Table 1.

Distribution of relative pairs by degree of relationship in the Americaninhas study population (Minas Gerais state, Brazil, n=1302)

Relationship (degree)	Coefficient of relatedness	Number of pairs
Identical twins	1	4
First	0.5 – 0.5625	2853
Second	0.25 – 0.375	4062
Third	0.125 – 0.219	7246
Fourth	0.0625 – 0.117	9759
Fifth	0.031 – 0.055	9621
Sixth	0.0156 – 0.027	5237
Seventh	0.0078 – 0.017	1548
Eighth	0.0039	142
Total		40472