3302.0.55.004 - Information Paper: Death registrations to Census linkage project - Methodology and Quality Assessment, 2011-2012  
ARCHIVED ISSUE Released at 11:30 AM (CANBERRA TIME) 18/09/2013  First Issue
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Contents >> Raw and adjusted linkage rates >> 2006 and 2011 comparison

2006 AND 2011 COMPARISON

For total death registrations in the 2006 and 2011 projects, the corresponding raw and adjusted linkage rates were remarkably similar. Note that a considerably higher number of death registrations were linked in 2011 than in 2006 (142,697 compared with 98,898).

In 2011, raw linkage rates were higher for non-Indigenous than Aboriginal and Torres Strait Islander deaths, but this difference was reduced after adjustment.

The raw linkage rate for Aboriginal and Torres Strait Islander deaths was higher in 2011 than 2006 (80% compared with 74%). The adjusted rate for Aboriginal and Torres Strait Islander deaths in 2011 was almost ten percentage points higher than the raw linkage rate (90% compared with 80%). Adjusted linkage rates were not calculated by Indigenous status in 2006.

Looking at this another way, although in total 461 death registrations for Aboriginal and Torres Strait Islander people remained unlinked at the end of the linkage process, the difference between expected and actual links was much lower at 215. Therefore, of unlinked Aboriginal and Torres Strait Islander deaths, just over half were likely to have remained unlinked because the Census record was present but not found and just under half because there was no Census record to link to.

Reflecting the pattern of Census undercount, the adjustment had a much larger effect on linkage rates for Aboriginal and Torres Strait Islander persons (nine percentage points) than non-Indigenous deaths (three percentage points).




Table 3.4 - RAW AND ADJUSTED LINKAGE RATES, 2006 and 2011, By Indigenous status
ABORIGINAL AND TORRES STRAIT ISLANDER
NON-INDIGENOUS
TOTAL(a)



2006
2011
2006
2011
2006
2011

Total Death Registrations
1 800
2 345
103 987
150 238
106 945
153 455
Expected links(b)
. .
2 099
. .
145 248
103 198
150 266
Linked death registrations
1 327
1 884
96 531
140 037
(c)97 696
142 697
Unlinked death registrations
473
461
7 456
10 201
8 047
10 758
Raw linkage rate (%)
73.7
80.3
92.8
93.2
92.5
93.0
Adjusted linkage rate(d) (%)
. .
89.7
. .
96.4
94.7
95.0

. . Not applicable
(a) Includes Death registrations where the person’s Indigenous status was not stated.
(b) Expected links for 2006 were calculated at different population levels relative to 2011. Care should be taken when making direct comparison between 2006 and 2011 adjusted rates.
(c) Excludes 1,202 linked death registrations in 2006 that were estimated to be false links.
(d) Referred to as a ‘match-link rate’ in 2006. See Linking Census Records to Death Registrations (cat. no. 1351.0.55.030) for more information.



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