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Table 3 Median (IQR) Standard Laboratory Values and Spearman’s Correlation Coefficients for Aerobic Capacity (expressed by absolute and relative VO2 peak) (level of significance:* indicates significance < 0.05; ** indicates significance <0.01)

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

  Median (IQR) Correlation with Correlation
   Z-score VO2peak(p -value) Z-score VO2peak/kg (p -value)
ESR (mm) 8.0 (13) −0.3 (*) −0.5 (**)
CRP (mg/l) 5.5 (6) −0.2 −0.2
Thrombocytes (10.9/l) 302 (110) −0.4 (**) −0.5(**)
Haemoglobin (mmol/l) boys 8.1 (1.2) +0.0 +0.5 (*)
Haemoglobin (mmol/l) girls 7.8 (1.1) +0.3 (*) +0.2
  1. Legend: Haemoglobin boys (ref: age group 10-12 yrs: 6.6-.8.4 millimol per liter age 12–18 yrs 6.9-9.1 millimol per liter; age >18 yrs: 8.6-10.5 millimol per liter); Hemoglobin girls (ref: age 10–12 yrs 6.6-8.4 millimol per liter ; age 12–18 yrs 6.8-8.3 millimol per liter ; age >18 yrs:7.5-9.5 millimol per liter).