Table 1: Physical characteristics and CPET results of JIA and control groups.

JIA ( )Control ( )P value

Age, year N.S.
Height, cm 0.004
Weight, kg 0.008
Rest HR, bpm N.S.
Rest VE, L/min N.S.
HRAT, bpm N.S.
VO2AT, mL/kg/min 0.050
Max HR, bpm 0.008
% Predicted HR 0.007
, mL/kg/min 0.050
Predicted VO2, % N.S.
VEpeak, L/min 0.002
RER 0.050
Exercise time, min 0.047

Abbreviations: HR: heart rate; VE: minute ventilation; AT: anaerobic threshold; Max: maximal; RER: respiratory exchange ratio; JIA: juvenile idiopathic arthritis; NS: not significant; CPET: cardiopulmonary exercise test.