Table I.

Mean radiological parameters in the acetabular dysplasia and control groups

Radiological parameter	AD group (n = 64)	Control group (n = 32)	p-value (t-test)
Sharp angle (°)	51.9 (3.5; 44.5 to 60.3)	39.5 (2.0; 34.0 to 41.6)	7.58E-33
CE angle (°)	3.1 (11.9; -24.5 to 23.9)*	32.9 (4.1; 26.1 to 42.8)	4.52E-24
ARO angle (°)	29.7 (8.0; 7.7 to 51.5)	4.5 (4.0; -3.9 to 12.0)	6.87E-30
MJSW (mm)	2.5 (1.8; 0 to 7.3)*	3.9 (0.6; 3.3 to 5.5)	8.12E-5

^*case 39 had a bilaterally high congenital dislocation of the hip and was excluded

Values on the worst side are presented as mean (sd; range)

AD, acetabular dysplasia; CE, centre edge; ARO, acetabular roof obliquity; MJSW, minimum joint space width