Empirical aspects of record linkage across multiple data sets using statistical linkage keys: the experience of the PIAC cohort study

Table 5 Match results from stepwise matching for first 50 steps for PIAC stage 3

Step	Linkage key	Matches	Step	Linkage key	Matches
1	key_601	45031	26	key_610	15
2	key_601_2	904	27	key_610_2	.
3	key_601_3	1357	28	key_616	1
4	key_601_4	26	29	key_616_2	.
5	key_604	5151	30	key_617	113
6	key_604_2	99	31	key_617_2	2
7	key_604_3	.	32	key_617_3	6
8	key_604_4	146	33	key_617_4	.
9	key_609	2027	34	key_605	725
10	key_609_2	28	35	key_605_2	22
11	key_613	257	36	key_605_3	30
12	key_613_2	3	37	key_605_4	1
13	key_602	383	38	key_608	6
14	key_602_2	13	39	key_620	2
15	key_602_3	4	40	key_618	30
16	key_602_4	.	41	key_612	227
17	key_603	883	42	key_612_2	1
18	key_603_2	12	43	key_612_3	7
19	key_603_3	19	44	key_612_4	.
20	key_603_4	1	45	key_611	1697
21	key_606	8	46	key_611_2	13
22	key_607	36	47	key_611_3	52
23	key_607_2	.	48	key_611_4	1
24	key_607_3	3	49	key_615	3
25	key_607_4	.	50	key_623	53
Summary of results
Matches with aged care assessment date (steps 1-105)					60780
Matches with assessment team identifier (steps 106-188)					7255
Other matches (steps 189-215)					8254
Total matches					76289

Legend for linkage key suffixes:
No suffix: linkage used preferred RCCP SLK-581 and preferred postcode
_2: linkage used alternative RCCP SLK-581 and preferred postcode
_3: linkage used preferred RCCP SLK-581 and alternative postcode
_4: linkage used alternative RCCP SLK-581 and alternative postcode
Note: See Table 3 for definition of keys. '600' series linkage keys use assessment date. Order of use is based on the joint unique key rate in Table 4. Table showing results for all selected keys is available from the authors on request.

ISSN: 1472-6963