Table 1 Underestimation of Aboriginal status in unlinked hospital records of admission for cardiovascular disease compared with estimates based on linked hospital morbidity and death records
Aboriginal identification in hospital morbidity and death records | |||
|---|---|---|---|
Aboriginal positive, n | Index admission* | Index + 20-year admission history (majority-positive) | Index + 20-year admission history (ever- positive) |
Morbidity records alone | 3,060 | 3,094 | 3,636 |
Death records alone | 83 | 78 | 60 |
Morbidity or death records | 3,143 | 3,172 | 3,696 |
Underestimate in index cases relative to revised counts, % | 2.7 | 3.7 | 20.8 |