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Table 1 Descriptive characteristics of the patients with valid accelerometer data

From: Reduced physical activity in children and adolescents with Juvenile Idiopathic Arthritis despite satisfactory control of inflammation

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 %)
  1. Summary statistics: Number with percentage in brackets, mean with SD in brackets, and median with range in brackets
  2. BMI body mass index, JIA juvenile Idiopathic Arthritis, RF reumafactor
  3. aDisease duration = duration of symptoms