Table 2.

Frequency of sharing test results with first-degree relatives by mutation status.

Relationship		Shared results n (%)
		Positive (n = 3) n or % (range)	True negative (n = 31) n or % (range)	Uninformative (n = 11) n or % (range)
Parent	Mother (n = 16)	n = 1	n = 10	n = 5
	n (%)	1 (100.0)	9 (90.0)	4 (80.0)
	Father (n = 19)	n = 1	n = 12	n = 6
	n (%)	1 (100.0)	10 (83.3)	4 (66.7)
Sibling	Sister (n = 23)	n = 2	n = 14	n = 7
	Avg. number per participant	1.5 (1.0–2.0)	1.6 (1.0–4.0)	2.1 (1.0–4.0)
	Avg. % disclosed	100.0 (100.0-100.0)	92.9 (0.0–100.0)	91.7 (66.7–100.0)
	Brother (n = 22)	n = 2	n = 16	n = 4
	Avg. number per participant	2.0 (1.0–3.0)	1.6 (1.0–4.0)	2.0 (1.0–4.0)
	Avg. % disclosed	50.0 (0.0–100.0)	89.1 (0.0–100.0)	56.3 (0.0–100.0)
Child	Daughter
	<18 years (n = 4)	n = 0	n = 3	n = 1
	Avg. number per participant	—	1.3 (1.0–2.0)	2.0 (— )
	Avg. % disclosed	—	66.7 (0.0–100.0)	50.0 (— )
	18+ years (n = 19)	n = 2	n = 12	n = 5
	Avg. number per participant	1.5 (1.0–2.0)	1.3 (1.0–2.0)	1.4 (1.0–2.0)
	Avg. % disclosed	50.0 (0.0–100.0)	100.0 (100.0-100.0)	100.0 (100.0-100.0)
	Son
	<18 years (n = 7)	n = 0	n = 5	n = 2
	Avg. number per participant	—	1.0 (1.0-1.0)	2.0 (2.0-2.0)
	Avg. % disclosed	—	100.0 (100.0-100.0)	0.0 (0.0-0.0)
	18+ years (n = 15)	n = 0	n = 9	n = 6
	Avg. number per participant	—	1.4 (1.0–3.0)	1.7 (1.0–3.0)
	Avg. % disclosed	—	83.3 (0.0–100.0)	100.0 (100.0-100.0)

*Excluded those who did not share their results.

*Analyses are based on living relatives and include participants who reported at least one living relative in each relationship category.