10. Data extracted but not analysed.

Study ID	Outcome category	Outcomes reported	Results	Assessment method and timing
Lautrette 2007	Knowledge and understanding	Time for information	Sufficient time Intervention 51/56 (91%) Usual care 45/52 (87%)	Surrogate telephone interview; 90 days after death of patient
		Clarity of information	Information was clear Intervention 52/56 (93%) Usual care 45/52 (87%)	Surrogate telephone interview; 90 days after death of patient
		Additional information requested by family	Additional information was requested  Intervention 17/56 (30%) Usual care 24/52 (46%)	Surrogate telephone interview; 90 days after death of patient
Bernacki 2019	Anxiety (moderate to severe symptoms; GAD‐7)		10.4% (intervention) versus 4.2% (usual care)	24 weeks post‐baseline (approximately 12 weeks post‐intervention)
Clayton 2007	Anxiety (STAI)		38.7 (intervention) versus 37.5 (usual care)	3 weeks post‐intervention
Lautrette 2007	Anxiety (HADS, score > 8)		44.6% (intervention) versus 67.3% (usual care)	90 days after death of patient

Data at longest time point are reported unless otherwise indicated.

HADS: Hospital Anxiety and Depression Scales; STAI: State‐Trait Anxiety Inventory.