Master Linkage Key (MLK)

The Master Linkage Key is a system of continuously updated links within and between core health-related datasets in NSW and the ACT.

Quality assurance checks are regularly carried out on the Master Linkage Key.  For more information on our quality checks and procedures, click here.

CHeReL Master Linkage Key

70.6 million records
9.8 million people
7.11 average links per person
6,556,487 people with multiple records

NSW

Admitted Patient Data Collection
Jul 2000 – Jun 2012
26,574,150 records

(updated every 6 months)

Emergency Department Data Collection
Jan 2005 – Jun 2012
14,295,320 records
Perinatal Data Collection
Jan 1994 – Dec 2010
1,524,048 records
45 and Up Study
(baseline study respondents)
267,125 records
Central Cancer Registry
Jan 1994 - Dec 2008
504,894 records
RBDM death registrations
Jan 1985 - Dec 2012
1,269,403 records

(updated every 6 months)

RBDM birth registrations
Jan 1994 - Dec 2010
1,522,948 records
Notifiable Conditions Information System
Jan 1993 - Dec 2008
421,870 records
Perinatal Death Review Database
Jan 2000 - Dec 2009
7,160 records
ABS mortality data
Jan 1985 - Dec 2007
1,020,798 records
ABS Perinatal Deaths
Jan 1994 - Dec 2005
9,445 records
Mental Health Ambulatory Data Collection
Jan 2001 - Dec 2011
19,430,694 records

ACT

Admitted Patient Collection (Canberra Hospital)
Jul 2004 - Jun 2009
299,807 records
Emergency Department Information System (Canberra Hospital)
Jul 2004 - June 2009
258,771 records
Cancer Registry
Jan 1994 - Dec 2008
17,723 records
ACT Perinatal Data Collection
Jan 1997 - Dec 2008
24,246 records

Upcoming

NSW Perinatal Data Collection
Jan 2011 - Dec 2011
NSW Emergency Department Data Collection
Jul 2012 - Dec 2012

External Datasets

For information on other frequently-linked datasets outside the MLK, click here

About Us

The CHeReL was established in 2006 and is jointly managed by the Cancer Institute NSW and the NSW Ministry of Health. The ACT Government Health Directorate, the University of New South Wales and the University of Sydney are members of the CHeReL and are represented on the CHeReL Advisory Committee.

Contact us

Tel: (+61 2) 8374 3515
Fax: (+61 2) 8374 3600

Level 9
Central Avenue
Australian Technology Park
EVELEIGH NSW 2015

Latest updates

07 Jun 2013
Data linkage user group meeting Read more >

02 May 2013
Sign up for the next SURE training session Read more >

09 Apr 2013
Complete a short survey Read more >

05 Feb 2013
Next SURE training session Read more >

25 Jan 2013
Position Vacant Read more >

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