For security purposes, all operational activities for the Healthy Ageing Data Platform are undertaken inside the Peninsula Health’s data centre and governed by the Peninsula Health cyber security policies. This approach ensures compliance with data security related to the operations associated with the transmission and storage of data.
To avoid negative impact on operational systems key tables are copied, with weekly incremental updates, into staging areas within the NCHA data warehouse where business rules and cleaning operations are applied to merge the data with the core dataset. Once the warehouse is fully established, audit trails will be automated within the Healthy Ageing Data Platform warehouse to monitor who is accessing the data, movement of data between systems and changes in data use and structure. Audit requirements will be regularly reviewed to ensure that they are responsive to regulatory requirements Data quality and completeness is critical to determining the suitability of items for incorporation into the research data warehouse.
The World Health Organisation’s Data Quality Review (DQR) Framework is being used to guide the assessment of data quality. The DQR dimensions include:
- completeness – i.e., the proportion not containing null or blank values.
- specificity – calculated by excluding unknown, not specified, not stated, or ‘other’.
- timeliness – validated against data recording time.
- internal consistency – measured as consistency between similar variables recorded within different datasets.
- external consistency – validated against published literature and data collection points.
Internal data access is guided by the separation principle whereby identifiable data are kept separate to clinical data and staff only have access to the information needed for them to perform their role. For example, staff involved in managing the data are employed by Peninsula Health, have limited access rights to the data and are not given access to patients’ full records unless required. Person level data are assigned a platform ID within the Research Data Warehouse which can only be linked back to the hospital MRN using a linkage map held within Peninsula Health but external to the warehouse.