Table1. Characteristics of included studies.
Study type
|
1st author
|
Age
|
Female
|
Male
|
Type of
dislocation
|
Number of cases
|
Mean
|
Number
|
Number
|
|
|
Case report
|
Abdulfattah [1]
|
32.00
|
1
|
0
|
Bi
|
1
|
Alshammari [2]
|
19.00
|
0
|
1
|
Bi
|
1
|
Cobar [3]
|
23.00
|
1
|
0
|
Bi
|
1
|
Giaretta [4]
|
23.00
|
0
|
1
|
Bi
|
1
|
Hoffman [5]
|
20.00
|
0
|
1
|
Bi
|
1
|
Pathinathan [6]
|
32.00
|
0
|
1
|
Bi
|
1
|
Rufer [7]
|
53.00
|
0
|
1
|
Bi
|
1
|
Sahito
[8]Case1
|
30.00
|
0
|
1
|
Bi
|
1
|
Sahito
Case2
|
32.00
|
0
|
1
|
Bi
|
1
|
Case series
|
Buckwalter [9]
|
32.90
|
18
|
76
|
Bi
|
94
|
Lima [10]
|
34.40
|
4
|
39
|
Uni
|
43
|
Sahin [11]
|
34.50
|
15
|
47
|
Uni
|
62
|
Total
|
|
33.53
|
39
|
169
|
|
208
|
“Uni” stand for unilateral dislocation of hip and “Bi” stand for asymmetrical bilateral dislocation of hip.
1. Abdulfattah Abdullah, A.S., A. Abdelhady, and A. Alhammoud, Bilateral asymmetrical hip dislocation with one side obturator intra-pelvic dislocation. Case report. Int J Surg Case Rep, 2017. 33: p. 27-30. DOI: https://doi.org/10.1016/j.ijscr.2017.02.012
2. Alshammari, A., et al., Asymmetric bilateral traumatic hip dislocation: A case report. Ann Med Surg (Lond), 2018. 32: p. 18-21. DOI: https://doi.org/10.1016/j.amsu.2018.06.008
3. Cobar, A., et al., An unusual case of traumatic bilateral hip dislocation without fracture. J Surg Case Rep, 2017. 2017(5): p. rjw180. DOI: https://doi.org/10.1093/jscr/rjw180
4. Giaretta, S., et al., Asymmetric bilateral hip dislocation in young man: a case report. Acta Biomed, 2019. 90(1-s): p. 183-186. https://doi.org/10.23750/abm.v90i1-S.8067
5. Hoffman, A. and B.C. Taylor, Asymmetric Bilateral Hip Dislocations with a Pulseless Left Lower Extremity: A Case Report. JBJS Case Connect, 2019. 9(4): p. e0479. DOI: https://doi.org/10.2106/jbjs.cc.18.00479
6. Pathinathan, K., N. Marage, and N. Fernando, Bilateral irreducible asymmetrical fracture-dislocation of the hip: A case report and literature review. Int J Surg Case Rep, 2021. 81: p. 105803. DOI: https://doi.org/10.1016/j.ijscr.2021.105803
7. Rufer, B., et al., Bilateral Hip Dislocation: An Indicator for Emergent Full-Body Computed Tomography Scan in Polytraumatized Patients? A Case Report and Review of the Literature. J Emerg Trauma Shock, 2018. 11(1): p. 53-56. DOI: https://doi.org/10.4103/jets.Jets_12_17
8. Sahito, B., et al., Bilateral asymmetrical hip dislocations with acetabulum fractures; a case report. Trauma Case Rep, 2021. 32: p. 100453. DOI: https://doi.org/10.1016/j.tcr.2021.100453
9. Buckwalter, J., B. Westerlind, and M. Karam, Asymmetric Bilateral Hip Dislocations: A Case Report and Historical Review of the Literature. Iowa Orthop J, 2015. 35: p. 70-91.
10. Lima, L.C., et al., Epidemiology of traumatic hip dislocation in patients treated in Ceará, Brazil. Acta Ortop Bras, 2014. 22(3): p. 151-4. DOI: https://doi.org/10.1590/1413-78522014220300883
11. Sahin, V., et al., Traumatic dislocation and fracture-dislocation of the hip: a long-term follow-up study. J Trauma, 2003. 54(3): p. 520-9. DOI: https://doi.org/10.1097/01.ta.0000020394.32496.52
Table 2 Association between mechanism of dislocation and dislocation type.
Mechanism of dislocation
|
Odds Ratio
|
Dislocation type
|
Total
|
Bilateral
(Number)
|
Unilateral
(Number)
|
Fall
|
2.68
|
5(2.5%)
|
2(1%)
|
7
|
Pedestrian injuries
|
1.72
|
14(7.1%)
|
9(4.5%)
|
23
|
Sport injuries
|
|
0(0%)
|
2(1%)
|
2
|
Terrafic accident
|
0.46
|
61(31.1%)
|
79(40.3%)
|
140
|
Work injuries
|
0.24
|
2(1%)
|
8(4%)
|
10
|
Weight from above
|
|
14(7.1%)
|
0(0%)
|
14
|
Total
|
96(48.9%)
|
100(51.1%)
|
196
|
Bilateral dislocation is assumed as event to calculate OR(odds ratio). P-value = 0.000197 (CI=95%)
|
Table 3. Associated fractures with asymmetrical bilateral and unilateral dislocations.
Dislocation type
|
|
Type of fracture
|
Total
|
Acetabulum
|
Femur head
|
Femur neck
|
Pelvis
|
Posterior edge
|
Asymmetrical Bilateral
|
Count
|
55
|
2
|
19
|
4
|
2
|
82
|
% within Dislocation type
|
67.1%
|
2.4%
|
23.2%
|
4.9%
|
2.4%
|
100.0%
|
% of Total
|
50.9%
|
1.9%
|
17.6%
|
3.7%
|
1.9%
|
75.9%
|
Unilateral
|
Count
|
2
|
2
|
1
|
0
|
21
|
26
|
% within Dislocation type
|
7.7%
|
7.7%
|
3.8%
|
0.0%
|
80.8%
|
100.0%
|
% of Total
|
1.9%
|
1.9%
|
0.9%
|
0.0%
|
19.4%
|
24.1%
|
Total
|
Count (Percentage)
|
57(52.8)
|
4(3.7)
|
20(18.5)
|
4(3.7)
|
23(21.3)
|
108(100)
|