TABLE 1.

Distribution of relative pairs by category in the VAGES and SAFDS families

Relative pair	Relationship coefficient*	Number of VAGES pairs†	Number of SAFDS pairs‡
Parent-offspring	0.5	416	463
Siblings	0.5	1,003	586
Grandparent-grandchild	0.25	19	123
Avuncular	0.25	184	810
Half-siblings	0.25	47	88
First and second cousins	0.15625	—	20
Double first cousins	0.25	—	10
Great grandparent-grandchild	0.125	—	12
Grand avuncular	0.125	6	204
Half-avuncular	0.125	15	106
First cousins	0.125	24	793
Double first cousins, once removed	0.125	—	35
First and second cousins, once removed	0.078125	—	22
Great grand avuncular	0.0625	—	2
Half grand avuncular	0.0625	—	5
First cousins, once removed	0.0625	1	759
Half first cousins	0.0625	—	77
Double second cousins	0.0625	—	25
Second and third cousins	0.0390625	—	6
First cousins, twice removed	0.03125	—	30
Half first cousins, once removed	0.03125	—	13
Second cousins	0.03125	—	287
Second cousins, once removed	0.015625	—	75
Third cousins	0.0078125	—	8
Total		1,715	4,559

^*The relationship coefficient is 2 × coefficient of kinship of two individuals.

^†The total data used for the present study were obtained from 1,026 individuals distributed across 294 families. Of 1,026, however, 41 were unrelated individuals (see text for details).

^‡The total data used for the present study were obtained from 537 individuals distributed across 31 families.