Table 1.

Patient characteristics

Case number	Age (years)	Gender	Primary diagnosis	Years since first replacement	Reason for revision	Paprosky classification	Surgery side	Follow-up (months)	Preoperative HHS	Postoperative HHS
1	60	Male	AVN	12	Aseptic loosening	3B	L	53	26	86
2	52	Male	AF	18	Aseptic loosening	3A	L	45	20	71
3	52	Female	AVN	15	Aseptic loosening	3A	R	45	21	84
4	44	Male	FNF	6	Septic loosening	3A	R	41	20	80
5	60	Male	AVN	21	Aseptic loosening	3A	L	34	17	69
6	45	Female	AVN	9	Aseptic loosening	3A	R	34	18	82
7	62	Male	AVN	20	Aseptic loosening	3A	R	31	30	85
8	67	Female	FNF	20	Aseptic loosening	3A	L	30	25	77
9	58	Male	OA	10	Aseptic loosening	3A	R	27	32	80
10	68	Male	FNF	10	Septic loosening	3B	L	24	35	87
11	59	Female	OA	8	Aseptic loosening	3A	R	18	28	79
12	68	Male	AVN	22	Aseptic loosening	3B	L	17	25	89
13	54	Male	AVN	10	Septic loosening	3B	R	14	32	84
14	69	Male	AVN	30	Aseptic loosening	3A	L	21	28	81
15	69	Male	AVN	30	Aseptic loosening	3A	R	21	28	81
16	49	Male	AS	25	Aseptic loosening	3A	L	14	36	83
17	49	Male	AS	25	Aseptic loosening	3B	R	14	36	83
18	60	Female	OA	11	Aseptic loosening	3A	L	16	32	76

AVN, avascular necrosis of femoral head; L, left; R, right; AF, acetabular fracture; FNF, femoral neck fracture; OA, osteoarthritis; AS, ankylosing spondylitis, HHS, Harris hip score