Functional and clinical outcome with modified lateral approach total hip arthroplasty in stiff hips with ankylosing spondylitis

Table 4 Comparison of parameters with other series

Ref.	Patients (hips)	Follow-up in mo	Pain relief, %	Final MHHS	ROM score/mean flexion	Approach	Complications, %
Bisla et al[20], 1976	23 (34)	42.5	91	NS	ROM-3	NS	5.88
Resnick et al[21], 1976	11 (21)	36	NS	NS	NS	NS	0
Williams et al[22], 1977	56 (99)	36	NS	NS	NS	NS	10
Baldursson et al[23], 1977	10 (18)	45.6	94	NS	Flexion-90	NS	0
Shanahan et al[24], 1982	12 (16)	89	94	NS	NS	NS	6.25
Finsterbush et al[25], 1988	23 (35)	90	NS	NS	Flexion-86	NS	14.28
Walker et al[26], 1991	19 (29)	58	97	NS	ROM-4	NS	0
Gualtieri et al[27], 1992	39 (73)	90	89	NS	NS	NS	0
Brinker et al[28], 1996	12 (20)	75	90	89.1	ROM-4	Posterior, lateral	0
Sochart et al[29], 1997	24 (43)	276	100	NS	ROM-4	NS	27.9
Lehtimäki et al[30], 2001	54 (76)	240	NS	NS	NS	NS	3.94
Joshi et al[31], 2002	103 (181)	120	96	NS	NS	Lateral, Hardinge	10.5
Kim et al[32], 2007	12 (24)	132	NS	82.3	NS	Lateral	12.5
Bhan et al[6], 2008	54 (92)	102	62	82.6	ROM-4	Posterior	14
Li et al[33], 2009	24 (39)	36	NS	91	ROM-4	Posterolateral	2.5
Tang et al[2], 2000	58 (95)	135.4	94	88.8	ROM-4.2	Posterior	20
Bangjian et al[34], 2012	12 (24)	50.4	100	86.25	Flexion-84	Posterolateral	0
Malhotra et al[35], 2012	23 (32)	42	NS	87.1	ROM-4	Posterior	4.7
Siavashi et al[36], 2014	77 (NA)	12	NS	88.22	ROM-5	Posterior, lateral	20.8
Xu et al[37], 2017	54 (81)	42	NS	86.1	Flexion-82.5	Posterolateral	0
Our series	40 (69)	38.33	92	90.67	Flexion-102.1739, ROM-4.9514	Modified Hardinge	1.4

ROM: Range of movement; MHHS: Modified Harris hip score; NS: Not specified; NA: Not available.