Table 2.

Examples of joint use of health data based on reuse of data routinely collected during patient follow-up with alternative patient identification, complementary data collection, alternative aggregations, and uses of data.

Examples	Patient identification				Data collection				Data aggregation				Data use
	Patient		Group		Patient		Group		Patient		Group		Patient		Group
	Ad hoc	Sysa	Ad hoc	Sys	Ad hoc	Sys	Ad hoc	Sys	Ad hoc	Sys	Ad hoc	Sys	Ad hoc	Sys	Ad hoc	Sys
Clinical practice		✓b			Basisc	Basis				✓				✓
Quality surveillance				✓		Reused	Compe					✓				✓
Clinical research			✓			Reuse	Comp				✓				✓
Individual prognosis			✓			Reuse	Reuse		✓		✓		✓

^aSys: Systematic or repeated data process.

^bAll check marks indicate unchanged activity-specific processes (see Table 1).

^cBasis: The routine collected follow-up data are the base for alternative uses.

^dReuse: Direct reuse of data collected in the cell above.

^eComp: Complementary data collection.