Cousin

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COUSIN, domest. rel. Cousins are kindred who are the issue of two brothers or two sisters, or of a brother and a sister. Those who descend from the brother or sister of the father of the person spoken of are called paternal cousins; maternal cousins are those who are descended from the brothers or sisters of the mother. Vide 2 Bro. C. C. 125; 1 Sim. & Stu. 301; 3 Russ. C. C. 140; 9 Sim. R. 386, 457.

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Number of affected relatives in family 1 2 3 4 6 7 8 Number of families 22 3 1 -- -- -- Years of follow-up 10 years 22 5 1 -- -- -- 20 years 28 8 5 1 -- -- -- 25 years 31 12 5 1 -- -- 30 years 31 10 4 2 2 35 years 31 10 4 2 -- 1 1 Total relatives Total cases/150 Number of families 31 26 (173%) Years of follow-up 10 years 35 28 (18.7%) 20 years 63 42 (28.0%) 25 years 69 49 (32.7%) 30 years 83 49 (32.7%) 35 years 86 49 (32.7%) TABLE 2: Frequency and relationships of male and female close (1st, 2nd, and 3rd degree relatives) and distant (2nd and 3rd cousins) affected relatives and recurrent risks of 1st degree relatives.