From: Multilevel analysis of systolic blood pressure and ACE gene I/D polymorphism in 438 Swedish families – a public health perspective
Family size
Number of individuals
Number of families
Percentage
2
120
60
13.7
3
321
107
24.4
4
512
128
29.2
5
260
52
11.9
6
192
32
7.3
7
133
19
4.3
8
112
14
3.2
9
108
12
2.7
10
1.4
≥11
1.8
Total
1926
438
100