Table 2.

Criteria for the selection of the EuroHeart data variables

Domain	Criteria
Importance	Variables related to quality indicators that are important for monitoring and benchmarking of quality of care.
	Variables related to areas where there are disparities or suboptimal care.
	Variables addressing appropriateness of medical interventions.
Evidence base	Variables based on evidence consistent with current medical knowledge and the ESC Clinical Practice Guidelines.
Validity	Variables that can correctly assess what they are designed to measure.
Reliability	Variables that can be collected and assessed in a reproducible manner, including when collected by different people.
Feasibility	Variables can be collected and assessed readily and easily within acceptable time frames.
Applicability	Variables that support the purpose of the registry, e.g. quality improvement, observational and randomized research, and drug and device monitoring.

ESC, European Society of Cardiology.