השוואת שיטות

	סקירת-מטרייה תואמת PRISMA	ניתוח מטא-אנליזה רשתי
תחום	סיינטומטריה	סינתזת ראיות
משפחה	Process / pipeline	Process / pipeline
שנת המקור	2015 (umbrella review methodology); 2022 (PRIOR reporting extension)	2002
הוגה השיטה	Aromataris et al. (JBI); PRIOR reporting extension by Fusar-Poli et al.	Lumley (2002)
סוג	Evidence synthesis / review of systematic reviews	Method
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.	Lumley, T. (2002). Network meta-analysis for indirect treatment comparisons. Statistics in Medicine, 21(16), 2313–2324.
כינויים	umbrella review with PRISMA, PRIOR-guided umbrella review, overview of reviews, PRISMA umbrella overview	Mixed Treatment Comparison, MTC, Indirect Comparison Meta-Analysis
קשורות	5	1
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.	Network meta-analysis (NMA) is a systematic method for comparing multiple interventions simultaneously within a single analytical framework, incorporating both direct evidence (head-to-head trials) and indirect evidence (comparisons via common comparators). First formalized by Lumley in 2002, NMA allows researchers to rank treatments and quantify comparative effectiveness even when some treatment pairs have never been directly studied.