Effects of acute exercise on circulating endothelial and progenitor cells in children and adolescents with juvenile idiopathic arthritis and healthy controls: a pilot study

Table 2 Participant characteristics by group

	JIA	Control	Mean difference (Lower, Upper 95 % CI)	P value	Effect size
N (Males)	7 (3)	6 (1)	n/a	n/a	n/a
Age (years)	13.4 ± 2.6	14.0 ± 2.3	−0.6 (-3.8, 2.6)	0.67	0.26
Height (cm)	157.5 ± 15.0	162.1 ± 5.2	−4.6 (-20.4, 11.1)	0.53	0.88
Weight (kg)	56.0 ± 16.7	50.1 ± 7.1	5.9 (-11.9, 23.8)	0.48	0.83
\( \dot{V}{O}_{2\mathrm{peak}} \) (ml/kg/min)	45.6 ± 11.4	57.9 ± 8.3	−12.4 (-25.7, 1.0)	0.07	1.48
W _peak (W/kg)	3.0 ± 1.0	3.5 ± 0.5	−0.4 (-1.5, 0.7)	0.43	1.00
MVPA (min/d)	35.7 ± 13.0	26.1 ± 9.7	9.6 (-6.3, 25.5)	0.21	0.99
MVPA (min/hr wear time)	4.4 ± 2.0	3.8 ± 1.9	0.6 (-2.0, 3.3)	0.61	0.32

\( \dot{\mathrm{V}}{\mathrm{O}}_{2\mathrm{peak}} \) maximal volume of oxygen consumed over 30-sec during the aerobic fitness test, W _peak peak workload achieved during the aerobic fitness test, MVPA moderate-to-vigorous physical activity. Mean difference calculated as JIA – control. Statistical significance set at p ≤ 0.05

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