Table 1.

Characteristics of 226 nuclear families included in the family-based association studies

Number of affected siblings	Number of unaffected siblings	Number of unaffected parents	Number of affected parents	Number of nuclear families
2	0	0	0	71
2	0	2	0	33
2	0	1	0	14
2	0	1	1	5
2	1	0	0	4
2	2	0	0	3
2	1	0	1	3
2	1	2	0	2
2	2	2	0	1
3	0	0	0	9
3	0	2	0	6
3	0	1	0	4
3	0	1	1	2
3	1	0	0	1
3	1	1	0	1
4	0	0	0	1
4	0	2	0	2
4	0	1	0	1
4	1	2	0	1
1	0	2	0	25
1	0	1	1	8
1	0	1	0	2
1	0	0	1	7
1	1	0	0	3
1	1	0	1	3
1	1	2	0	1
1	1	1	1	1
1	2	0	0	1
1	2	0	1	1
1	2	2	0	1
1	3	0	0	1
1	3	2	0	1
0	2	0	0	1
0	2	1	1	2
0	1	0	1	3