid synthesis of evidence is needed for policy or clinical guidance, or when evidence has accumulated faster than any single systematic review can capture.