From: The posterior urethral valves revisited: embryological correlation, clinical classification, and risk stratification of the spectrum
Clinical group at follow-up
n = 102
%
A I
14
13.7
A II
4
3.9
B I
24
23.5
B II
6
5.89
C I
32
31.3
C II
8
7.84
D
13
12.7
E
1
0.98