From: Classification of gluteal muscle contracture in children and outcome of different treatments
MA
MEI
AGM
Total
Level I
28
1
5
34 (21.6)
Level II
61
8
16
85 (53.8)
Level III
19
6
14
39 (24.6)
108 (68.4)
15 (9.5)
35 (22.1)
158 (100)