Table 5 PPV and sensitivity of E linkage strategies. N linkage used as the reference standard.
From: Linkage of health and aged care service events: comparing linkage and event selection methods
Match strategy | True positives (a) | False positives (b) | False negatives (c) | Total links (E = a+b) | PPV (a/E) | Sensitivity (a/N) |
|---|---|---|---|---|---|---|
Number | Per cent | |||||
Name-based N linkage | (N) 8106 | . . | . . | 8106 | . . | . . |
Event-based E linkage | ||||||
Basic | 6539 | 154 | 1567 | 6693 | 97.7 | 80.7 |
Constrained-SLG v1 | 7100 | 153 | 1006 | 7253 | 97.9 | 87.6 |
Constrained-SLG v2 | 7418 | 177 | 688 | 7595 | 97.7 | 91.5 |
Constrained-SLG v3 | 7420 | 170 | 686 | 7590 | 97.8 | 91.5 |
Constrained-PC v1 | 6936 | 142 | 1170 | 7078 | 98.0 | 85.6 |
Constrained-PC v2 | 7418 | 169 | 688 | 7587 | 97.8 | 91.5 |
Constrained-PC v3 | 7335 | 156 | 771 | 7491 | 97.9 | 90.5 |