From: Phenylketonuria patients’ and their parents’ knowledge and attitudes to the daily diet - multi-centre study
Age at study (years)
N
%
Male
Female
10–13
70
40.46
38
54.29
32
45.71
14–16
30
42.86
39
55.71
17–19
33
19.08
18
54.55
16
48.48
173
86
49.71
87
50.29
> = 20
45
24
53.33
21
46.67
Total
218
110
108