Table 1

Timepoints of data collection

Patient characteristics	Data	Timepoints
Patient characteristics	Data	Hospital stay	Daily	Hospital discharge	30 days	6 months
Pre-ICU data
Socio-demographic	Age	X
	Sex	X
	Height	X
	Weight	X
Medical background	Pre-arrest neurological function	X
	Charlson Comorbidity Index	X
	Measurement of pre-arrest Clinical Frailty Score (1–9)	X
Hospital admission	SOFA score on admission (without neurological subscore)	X
Hospital admission	First ABG available after ROSC	X
ICU data	Temperature	X	X
	Arterial blood gases (every 4 hours)	X	X
	Haemodynamic (mean arterial pressure and HR)	X	X
	Ventilator settings: PEEP, tidal volume, Pplat	X	X
	FOUR Score: eye response, motor response, brainstem score and respiratory score	X	X
	SOFA score (without neurological subscore)	X	X
	Adverse events	X	X
	If trial intervention has been discontinued, time of discontinuation and specified reason	X	X
	If active intensive care is withdrawn, specify reason	X	X
	If dead, specify presumed cause of death, cardiac, cerebral or other	X	X
	Results of the clinical neurological examination	X	X
	The stated prognosis from the blinded examiner, dichotomised as poor outcome likely (yes/no), based on the definition in the trial protocol and which criteria are fulfilled	X	X
Post-ICU data	ICU discharge			X
	Hospital discharge			X
	Complications			X
	Days of mechanical ventilation			X
	Ventilator-free days			X
Follow-up	mRS				X	X
Follow-up	Death				X	X

ABG, arterial blood gas; HR, heart rate; ICU, intensive care unit; mRS, Modified Rankin Scale ; PEEP, positive end-expiratory pressure; Pplat, plateau pressure; ROSC, return of spontaneous circulation; SOFA, sequential organ failure assessment.