Updated  1 April 2014

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Latest record counts

Access to the archive website update are here.

Latest Events & UPDATES

CENTRAL clean-up – March Issue3 2014 (Published & released to The Cochrane Library  started processing on 31st March 2014)

The records published in the Cochrane Central Register of Controlled Trials (CENTRAL) have undergone a “cleanup”. Metaxis, the company that compiles CENTRAL on behalf of Cochrane and delivers the records to Wiley, ran a series of checks to identify errors and omissions in CENTRAL records and to correct them automatically where possible.  Most records have had at least one field cleaned. Fields that should only contain specific values have also been tidied up (for example the Study Design field should only contain RCT, CCT, ITS or CBA, and the Language field should only contain the ISO language codes). 

An in-depth deduplication check has also taken place which has resulted in 8793 records being merged with other records.

Some examples of the kind of errors fixed are:

  • Fields with clearly incorrect values have been cleared (e.g. MeSH terms in a Year field or Keywords in a URL field)
  • Titles all in upper case (capital letters) have been converted to sentence case
  • Page numbers have been changed to the abbreviated format  (e.g. 687-90 not 687-690)
  • The values in the Study Design field have been restricted to RCT, CCT, ITS and CBA
  • Language field values have been converted to ISO 639 codes (e.g. eng not English)
  • Pubmed IDs checked (some Pubmed IDs were pointing at incorrect Pubmed records)
  • URLs checked for valid structure (e.g. http://www....) and incorrect URLs removed
  • DOI checked for valid structure (e.g. 10.1111/papr.12013) and incorrect DOIs removed
  • Journal names have been converted to NLM journal authority list format (e.g. “Lancet Neurol” converted to “Lancet neurology”)
  • MeSH terms have been checked against the current (2014) thesaurus and errors corrected

A full report will be made available once the project is finalised.   



If you do experience a MeSH search issue, which you would like to have investigated, or if you have any questions regarding these changes, please contact or for account managed customers please contact your Wiley Account Manager. 

CENTRAL - Processing this entire database is ongoing and search results and records may be inaccurate until loading is completed. 

GIV data analysis graphical display for Reviews fail to contain the information in the original source material. - Wiley are investigating and will report the findings to the Cochrane Editorial Unit.

Forest Plots - Weight % column missing from the forest plots.

Withdrawn Protocols are currently retained inThe Cochrane Library.

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PatientAccess not available to Cochrane Users. (RESOLVED)

Overview of searching the CDSR.

Start date End date Time period used for limits* Issues searched Issue name displayed in search results
1 March  1 April  TWO most recent issues  Feb + March 2014   Issue 3 of 12, March 2014
 “Issue updated daily throughout month”

* Limits: (1) Search CDSR AND limit to statuses: New, New Search, Conclusions Changed, Major Change; (2) Limit Search results to Current Issue.


Scheduled Maintenance

NEXT release activity FOR cochrane - COMMENCING FRIDAY 2nd MAY 2014.

Details to follow nearer to the activity date.

If you do have any problems with access please contact

Due to the natural of technology and its development, it has become standard practice throughout many organisations to have regular, scheduled, updates to systems. By taking this approach, there is a reduced risk to functionality and other systems. Users can also plan to avoid usage during these maintenance periods.The dates below indicate an expectation of scheduled maintenance which may disrupt access and functionality of The Cochrane Library.(The standard schedule for developer activities commences at 10am (UK Time), and continue for 2 hours, though this is subject to change).These dates are subject to change.Notifications of the expected downtime will be sent out in the week prior to the expected downtime, to users on the Cochrane 'lists' (TSCs, MEs and Cochrane Library User Group).      

Scheduled: Saturday 10 am GMT

3rd May 2014

7th June 2014

6th September 2014

6th December 2014

Record count for Mar Issue 2013

Total Records
Cochrane Database of Systematic Reviews*
Database of Abstracts of Reviews of Effects
Cochrane Central Register of Controlled Trials
Cochrane Methodology Register**
Health Technology Assessment Database
NHS Economic Evaluation Database
About The Cochrane Collaboration†

* Comprises 5914 published reviews and 2350 protocols, of which 38 are new reviews, 28 reviews had a new search and 8 of those had conclusions changed, 52 new protocols and 21 updated protocol. There were 5 withdrawn reviews and 24 withdrawn protocols. Totalling 230 withdrawn reviews in CDSR.

**CMR  - The CMR database is currently not being updated as from the 31st May due to lack of funding for core activity. It is no longer supported by the UKCC. The plan is to draw together interested individuals to review the current format and focus of this database and consider options to take it forward. If this is of particular interest please contact Jackie chandler

† The Cochrane Collaboration: 1; Cochrane Editorial Unit: 1; Cochrane Review Groups (CRGs): 53; Fields: 11; Methods Groups: 16. There are also 14 Centres (some with specific Branches). Links to their individual websites can be found here.

Access to the archive website update are here.

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