High-Energy Extracorporeal Shock Wave for Early Stage Osteonecrosis of the Femoral Head: A Single-Center Case Series

Table 1

Patient demographic characteristics.

Demographics	Values
Gender (male : female)	229 : 106
Age	43.7 ± 13.7
Cause
Steroid	178
Alcohol	81
Idiopathic	67
Other	9
Underlying disease
Rheumatic and autoimmune disease	81
Hematopathy	64
Dermatosis	15
Transplantation	8
Severe trauma	7
Hormone abuse	2
Other	1
Duration of symptoms (M)	5.7 ± 8.9
ARCO stage lesions (hips)
Stage I	137
Stage II	246
Stage III	145
CJFH classification (hips)
Type M	81
Type C	184
Type L1	111
Type L2	57
Type L3	95
Length of follow-up (M)	14.9 ± 9.7

Note: M: month; CJFH: China-Japan Friendship Hospital; ARCO: the Association Research Circulation Osseous.