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Table 3 The separation ratio estimate in first-degree relatives

From: Familial aggregation and heritability of hypertension in Han population in Shanghai China: a case-control study

Siblings number per household Household number Total siblings number(T) Cases among siblings (R) Household number have only one case among siblings (J)
1 167 167 167 167
2 163 326 154 129
3 119 357 160 87
4 106 424 168 89
5 75 375 121 43
6 29 174 53 18
7 17 119 49 14
8 2 16 6 1
9 5 45 11 3
10 1 10 2 0
Total 684 2013 891 580