DARE and NHS EED
The Database of Abstracts of Reviews of Effects (DARE) and the NHS Economic Evaluation Database (NHS EED) provide access to:

• Over 35,000 quality assessed systematic reviews of health and social care interventions
• Summaries of all Cochrane systematic reviews and protocols up to March 2015
• Over 17,000 economic evaluations of health and social care interventions

The Department of Health and the National Institute for Health Research (NIHR) funded the production of DARE and NHS EED between 1994 and March 2015. Although funding has ceased and we are no longer adding new records to the databases both can be accessed via the CRD website. Database records are also available via:

The Cochrane Library
NHS Evidence 
Trip Database
The Virtual Health Library 
Health Systems Evidence 
SUMSearch
The Knowledge Network of NHS Scotland
PubMed Health

HTA
The HTA database will continue to be maintained for the foreseeable future at CRD and currently provides access to over 15,000 summaries of completed and ongoing health technology assessments.

The Department of Health and the National Institute for Health Research (NIHR) funded the production of DARE and NHS EED between 1994 and March 2015. Although funding has ceased and we are no longer adding new records to the databases both can be accessed via the CRD website. 

DARE includes systematic reviews that evaluate the effects of health and social care interventions and the delivery and organisation of health and social care services. Also included are reviews of the wider determinants of health such as housing, and transport where these impact directly on health, or have the potential to impact on health and wellbeing.

Weekly searches of MEDLINE, EMBASE, CINAHL, PsycINFO and PubMed were carried out up until the end of December 2014. Full details of the search strategies are available here. We assessed thousands of citations to identify systematic reviews according to the following criteria:

1. Were inclusion/exclusion criteria reported?
2. Was the search adequate?
3. Were the included studies synthesised?
4. Was the quality of the included studies assessed?
5. Are sufficient details about the individual included studies presented?

To be included, reviews had to meet at least four criteria (criteria 1-3 were mandatory).
Critical abstracts were written for reviews of importance to the NHS. Each abstract contains a ‘bottom line’ summary relating to the question, findings and reliability of the conclusions. Brief details are also given of the review methods, the results and conclusions and uniquely, a critical assessment of the methods used and the reliability of the conclusions drawn. The commentary is intended to help users judge the overall validity and reliability of the review.

A copy of each abstract was sent to the original authors for information. Authors were invited to reply with corrections to factual errors, and other relevant research and where applicable, this information was added to the abstract.

DARE also includes records of all Cochrane systematic reviews and protocols, up to March 2015. Details of Campbell reviews were included where the interventions evaluated impacted directly on health or had the potential to impact on health.

The Department of Health and the National Institute for Health Research (NIHR) funded the production of DARE and NHS EED between 1994 and March 2015. Although funding has ceased and we are no longer adding new records to the databases both can be accessed via the CRD website. 

NHS EED includes economic evaluations of health and social care interventions. Economic evaluations compare the costs and outcomes of two or more interventions using cost-benefit, cost-utility, or cost-effectiveness analyses.

Weekly searches of MEDLINE, EMBASE, CINAHL, PsycINFO and PubMed were carried out, up until the end of December 2014. Full details of the search strategies are available here.

We assessed thousands of citations to identify relevant economic evaluations. Critical abstracts were written for those of importance to the NHS. Each abstract provides details of the key components of the economic evaluation and summarises the effectiveness information on which the evaluation is based. The overall reliability and generalisability of the study are stated along with any implications for the NHS.

A copy of each abstract was sent to the original authors for information. Authors were invited to reply with corrections to factual errors, and other relevant research and where applicable, this information was added to the abstract.

The HTA database includes completed and ongoing health technology assessments from around the world. The HTA database is a valuable source for identifying grey literature as much of the information it contains is only available directly from individual funding agencies. Database content is supplied by the 52 members of the International Network of Agencies for Health Technology Assessment (INAHTA) and by 20 other international HTA organisations. All new content is checked, proof read and published on the database by CRD.

Any study designated as a health technology assessment by the contributing organisation is eligible for inclusion on the database. Bibliographic details and contact information are provided for published projects, and the authors’ conclusions are included for some projects. Links to reports, project pages and/ or organisation websites are provided wherever possible.

The HTA database also contains records of ongoing HTA projects and records are updated when projects are completed. This enables funders and researchers to identify work already in progress and may help reduce unintended duplication of effort.