International Hip Dysplasia Registries—A Comparison of scores:

OFA

BVA (UK)

FCI (European)

SV (Germany)

Excellent
0-4 (no score >3/hip)
A-1
Normal
Good
5-10 (no score >6/hip)
A-2
Normal
Fair
11-18
B-1
Normal
Borderline
19-25
B-2
Fast Normal
Mild
26-35
C
Noch Zugelassen
Moderate
36-50
D
Mittlere
Severe
51-106
E
Schwere

The above information is taken from the OFA website.

CLICK HERE TO READ ABOUT THE OFA HIP-SCORING SYSTEM