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Table 2 Data characteristics of the submaximal and maximal tests used for the evaluation of criterion validity in patients with JIA and controls

From: Measurement properties and performance of an eight-minute submaximal treadmill test in patients with juvenile idiopathic arthritis: a controlled study

  Patients with JIA (n = 59) Controls
(n = 59)
Maximal test
 VO2peak (mL∙kg−1∙min−1) 45.1 (8.5) 46.5 (8.5)
 Running distance (m) 909 (236) 968 (190)
 Peak HR (beats/min) 196 (9) 197 (7)
 Borg 6–20 18.9 (1.9) 18.5 (1.0)
 Respiratory exchange ratio 1.27 (0.12) 1.23 (0.10)
 Test time (sec) 527 (99) 554 (76)
 Speed (km/h) 8.3 (0.9) 8.5 (0.7)
 Gradient (%) 11.5 (1.7) 11.8 (1.4)
Submaximal test
 Estimated VO2peak(mL∙kg−1∙min−1) 43.6 (9.9) 44.6 (7.9)
 Walking distance (m) 751 (91) 739 (67)
 Speed (km/h) 6.2 (0.8) 6.2 (0.6)
 3 min HR (beats/min) 134 (9) 132 (9)
Borg 6–20 9.6 (2.0) 9.4 (2.2)
 8 min HR (beats/min) 163 (14) 159 (14)
Borg 6–20 13.0 (2.2) 12.4 (2.2)
  1. Numbers are mean (SD). JIA juvenile idiopathic arthritis, HR heart rate, VO2peak peak oxygen uptake