Table 1 Participant and bone characteristics by sex and group
|  | JIA Male (n = 7) | TD Male (n = 7) | JIA Female (n = 14) | TD Female (n = 14) | ||||
|---|---|---|---|---|---|---|---|---|
Participant Characteristics | Â | Â | Â | Â | ||||
Age (years) | 14.9 (13.3, 19.0) | 14.6 (11.8, 18.1) | 14.8 (10.7, 20.1) | 15.5 (10.1, 19.9) | ||||
Maturity offset (years from age at peak height velocity) | 1.7 (-0.2, 4.1) | 0.9 (-1.8, 3.7) | 2.4 (-1.9, 5.6) | 2.3 (-1.7, 5.3) | ||||
Weight (kg) | 61.0 (48.5, 101.5) | 51.0 (34.0, 77.0) | 50.3 (28.5, 66.0) | 52.5 (34.00, 87.0) | ||||
Height (cm) | 175.0 (160.3, 184.2) | 170.2 (144.6, 182.5) | 159.5 (133.5,175.0) | 161.8 (143.8, 175.0) | ||||
Total Body Bone Characteristics | Â | Â | Â | |||||
aBMD (g/cm2) | 1.0 (0.9, 1.2) | 0.9 (0.8, 1.2) | 1.0 (0.6, 1.1) | 1.1 (0.8, 1.2) | ||||
BMC (g) | 2070 (1381, 2963) | 1649 (1160, 2652) | 1752 (845, 2271) | 1959 (1253, 2440) | ||||
aBMD height adjusted z-score | -1.1 (-1.8, 0.3) | -0.7 (-1.3, 0.8) | -0.3 (-2.9, 1.1) | 0.1 (-0.7, 1.3) | ||||
BMC height adjusted z-score | -0.9 (-1.3, 0.2) | -0.6 (-1.5, 0.7) | -0.2 (-1.7, 0.8) | 0.3 (-0.9, 1.3) | ||||
Physical Activity and Muscle | Â | Â | Â | Â | ||||
MVPA (min/day) | 47.7 (28.4, 72.7) | 81.9 (30.1, 112.5) | 44.3 (18.1, 111.9) | 66.0 (25.7, 190.6) | ||||
TSLH (% of leg length) | 499 (336, 649) | 558 (461, 697) | 500 (333, 643) | 485 (380, 612) | ||||
Total body lean mass (kg) | 53.5 (41.0, 61.5) | 43.4 (28.4, 65.1) | 36.6 (19.9, 47.7) | 39.1 (26.1, 54.9) | ||||