Table 1.
Descriptive characteristics of the patients with valid accelerometer data
| Total number | 133 |
| Females/males | 99 (74 %)/34 (26 %) |
| Age (years) | Mean 14.0 (SD 3.37) |
| Height (m) | Mean 1.58 (SD 0.14) |
| Weight (kg) | Mean 51.2 (SD 15.2) |
| BMI (kg/m2) | Mean 20.1 (SD 3.93) |
| JIA subgroup: | |
| Systemic | 4 (3 %) |
| Persisting Oligoarticular | 38 (29 %) |
| Polyarticular, RF negative | 41 (31 %) |
| Polyarticular, RF positive | 3 (2 %) |
| Psoriasis associated | 15 (11 %) |
| Enthesitis associated | 31 (23 %) |
| Undifferentiated | 1 (1 %) |
| Treatment: | |
| Methotrexate | 31 (23 %) |
| Biologics | 86 (65 %) |
| Only intra-articular injections | 11 (8 %) |
| None | 5 (4 %) |
| Disease durationa in years | Mean 5.72 (SD 3.43) |
| Remission, still on medication | 20 (15 %) |
| Remission, off medication | 3 (2 %) |
Summary statistics: Number with percentage in brackets, mean with SD in brackets, and median with range in brackets
BMI body mass index, JIA juvenile Idiopathic Arthritis, RF reumafactor
aDisease duration = duration of symptoms