Table 1.

The average AA, FA, CA and AI were shown between the dislocated hips and the unaffected hips in unilateral DDH

Measurement	Dislocated hips		Unaffected hips		P-value
	Mean±SD	Range	Mean±SD	Range
AA	17.72 ± 3.35°	(12–26°)	12.54 ± 2.93°	(5–18°)	0.001
FA	34.66 ± 7.77°	(19–57°)	32.60 ± 8.15°	(16–48°)	0.071
CA	52.37 ± 8.37°	(36–83°)	45.14 ± 9.01°	(24–62°)	0.001
AI	33.21 ± 4.70°	(22–45°)	21.47 ± 3.60°	(14–28°)	0.001

AA acetabular anteversion, FA femoral neck anteversion, CA combined anteversion, AI acetabular index, DDH developmental dysplasia of the hip, SD standard deviation