TABLE 1.

Baseline characteristics of the study population.

Characters	Overall	SONFH (n = 24)	non-SONFH (n = 16)	P
Female (%)	26 (62.5%)	16 (61.5%)	10 (38.5%)	0.073
Male (%)	14 (37.5%)	8 (57.1%)	6 (42.9%)
Age (year)	48 (36–75)	42 (41–75)	46 (36–71)	0.682
MBI (kg/m2)	24.7 ± 2.3	24.6 ± 2.4	25.1 ± 1.4	0.321
ARCO I–II (%)	8 (33.3%)	8 (33.3%)	0
ARCO III (%)	8 (33.3%)	8 (33.3%)	0	NA
ARCO IV (%)	8 (33.3%)	8 (33.3%)	0

ARCO, Association Research Circulation Osseous; SONFH, steroid-induced osteonecrosis of the femoral head; NA, Not applicable; MBI, Body Mass Index.