Table 2.
Linkage stages in the PIAC project
| Stage | Dataset 1 | Dataset 2 | Minimum match rate (from one-step deterministic linkage on SLK-581) | Final match rate (from stepwise deterministic linkage) | ||
|---|---|---|---|---|---|---|
| % dataset 1 | % dataset 2 | % dataset 1 | % dataset 2 | |||
| 1 | Residential care 2002-06(a) | Community care packages 2002-06(a) | 9.4 | 44.0 | 10.2 | 47.7 |
| 2 | Deaths July 03-Dec 06(a) | RCCP 2002-06(a) (from stage 1) | 32.6 | 36.9 | 36.2 | 41.0 |
| 3 | PIAC cohort (ACAP 2003-04)(b) | RCCP 2002-06(a) | 64.4 | 16.3 | 72.6 | 18.4 |
| 4 | Deaths July 03-Dec 06 not linked to RCCP (a) | ACAP 2003-04 not linked to RCCP(b) | 3.0 | 31.4 | 3.3 | 34.7 |
| 5 | PIAC cohort(b) | Aged care assessments 2004-05(b) | 29.4 | 21.8 | 30.9 | 22.9 |
| 6a | PIAC cohort(b) | Home and Community Care 2002-03(b) | 41.6 | 7.1 | 46.3 | 7.9 |
| 6b | PIAC cohort(b) | Home and Community Care 2003-04(b) | 53.4 | 8.3 | 58.5 | 9.1 |
| 6c | PIAC cohort(b) | Home and Community Care 2004-05(b) | 35.9 | 5.3 | 39.5 | 6.0 |
| 6d | PIAC cohort(b) | Home and Community Care 2005-06(b) | 22.8 | 3.4 | 26.2 | 3.9 |
| 7 | PIAC cohort(b) | Veterans' Home Care January 2001 - March 2008(a) | 11.4 | 7.3 | 12.2 | 7.8 |
(a) Clients identified through administrative processes, and de-duplication.
(b) Clients identified by SLK-581 within broad region (1st digit of postcode)
Note: For the datasets with administratively-derived person identifiers, data for all years in the study were linked at the same time. For data sets with clients identified by SLK-581 data were linked for each year separately to allow for variation over time in reported SLK-581.