Table 4.

Relationship between clinical tests and alpha angle of the hip joint

	Alpha angle for bone at 1 o’clock			Alpha angle for bone at 1 o’clock for maximum value of the two hips			Alpha angle for cartilage at 1 o’clock			Alpha angle for cartilage at 1 o’clock for maximum value of the two hips
	Coefficient	95% CI	P value	Coefficient	95% CI	P value	Coefficient	95% CI	P value	Coefficient	95% CI	P value
Internal rotation	−1.10	−1.46 to −0.74	<0.001	−0.96	−1.30 to −0.62	<0.001	−1.10	−1.43 to −0.76	<0.001	−0.90	–1.25 to −0.56	<0.001
External rotation	−0.58	−1.25 to 0.94	0.089	−0.50	−1.40 to 0.40	0.259	−0.62	−1.26 to 0.03	0.06	−0.43	−1.32 to 0.44	0.312
Total rotation	−0.67	−0.95 to −0.40	<0.001	−0.64	−0.94 to −0.35	<0.001	−0.68	−0.93 to −0.42	0.000	−0.60	−0.90 to −0.30	0.001
Flexion	−0.86	−1.73 to 0.01	0.052	−0.41	−1.78 to 0.96	0.536	−0.59	−1.45 to 0.26	0.170	−0.30	−1.63 to 1.03	0.640
Extension	−1.20	−2.19 to −0.21	0.019	−1.61	−2.75 to −0.48	0.008	−1.13	−2.08 to −0.17	0.022	−1.12	−2.34 to 0.11	0.071
FADIR test	1.76	−6.91 to 10.44	0.683	−0.56	−11.57 to 10.44	0.916	−0.28	−8.66 to 8.09	0.946	−0.08	−10.71 to 10.56	0.988
FABER test	14.92	−9.83 to 39.67	0.230	12.26	−20.70 to 45.21	0.445	12.86	−11.07 to 36.80	0.284	9.34	−22.69 to 41.38	0.548

FABER, Flexion, Abduction, External Rotation; FADIR, Flexion, Adduction, Internal Rotation.