Quick Answer: An umbrella review is a systematic collection and assessment of multiple systematic reviews and meta-analyses on one research topic.1 To conduct an umbrella review, check that enough reviews exist, register a protocol, search and screen the reviews, appraise them with AMSTAR 2, extract the data, measure overlap, re-analyse and grade the evidence, and report with PRIOR when you assess healthcare interventions.1,2,3 We redrew…
