Table 3 HSD source for RCTs planning to use healthcare systems data as the sole data source for at least one outcome
Source | Number of trials (% of n trials planning to use HSD as sole data source for at least one outcome) | |
|---|---|---|
|  | Up to 2019 [8] (n=46) | 2019–2022 (n=24) |
Primary care data (all regional equivalents) | 8 (17%) | 5 (21%) |
NHS Digitala (including HES and all regional equivalents) | 27 (59%) | 19 (79%) |
ONS (and/or regional equivalents) | 27 (59%) | 3 (13%) |
Data collected specifically for patient group or healthcare intervention (to include patient registries, mortality records, etc.) | 26 (57%) | 7 (29%) |
Other | 5 (11%) | 2 (8%) |