Table 1.

Summary of attributes and levels used in the DCE survey

Test attribute	Possible levels for each testing alternative
	Whole genome sequencing	Whole exome sequencing	Cardiac panel test	Genetic testing not indicated
Ability of the test to identify pathogenic mutations	Pathogenic mutation is identified in 20 out of every 100 cases			Pathogenic mutation is identified in 0 out of every 100 cases
	Pathogenic mutation is identified in 30 out of every 100 cases
	Pathogenic mutation is identified in 40 out of every 100 cases
	Pathogenic mutation is identified in 50 out of every 100 cases
Ability of the test to identify variants of unknown significance	Variant of unknown significance is identified in 10 out of every 100 cases			Variant of unknown significance is identified in 0 out of every 100 cases
	Variant of unknown significance is identified in 20 out of every 100 cases
	Variant of unknown significance is identified in 30 out of every 100 cases
Test cost	£1000	£500	£150	£0
	£3000	£1500	£300
	£5000	£2500	£450
	£7000	£3500	£600
Quantity of counselling received	40 min	40 min	10 min	0 min
	50 min	50 min	20 min
	60 min	60 min	30 min
Disclosure of secondary findings	No secondary findings disclosed		No secondary findings disclosed
	Subset of well-characterised secondary findings disclosed