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Introduction to evidence synthesis [email protected]

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Introduction to evidence synthesis

[email protected]

Objectives

General information regarding systematic reviewing and

evidence synthesis

CLAHRC – Collaboration for Leadership in Applied Health

Research and Care – Applying for funds to do a systematic review

– Proposed CPD programme in evidence synthesis and implementation

Evidence synthesis

Historical perspective

Review methodology

Developing research questions

“Systematic reviews locate, appraise and

synthesise evidence from scientific studies in

order to provide informative empirical

answers to scientific research questions”

(Deeks et al, 1996)

EVIDENCE-BASED HEALTH CARE

“The conscientious, explicit and judicious use of

current best evidence in making decisions about the

care of individual patients. The practice of evidence-

based [medicine] means integrating individual clinical

expertise with the best available external clinical

evidence from systematic research” (Sackett et al,

1996)

Historical Perspective

Cochrane Collaboration

Working together to help healthcare practitioners, policy-makers, patients, their

advocates and carers, make well-informed decisions about health care, by preparing,

updating, and promoting the accessibility of Cochrane Reviews

5

The Campbell Collaboration (C2) helps people make well-informed decisions by preparing, maintaining and

disseminating systematic reviews in education, crime and justice, social welfare and

international development

6

Evolution of reviewing methods

Synthesis of qualitative data – Sandolowski

http://eprints.ncrm.ac.uk/468/1/1007_JTAHthematic_synthesis.pdf

– Scottish guidelines

http://www.healthcareimprovementscotland.org/programmes/clinical__cost_effectiveness/pro

gramme_resources/synth_qualitative_research.aspx

– Centre for Reviews and Dissemination (CRD) University of York

http://www.york.ac.uk/inst/crd/index_guidance.htm

Realist synthesis – CARES – Centre for the Advancement of Realist Evaluation and Synthesis

http://www.liv.ac.uk/psychology-health-and-society/research/cares/

– Ray Pawson

http://www.ccsr.ac.uk/methods/publications/documents/RMPmethods2.pdf

7

Challenge to health care professionals

Accessing the information

Interpreting/appraising the information

Implementing the evidence

Systematic review activities

Development of research question and protocol

Searching

Application of inclusion criteria

Quality assessment

Data extraction and presentation

Synthesis

Research question - PICO

Population

Intervention

Comparator

Outcome

Other review questions - PICo

Population

Phenomena of Interest

Context

Joanna Briggs Institute, 2011

Research protocol – a must

Would anyone be allowed to conduct a randomised

controlled trial or other research without a protocol?

For some reason people think that they do not need a

protocol for a systematic review!!

Searching

Databases – how many – how far back

Internet – Google Scholar

Hand searching (computer TOC)

Contacting experts

Managing results

ScHARR – qualitative data searching

E Exploratory methods. Include search terms related to the methodology of interest, such as focus group, grounded

theory, action research

S Software: Include search terms related to software researchers may have used to analyze their data, such as NVivo

or Nudist

C Citations: Include key references, both in your specific research area and more globally in the qualitative research

arena

A Application: Consider searching terms related to the wider application of potentially relevant studies, such as

ethnology or psychology

P Phenomenon: Include search terms related to the phenomenon of interest, such as perceptions, attitudes, view

points, standpoints

A Approaches: Consider searching for different methodological approaches, such as ethnography

D Data: Think how researchers may have ‘labelled’ their data in their paper and include terms such as stories,

narratives, themes

E Experiences: Similarly, consider how researchers may have conceptualised participants’ experiences, using terms

such as encounters

Applying inclusion criteria

Who does it

Doing it independently

Doing it in stages

)

Quality assessment

Question - Which is the right tool?

Answer – IT depends

Quality assessment tools

Sources – General – CASP http://www.phru.nhs.uk/casp/casp.htm

– http://www.shef.ac.uk/scharr/ir/netting/

RCT – CONSORT statement – Moher, D., Schulz, K., Altman, D. and Group, a. t. C. (2001) The CONSORT

statement: revised recommendations for improving the quality of reports of parallel-group randomized trials. JAMA, 285, 1987-1991.

Systematic reviews – PRISMA document – http://www.prisma-statement.org/

What do you do with the results of the QA

Most people don‟t do anything

Sensitivity analysis

Substantiate decisions related to data synthesis

Data extraction and presentation

Tables describe

Text discusses

Sample of tables

Quality assessment

Study characteristics

Participant characteristics

Outcomes

Document production

Good preparation leads to good performance

It always takes longer than you think

Discussion and conclusions

Need time to „absorb‟ data to write these (unless you wrote them before the review)

Developing a review question

Clinical question – What works best

Process question – How to do what works best

Resource available.

CLAHRC

Collaboration for Leadership in Applied Health Research and

Care – North West Coast

42 Partners – CCGs, HEIs, Local Authorities

Focus on health inequalities and patient and public involvement

Five themes – Evidence synthesis, mental health, complex need, personalised medicine and knowledge

exchange

Evidence Synthesis activities – Support the conduct of reviews (funded research)

– CPD for implementation of change

Evidence synthesis – funding application

CPD Programme

Work in teams to:

undertake an evidence synthesis project

gain organisational support

influence, implement and evaluate practice change in the

workplace

Blended learning programme

Over 12 months:

4 sequenced interactive workshops interspersed with -

distance learning support

mentor/supervisor support

action within the workplace

peer support and action learning sets

Evidence Synthesis Information Events

9th October, Lancaster University

22nd October, Best Western, Leyland

27th November, University of Liverpool

http://www.clahrc-nwc.nihr.ac.uk/news-events.php

Rumona Dickson

[email protected]