Table 1.

Characteristics of included studies and MCMS

	Country	Sample duration	Sample size	Dislocation cases	Gender (M/F)	Age (year)	BMI (kg/m2)	Disease		Follow-up time (year)	MCMS
								OA	SONK
1.Bae et al. [5]*	Korea	2002–2016	1853	67	5/62	64 (48–80)	27 (19–35)	60	7	NA	67
2.Choy et al. [11]	Korea	2002–2005	164	15	14/133	65.5 (44–75)	NA	146	18	12.1 (10.1–14)	72
3.Kang et al. [6]	Korea	2003–2016	531	22	49/482	67.7 (56-78)	25 (20–29)	531	0	9.6 (6.6–12.5)	75
4.Kim et al. [13]	Korea	2002–2015	1410	42	151/1425	62 (43–86)	NA	1410	0	7.17 (0.5–14.42)	78
5.Tian et al. [7]	China	2006–2010	440	4	177/263	58.3 (44-81)	24 (23–32)	427	13	6.1 (5–9.3)	80
6.Xue et al. [8]	China	2005–2017	708	3	295/339	67.8	31	667	41	6.2 (2.7–12)	80
7.Yoshida et al. [9]	Japan	2002–2011	1251	10	180/810	77.2 (47–94)	NA	1186	65	5.2 (1–10.5)	76

*Bae et al. [5] provided basic data of patients with bearing dislocations only