The SLaM BRC Clinical Data Linkage Service (CDLS) hosts a number of third-party clinical data sets that have been linked to CRIS in a secure safe haven.  Requests to include these data in your CRIS project should be detailed in this section.

A range of third-party data are held within the CDLS, including acute secondary care data for SLaM patients and controls (Hospital Episode Statistics [HES]) and local primary care data from Lambeth (Lambeth Data Net [LDN]).  Details of all the data sets held by CDLS can be found at www.maudsleybrc.nihr.ac.uk/facilities/clinical-record-interactive-search-cris/cris-data-linkages/ 

Approval
As well as complying with the CRIS security model, in agreement with third party data controllers and other approvals (e.g. research ethics committee approval) specific and additional conditions may need to be met to include linked data from the various different data sets held in CDLS. For example:  

• To access HES data users are required to have a SLaM substantive contract, honorary contract or KHP passport.  A research passport/ letter of access is not sufficient to access these data.
  
  
• In addition to CRIS Oversight approval, access to LDN data linked to CRIS is dependent on an independent (non-SLaM) project specific LDN approvals process. 
  
  

For further information on specific requirements, constraints, and conditions for accessing any data held within the CDLS please contact the CDLS Lead directly or via CRIS.Administrator@slam.nhs.uk

Access
Users will not be given direct access to CDLS data repositories.  Linked data held within CDLS will be extracted by the CRIS Extraction Team against agreed specifications and stored within the BRC_CRIS network drive, in accordance with the CRIS Security Model. In some cases, patient-level data may need to be fully anonymised at point of extraction (i.e., CRIS BRCID removed and replaced with a project specific patient anonym) in accordance with specific agreements.