Land-Jump Performance in Patients with Juvenile Idiopathic Arthritis (JIA): A Comparison to Matched Controls

Table 1

Mean (SD) kinematic and kinetic variables for the involved sides of the JIA and Control groups. Multivariate analysis was significantly different between groups (𝐹_(9,22)=2.7, 𝑃=.027). Univariate post-hoc analysis is listed for each variable (^∗𝑃<.05).

	JIA	Control	Univariate
Kinematics—Angular ROM
Ankle (∘)	53.8	55.2	𝐹(1,30)=0.2
	(10.3)	(5.8)	𝑃=.329
Knee (∘)	^∗67.5	^∗60.5	𝐹(1,30)=6.0
	(8.8)	(7.5)	𝑃=.011
Hip (∘)	^∗41.5	^∗25.4	𝐹(1,30)=22.8
	(12.5)	(5.0)	𝑃<.001
Kinetics—Landing
Ankle Moment ((Nm/(bw*ht))*100)	^∗10.2	^∗11.3	F (1,30)=4.2
	(1.6)	(1.3)	𝑃=.024
Knee Moment ((Nm/(bw*ht))*100)	8.5	9.7	𝐹(1,30)=1.4
	(2.5)	(3.3)	𝑃=.122
Hip Moment ((Nm/(bw*ht))*100)	13.4	13.1	𝐹(1,30)=0.1
	(2.8)	(2.6)	𝑃=.380
Kinetics—Take-off
Ankle Moment ((Nm/(bw*ht))*100)	^∗9.8	^∗11.2	𝐹(1,30)=8.3
	(1.6)	(1.2)	𝑃=.004
Knee Moment ((Nm/(bw*ht))*100)	^∗7.0	^∗8.4	𝐹(1,30)=4.0
	(1.8)	(2.2)	𝑃=.028
Hip Moment ((Nm/(bw*ht))*100)	11.3	11.7	𝐹(1,30)=0.2
	(2.3)	(2.3)	𝑃=.332