Table 5. The results of Cox proportional-hazards model for radiological progression.

Variable selected	B	SE	Wald	P	HR	95% CI
Gender	−0.617	0.339	3.314	0.069	0.539	0.278~1.048
Age	−1.090	0.404	7.260	0.007	0.336	0.152~0.743
BMI	0.060	0.309	0.038	0.846	1.062	0.579~1.946
Bilateral hip involvement	0.027	0.402	0.004	0.947	0.539	0.443~2.140
Preoperative HHS	0.402	0.322	1.557	0.212	1.495	0.278~1.048
Bone marrow edema	0.465	0.311	2.226	0.136	1.591	0.864~2.930
ONFH etiologies			1.907	0.385
etiology (Corticosteroids)	0.332	0.449	0.546	0.460	1.393	0.578~3.357
etiology (Alcohol)	−0.178	0.472	0.143	0.705	0.837	0.332~2.111
ARCO stage	−0.747	0.341	4.802	0.028	0.474	0.243~0.924
CJFH type			10.960	0.004
type (L1)	−1.650	0.582	8.042	0.005	0.192	0.061~0.601
type (L2)	−0.733	0.303	5.846	0.016	0.481	0.265~0.870

B: regression coefficient; SE: standard error; HR: hazard ratio; Bold value indicate the significant P value.