Table 2.

Muscle strength, joint range of motion and previous orthopaedic surgery in all participants

Group	Child	Sideb	Muscle strength grading according to a 0–5 scalea							Joint range of motion (°)				Orthopaedic surgery
			Hip			Knee		Ankle		Hipc	Kneed		Anklee
			Flex	Ext	Abd	Flex	Ext	Dors	Plant	Ext	Flex	Ext	Dors
			L/R	L/R	L/R	L/R	L/R	L/R	L/R	L/R	L/R	L/R	L/R
1	1	L	4/3	3/4	4/4	4/3	2/3	0/0	0/0	0/0	130/50	−15/0	−20/−20	Bi hip, bi ankle
	2	R	3/3	4/4	4/4	4/4	3/3	0/0	0/0	−10/−20	60/60	−30/−25	−20/−15	Bi knee, bi ankle
	3	R	3/3	4/3	4/3	2/3	2/2	0/0	0/0	0/0	100/110	0/−20	−15/−15	Bi knee, bi ankle
	4	L	4/4	4/4	3/4	3/4	4/4	0/0	0/0	0/0	100/100	−30/−25	10/0	Bi kneef, bi ankle
2	5	R	4/4	4/4	4/3	4/4	4/4	4/3	4/3	0/0	130/130	+20/−10	20/−15	R anklef
	6	R	4/4	4/4	4/4	4/4	4/4	4/4	4/4	0/0	150/150	+20/+20	0/10	–
	7	L	4/4	4/4	4/4	4/4	4/4	4/4	3/4	0/0	130/140	+15/+15	0/0	Bi hip, L ankle
	8	R	4/4	4/4	4/4	4/4	4/4	4/4	3/3	0/0	150/150	+10/+10	15/20	Bi ankle
	9	L	4/4	4/4	4/4	4/4	4/4	0/4	0/3	0/0	140/140	−10/+10	−20/5	Bi ankle
	10	R	4/4	4/4	3/3	3/2	4/4	0/0	0/0	0/0	60/60	−10/−10	−20/−20	L hip, bi ankle
	11	L	4/4	4/4	4/4	4/4	4/4	2/2	2/2	0/0	40/110	+5/0	0/0	L hip, bi ankle
	12	L	4/4	4/4	4/4	4/4	4/4	4/4	4/4	0/0	140/140	0/0	−20/0	Bi ankle
3	13	R	4/4	4/4	4/4	4/4	4/4	4/4	4/4	0/0	120/20	+5/+10	5/10	Bi hip
	14	L	4/4	4/4	3/3	4/4	4/4	4/4	4/4	−20/−15	140/140	+10/+15	−15/−10	Bi hip, bi ankle
	15	R	4/4	4/4	4/4	4/4	4/4	4/4	4/4	0/0	155/155	+15/+15	15/10	R hipf

Flex flexion; Ext extension; Abd abduction; Dors dorsiflexion; Plant plantarflexion; L left; R right; bi bilaterally

^aMuscle strength grade <4 was not applied in this study

^bSelected side for data analysis

^c0 indicates neutral joint position and − indicates <0

^dFlexion indicates joint angle from 0 to full knee flexion range (140°), extension indicates <0 (−) and >0 (+)

^e0 indicates neutral joint position and − indicates <0

^fSoft tissue surgery