A propensity score-matched analysis between patients with high hip dislocation after childhood pyogenic infection and Crowe IV developmental dysplasia of the hip in total hip arthroplasty with subtrochanteric shortening osteotomy

Table 2 Component information and surgical characteristics

Variable	HDACI (n = 29)	DDH (n = 29)	P value
Cup diameter (mm)			0.793
38	1	0
40	3	2
42	1	2
44	12	12
46	3	7
48	6	4
50	0	0
52	3	2
Head diameter (mm)			0.758
22	5	5
28	15	18
32	6	5
36	3	1
Types of bearing surface (no. of hips)			0.913
Ceramic-on-ceramic bearing	18	18
Ceramic-on-polyethylene bearing	5	6
Metal-on-polyethylene bearing	6	5
Length of femoral resection (cm)	2.8 ± 0.9	3.0 ± 1.2	0.396
Operation time (min)	157.6 ± 24.2	146.1 ± 27.3	0.095
Perioperative blood loss (mL)	457 ± 170	382 ± 166	0.094

HDACI high dislocation after childhood infection, DDH developmental dysplasia of the hip

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