Table 5.

Range of motion values by femoral version category

Variable	Anteversion < 0.45°	Normal 0.45°-19.01°	Retroversion >19.01°	P Value
	Mean ± SD N = 8	Mean ± SD N = 61	Mean ± SD N = 7
FVMRI, deg	22.27 ± 3.31	8.99 ± 5.50	−4.88 ± 4.86	<0.01‡
Craig’s test, deg	24 ± 7	15 ± 6	8 ± 7	<0.01‡
Hip ROM
ER90°, deg*	36 ± 5	40 ± 7	39 ± 5	0.39
IR90°, deg	51 ± 8	39 ± 7	28 ± 4	<0.01‡
ER0° deg	33 ± 5	42 ± 9	45 ± 10	0.02§
IR0°, deg	43 ± 8	32 ± 8	22 ± 16	<0.01‡
Hip ROM difference†
ROMdif90° deg*	14 ± 9	0 ± 10	−10 ± 7	<0.01‡
ROMdif0°, deg	11 ± 13	−10 ± 13	−22 ± 9	<0.01§

Abbreviations: SD, standard deviation; FVMRI, femoral version as measured by magnetic resonance imaging; deg, degrees; ROM, range of motion; ER90°, external rotation ROM with hip flexed to 90°; IR90° internal rotation ROM with hip flexed to 90°; ER0°, external rotation ROM with hip in neutral flexion/extension; IR0°, internal rotation ROM with hip in neutral flexion/extension; ROMdif90°, difference in ROM with hip flexed to 90°; ROMdif0°, difference in ROM with hip in neutral flexion/extension

^*Data from one participant with chronic hip joint pain was omitted secondary to pain limiting end range of motion.

^†ROM difference was calculated by subtracting ER ROM from IR ROM

^‡Significant difference between anteversion and normal; anteversion and retroversion; normal and retroversion

^§Significant difference between anteversion and normal; anteversion and retroversion