Question first
Define the users, purpose, available information and decision date.
A defined taskABOUT EVIDENCE OS
From your question to reviewable deliverables.
Evidence OS supports medical evidence synthesis, research collaboration and institutional evidence projects. We scope major treatment decisions, cancer and rare conditions, surgery, mental wellbeing, health products, guidelines and policy around defined inputs, review and deliverables.
Reviewable delivery
Keep sources, methods, gaps and uncertainty together.
Ready for review and handoverScoped investment
Price by workload, professional review and update frequency. Acceptance does not depend on a favourable result.
Agree before startingMeet the people behind the work
Review clinical and research experience, public papers and project responsibilities.
Team & responsibilitiesREAL RESEARCH · SYSTEMATIC REVIEW & META-ANALYSIS
Large-scale research. Reviewable work.
A systematic review and meta-analysis of preoperative social connection and postoperative outcomes. Explore the research scope, methods and limitations.
Explore the research caseAuthor-provided manuscript v1. Own research, not a paid customer engagement.20,399Deduplicated records
445Included studies
72Studies in quantitative synthesis
NEXT STEP
Request scope & quoteTell us the question. We’ll help define the scope.
Agree the scope, deliverables and review responsibilities before commissioning work.
THE BASIS FOR THIS SCOPE
Why this approach? Inspect the basis.
Trace a clinical question to the research and distinguish effect size, certainty and the population.
PubMed
NLM / NIH
Check papers, abstracts and original sourcesFind literature for a clinical question and inspect authors, publication dates, abstracts and full-text links.
Scope & access conditions
PubMed provides citations and abstracts, not journal full text. Access depends on the publisher or archive.
Read the official descriptionCochrane
Cochrane
Read systematic reviews and plain-language summariesExplore a question’s research synthesis and the confidence researchers have in the findings.
Scope & access conditions
Plain-language summaries are public; full-review access varies. Applicability still depends on the population and question.
GRADE · Cochrane Handbook
Cochrane · Chapter 14
Show effect size and confidence separatelyPresent important outcomes, relative and absolute effects, available data and certainty, with reasons for downgrading.
Scope & access conditions
GRADE evaluates a body of evidence for a particular outcome. Database inclusion or one study does not automatically establish high certainty.
These references support problem definition and evidence appraisal. Your conclusions still require project-specific sources and professional review.