From: The indications for core decompression surgery in patients with ARCO stage I-II osteonecrosis of the femoral head: a new, comprehensive prediction system
Score
Estimated risk of treatment failure
7.5
< 10
10
< 20
11
< 30
12.5
< 40
14
< 50
15
< 60
17
< 70
18.5
< 80
20.5
< 90
> 20.5
100