Table 2.

Classifications of osteonecrosis of the femoral head

Variables	Number of hips (%)
Ficat stage [9]
II	59 (47.6)
III	65 (52.4)
Steinberg classification [37]
A	27 (21.8)
B	38 (30.6)
C	59 (47.6)
Ohzono classification [27]
A	9 (7.3)
B	35 (28.2)
C	80 (64.5)