Table 1 The inclusion criteria used by members of the Danish Cardiac Arrest Validation Group during the initial screening

Resuscitation providers documenting the presence of Do-Not-Resuscitate Orders (DNR) or advance directives

Resuscitation providers documenting change in the course of treatment (initiation, termination, continuation, withholding) based on non-clinical reasons (e.g. the appearance of the patient, intangible factors, other factors not of an immediately objectifiable character, etc.)

Resuscitation providers documenting discussion with family or caretakers about an agreed level of care)

Notes where members of the Danish Cardiac Arrest Registry, who collected data, were in doubt about why the resuscitation provider had acted the way they did