Table 2.

The 6MWT and TUG test in patients and controls. Active and Inactive refer to active and inactive disease according to the PRINTO criteria. Continuous, normally distributed variables are presented as mean (SD), while continuous, not normally distributed variables are presented as median (interquartile range).

Variable	Patients			Controls, n = 59
Variable	Active, n = 29	Inactive, n = 29	Total, n = 58	Controls, n = 59
6MWD, m	563 (75)	622 (76)^**	592 (81)	649 (79)^***
HR before, BPM	83 (15)	78 (11)	80 (13)	75 (12)^*
HR directly after, BPM	139 (20)^b	142 (19)	141 (19)^a	145 (23)
HR 1 min after, BPM	113 (20)^b	112 (17)	113 (19)^a	106 (21)
Modified Borg scale, 1–7	3 (2–4)^b	2 (1–3)^*	2 (1–4)^a	2 (2–3)^c
TUG time, s	13.7 (2.2)	12.5 (1.8)^*	13.1 (2.1)	12.3 (2.0)^*

↵* p < 0.05.
↵** p < 0.01.
↵*** p < 0.001.
↵a n = 57.
↵b n = 28.
↵c n = 58. 6MWT: 6-min walk test; 6MWD: 6MW distance; TUG: timed up and go; HR: heart rate; PRINTO: Pediatric Rheumatology International Trials Organization.