Table 1.

Pairwise relationships among phenotyped individuals

Relationship	N pairs	Median Δage, y	Range of Δage, y	Degree	%Shared household
Monozygotic twins	3	0.00	0.00	0	100.00
Parent-child	1,007	25.79	11.25–56.61	1	46.28
Full sibs	1,144	5.56	0.00–24.77	1	15.47
Grandparent-grandchild	341	49.73	31.50–77.31	2	10.85
Avuncular	2,275	22.48	0.07–58.19	2	2.42
Half sibs	168	10.00	0.08–39.85	2	11.31
Double 1st cousins	11	2.68	0.06–8.69	2	0.00
1st cousins & half-1st cousins	2	2.54	1.27–3.82	2.415	0.00
Greatgrand-parent-greatgrandchild	16	62.88	50.99–68.26	3	0.19
Grandavuncular	646	41.38	18.96–75.13	3	0.46
Half-avuncular	379	17.80	0.18–59.79	3	0.79
1st cousins	2,467	7.04	0.00–39.16	3	0.85
Double 1st cousins, once removed	55	23.13	9.44–37.11	3	0.00
Half-1st cousins & 2nd cousins	6	3.96	0.05–7.87	3.415	0.00
Great-grandavuncular	28	61.61	51.37–75.73	4	0.00
Half-grandavuncular	18	14.46	4.92–46.00	4	0.00
1st cousins, once removed	2,299	16.60	0.01–55.49	4	0.04
Half-1st cousins	379	7.06	0.10–34.10	4	0.00
Double 2nd cousins	45	4.69	0.03–14.30	4	0.00
5th -degree relatives	1,107	9.23	0.01–60.44	5	0.00
6th -degree relatives	240	10.54	0.01–29.50	6	0.00
TOTAL	12,548	15.45	0.00–77.31	--	6.26

Counts of pairwise relationships among the 1,240 phenotyped subjects and distribution of their absolute differences in age (Δage). Degree of relationship may be non-integral for individuals related via multiple loops. Household sharing is based on domicile at time of recruitment.