השוואת שיטות

	סקירת-מטרייה תואמת PRISMA	סקירת מטריה
תחום	סיינטומטריה	סינתזת ראיות
משפחה	Process / pipeline	Process / pipeline
שנת המקור	2015 (umbrella review methodology); 2022 (PRIOR reporting extension)	2009
הוגה השיטה	Aromataris et al. (JBI); PRIOR reporting extension by Fusar-Poli et al.	Grant & Booth (2009), Refined by AMSTAR-2 (Shea et al., 2017)
סוג	Evidence synthesis / review of systematic reviews	Framework
מקור מכונן	Aromataris, E., Fernandez, R., Godfrey, C. M., Holly, C., Khalil, H., & Tungpunkom, P. (2015). Summarizing systematic reviews: Methodological development, conduct and reporting of an umbrella review approach. International Journal of Evidence-Based Healthcare, 13(3), 132–140.	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.
כינויים	umbrella review with PRISMA, PRIOR-guided umbrella review, overview of reviews, PRISMA umbrella overview	Overview of Reviews, Meta-Review, Review of Reviews
קשורות	5	2
תקציר	A PRISMA-compliant umbrella review is a structured synthesis of existing systematic reviews and meta-analyses on a topic, conducted and reported in accordance with the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines — specifically the PRIOR extension developed for umbrella reviews. By operating one level above primary research, it maps the totality of evidence, identifies convergent or contradictory findings across reviews, and quantifies evidence strength at the highest tier of the evidence hierarchy.	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.