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Linkage of large administrative datasets that include both limited and full personal identifiers may re-identify individuals and therefore pose a risk to privacy.
Many aged care datasets in Australia contain a Statistical Linkage Key (SLK-581) instead of full personal identifiers.
A combined approach using both probabilistic and deterministic linkage methods could be used in other settings where the datasets to be linked include full personal identifiers on some datasets and limited personal identifiers on others.
The population-based cohort was electronically linked, using full personal identifiers, to the population-based national cancer registries for England, Wales and Scotland through 'flagging' at the National Health Service Central Registers, which provided incident SC from 1971 (Hawkins et al, 1992).
It is not known the extent to which linkage of HACC data to other databases will be adversely affected by the use of the SLK-581 rather than full personal identifiers.
The aims of this study were to: examine the quality of SLK-581 derived for APD data; determine the optimal strategy to be used when linking datasets containing an SLK-581 with datasets containing full personal identifiers; and quantify the extent to which the recommended optimal strategy biases estimates of hospitalisation rates among HACC clients for a range of health priority areas.
Similarly, the Administration intelligence official said that no warrant was needed, because "there's no personal identifier involved, other than the metadata from a call being placed".
For decades, Mr. Lassiter said, the agency has cautioned the private sector against using the Social Security number as a personal identifier.
Only a minority (<20%) recalled their personal identifier correctly.
The only personal identifier entered was the NRMP number.
All databases were linkable through a unique, anonymised, personal identifier.
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