Effect of trochanter displacement on impingement and bone contact in total hip arthroplasty performed after curved intertrochanteric varus osteotomy for osteonecrosis of the femoral head: a simulation study

Table 2 Range of motion, type of impingement, and radiographic characteristics

	CVO group (38 hips)	Control group (30 hips)	p value
Range of motion (degree)
Flex	119.0 [113.3–124.8]	114.0 [110.3–121.0]]	0.238^a
IR	33.5 [27.3–41.0]	35.0 [29.5–39.8]	0.617^a
ER	19.0 [4.0–28.8]	38.0 [36.0–41.8]	< 0.001^a
Ab	23.0 [8.5–38.8]	56.0 [50.3–60.0]	< 0.001^a
Impingement type (n, bony/implant)
Flex	38/0	30/0	-
IR	31/7	29/1	0.058^b
ER	26/12	13/17	0.033^b
Ab	30/8	10/20	< 0.001^b
GT width (cm)	42.9 [38.8–46.4]	40.2 [37.2–44.8]	0.137^a
GLT angle (degrees)	83.2 [79.6–86.9]	93.4 [88.2–95.8]	< 0.001^a

Values are presented as medians [interquartile range]
CVO Curved intertrochanteric varus osteotomy, Flex Flexion, IR Internal rotation, ER External rotation, b abduction, GT Width, greater trochanter width, GLT Angle, greater and lesser trochanter angle
^aMann–Whitney U test
^bFisher's exact test

ISSN: 1471-2474