Table 3.

Merle d’Aubigné score

	Pain	Mobility	Ability to walk
0	Intense and permanent	Ankylosis with bad position of the hip	None
1	Severe even at night	No movement; pain or slight deformity	With crutches/walking device only
2	Severe when walking; prevents any activity	Flexion under 40°	With canes only
3	Tolerable with limited activity	Flexion between 40° and 60°	With one cane, less than 1 hr; very difficult without cane and with a limp
4	Mild when walking; it disappears in rest	Flexion between 60° and 80°; patients can reach his foot	A long time with a cane; short time without a cane and with a limp
5	Mild and inconstant; normal activity	Flexion between 80 and 90°; abduction of at least 15°	Without cane but with a slight limp
6	None	Flexion more than 90°; abduction to 30°	Normal