Model to Predict Need for Subtrochanteric Shortening Osteotomy During Total Hip Arthroplasty for Crowe Type IV Developmental Dysplasia

25 October 2020: Clinical Research

Hai-yang Ma ^CDE* , Jing-yang Sun ^BE* , Yin-qiao Du ^F , Zhi-sen Gao ^BF , Jun-min Shen ^EF , Tie-jian Li ^F , Yong-gang Zhou ^A*

DOI: 10.12659/MSM.926239

Med Sci Monit 2020; 26:e926239

Table 2 Predictive factors for SSOT use in patients with Crowe Type IV DDH according to Cox proportional hazards regression models.

Exposure	Univariate	Multivariate
Sex
0	1.0	1.0
1	5.81 (0.75,45.05) 0.0924	1.62 (0.16,16.94) 0.6849
Age	0.99 (0.96,1.02) 0.4966	0.97 (0.92,1.01) 0.1568
BMI	0.99 (0.91,1.08) 0.8180	1.04 (0.90,1.20) 0.5597
History of surgery
0	1.0	1.0
1	0.34 (0.12,0.99) 0.0479	0.41 (0.10,1.65) 0.2106
Use of cone-shaped sleeve
0	1.0	1.0
1	0.20 (0.09,0.46) 0.0001	0.18 (0.06,0.53) 0.0018
Secondary acetabulum
0	1.0	1.0
1	0.04 (0.01,0.10)	0.10 (0.03,0.33) 0.0001
H0/H1	1.33 (1.21,1.46)	1.24 (1.11,1.38) 0.0002
BMI – body mass index; DDH – developmental dysplasia of the hip; H1 – height of dislocation; H0 – height of pelvis; SSOT subtrochanteric shortening osteotomy.