Table 2. Predicted value of functional age corresponding to FAB score.

FAB (score) →	Predicted value offunctional age (year)
0	1.2
1	1.8
2	2.3
3	2.9
4	3.4
5	4.0
6	4.6
7	5.1
8	5.7
9	6.2
10	6.8
11	7.4
12	7.9
13	8.5
14	9.0
15	9.6
16	10.2
17	10.7
18	11.3