Characteristics in patients with JMCTD and controls from the general population. Values are mean (SD) or median (range) unless otherwise specified.
| Variables | Patients with JMCTD, n = 52 | Controls, n = 52 | p |
|---|---|---|---|
| Age at onset, yrs | 11.7 (3.1) | NA | |
| Age at diagnosis, yrs | 14.4 (4.4) | NA | |
| Disease duration, from onset | 16.2 (10.3) | NA | |
| Female sex, n (%) | 44 (85) | 44 (85) | 1.00 |
| BMI, kg/m2 | 22.7 (3.5) | 23.4 (3.0) | 0.239 |
| Height, cm | 166.0 (7.5) | 170.1 (8.5) | 0.016 |
| Weight, kg | 63.0 (12.1) | 68.1 (12.1) | 0.033 |
| Current smokers, n (%) | 7 (14) | 9 (17) | 0.586 |
| Never smokers, n (%) | 35 (67) | 34 (65) | 0.832 |
| Hemoglobin, g/100 ml | 13.5 (1.2) | 13.6 (1.1) | 0.809 |
| Vigorous physical activity, h/week | 2.0 (0–25) | 2.0 (0–55) | 0.400 |
| Moderate physical activity, h/week | 2.0 (0–28) | 1.2 (0–30.0) | 0.278 |
JMCTD: juvenile mixed connective tissue disease; NA: not assessed; BMI: body mass index.