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Table 2 Median values (IQR) of Disease activity markers and Spearman’s Correlation Coefficient values for Aerobic Capacity, expressed by absolute and relative VO2 peak

From: Aerobic capacity and disease activity in children, adolescents and young adults with juvenile idiopathic arthritis (JIA)

  Median (IQR) Correlation Correlation
   Z-score VO2peak Z–score VO2peak/kg
   (p -value) (p -value)
Number of swollen joints in lower extremities 0.0 (0) −0.3 (**) −0.1
number of swollen joints in upper and lower extremities 0.0 (2) −0.3 (**) −0.1
Number of painful joints lower extremities 0.0 (2) −0.1 −0.1
number of painful joints in upper and lower extremities 0.0 (4.0) −0.2 −0.1
number of limited joints in upper and lower extremities 2.0 (4.0)) −0.3 (*) −0.3 (*)
Active joint count 0.0 (0) −0.3 (**) −0.2
VAS patient 0.5 (2.6) −0.3 (*) −0.3 (*)
DAS28 1.6 (1.2) −0.4 (**) −0.4 (**)
JADAS 27 2.9 (9.0) −0.3(**) −0.4(**)
  1. level of significance:* indicates significance < 0.05; ** indicates significance <0.01.