Modified technique of advanced core decompression for treatment of femoral head osteonecrosis

Table 1 Results of the preoperative and follow-up examinations

ID	Gender	Age	Diagnosis	Stage, ARCO	Date of surgery	Pre-op HHS/VAS	3-mo HHS/VAS	Arthroplasty, 5 yr
653075	M	48	Non-traumatic ONFH (R)	II c	3-12-2013	50/8	83/1	No
653711	M	50	Non-traumatic ONFH (L)	II a	3-13-2013	63/7	93/1	No
665314	M	27	Non-traumatic ONFH (R)	II b	3-24-2013	66/7	97/0	No
947454	M	46	Non-traumatic ONFH (B)	R: II b; L: II b	1-22-2016	R: 71/6; L: 73/5	R: 85/1; L: 86/1	_
1265962	M	49	Non-traumatic ONFH (R)	II b	8-8-2019	68/6	91/1	_
1270768	M	38	Non-traumatic ONFH (R)	II b	8-30-2019	63/7	83/1	_

ARCO: Association Research Circulation Osseous classification system; Pre-op: Preoperative; HHS: Harris hip score; VAS: Pain according to visual analogue scale; M: Male; ONFH: Osteonecrosis of the femoral head; R: Right; L: Left; B: Both.