What is PDQ-Evidence

Report
PDQ-Evidence
What is PDQ-Evidence?
• PDQ (“pretty darn quick”)-Evidence facilitates
rapid access to the best available evidence for
decisions about health systems and
population health
It is a version of Epistemonikos
database for Health systems and
population health evidence
Epistemonikos is a non-for-profit organisation based in Santiago, Chile
Our mission is “to bring high quality information closer to health decision
making through the use of information technologies”
What evidence?
Systematic reviews
Overviews of reviews
High-quality structured summaries
Primary studies included in systematic reviews
The problem: information overload
The challenge: to separate the wheat
from the chaff
23,000,000 records
only in PubMed
• 0,25% are
systematic reviews
Our goal
TO AGGREGATE ALL THE RELEVANT HEALTH EVIDENCE (FOR
DECISION-MAKING IN HEALTH SYSTEMS AND POPULATION
HEALTH) INTO A SINGLE DATABASE.
A little bit more about PDQ-Evidence:
Search strategy
PDQ-Evidence was developed and is maintained
by systematically searching PubMed and other
databases for relevant systematic reviews and
overviews of reviews.
Where do we search
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Cochrane database of systematic reviews (CDSR)
Database of Abstracts of Reviews of Effectiveness (DARE)
Health Technology Assessment Database
PubMed
LILACS
SUPPORT Summaries
EPPI-Centre Evidence Library
3ie Systematic Reviews and Policy Briefs
WHO Database
Campbell Library
SURE policy briefs
European Observatory on Health Systems and Policies
DFID
NICE public health guidelines and systematic reviews
Guide to Community Preventive Services
CADTH Rx for Change
McMaster Plus KT+
McMaster Health Forum Evidence Briefs
Systematic
reviews (SR) at
the centre
• The average SR takes
about 1-year of work
• We rescue that effort
by storing identified
studies
From: http://www.navigatingeffectivetreatments.org.au/understanding_systematic_reviews.html
The Centre for Health Communication and Participation with support from the Australasian Cochrane Centre
Where do we search?
 20 databases
Systematic
reviews (SR) at
the centre
• The average SR takes
about 1-year of work
• We rescue that effort
by storing identified
studies
From: http://www.navigatingeffectivetreatments.org.au/understanding_systematic_reviews.html
The Centre for Health Communication and Participation with support from the Australasian Cochrane Centre
All that effort into
a single database
Where do we search?
 20 databases
Relations are
stored in the
database
Unique feature
• One of PDQ-Evidence unique features is that it connects
systematic reviews and their included studies.
• This makes possible to navigate between primary studies and
reviews
Multilingual
• Spanish
• Portuguese
• French
Filters
Advanced search
• For systematic searches
• E.g. systematic reviews
Grey literature / unpublished
• Our search process implies searching for
published literature
And then going to:
- the list of studies included in reviews
- the list of reviews included in overviews and
policy briefs
INDEPENDENT OF
- WHERE IS PUBLISHED (OR IF IT IS PUBLISHED AT
ALL)
- LANGUAGE
Unique feature: matrix of evidence
• One of PDQ-Evidence unique features is that it connects
systematic reviews and their included studies.
• This makes possible to navigate between primary studies and
reviews, but also allows clustering systematic reviews based
on the primary studies they have in common.
• The concept of ‘Systematic reviews sharing included studies’
is a proxy of ‘systematic reviews answering a similar question’
Matrix of evidence
How do we feed PDQ-Evidence?
• Combination of machine technology and
human collaboration
~ 10 Software engineers (for 5 years)
~ 400 collaborators (Epistemonikos)
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Automatic search and upload
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Extraction of the studies included in the
systematic review
Selection of actual systematic reviews
by a network of collaborators
The numbers
• 30,000 records
• 3,300 systematic reviews
Conclusions
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One-stop shop for evidence
Multilingual database
User friendly
Relation between articles answering a similar
question
• Visualisation of ‘all the evidence’ for a specific
question
Let’ see some examples
Many thanks!!
Contact us:
[email protected]
[email protected]
…or follow us in your preferred language:
English: @epistemonikos
Spanish: @epistemonikosEs
German: @epistemonikosDe
French: @epistemonikosFr
….also in Facebook and google+
Portuguese: @epistemonikosPt
Italian: @epistemonikosIt
Arabic: @epistemonikosAr
Dutch: @epistemonikosNl
Chinese: @epistemonikosZh
Gabriel Rada
Associate Professor, Department of Internal
Medicine, Pontificia Universidad Católica de
Chile, Santiago, Chile
Director of the Evidence-Based Healthcare
Program (Chilean Cochrane Centre), Pontificia
Universidad Católica de Chile, Santiago, Chile
Co-director of the Southern American Branch of
the Iberoamerican Cochrane Centre
Member of GRADE working group
Co-founder, President and CEO of Epistemonikos
Foundation
More details here: about.me
e-mail: [email protected]
Twitter: @radagabriel

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