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Table 1 Demographic characteristics of patients by BMI category

From: Obesity and disease activity in juvenile idiopathic arthritis

  Obesity
(n = 28)
Overweight
(n = 19)
Healthy weight
(n = 107)
P value
Age (median, IQRa) 9, 6 - 13 10, 6 - 13 11, 7 - 15 0.23
Females % (N) 54 (15) 58 (11) 64 (68) 0.60
Ethnicity % (N)     0.42
   Caucasian 93 (26) 84 (16) 87 (93)  
   African American 0 0 4 (4)  
   Hispanic 7 (2) 16 (3) 5 (6)  
   Asian 0 0 4 (4)  
JIA subtype % (N)     0.27
   Oligoarticular 36 (10) 53 (10) 47 (51)  
   Rheumatoid factor-negative polyarticular 21 (6) 10 (2) 23 (25)  
   Rheumatoid factor-positive polyarticular 0 0 4 (4)  
   Systemic-onset 4 (1) 5 (1) 2 (2)  
   Enthesitis-related arthritis 18 (5) 26 (5) 18 (19)  
   Psoriatic arthritis 21 (6) 5 (1) 6 (6)  
Time since JIA onset in months (median, IQRa) 28, 7 - 66 34, 4 - 61 25, 5 - 68 0.90
Medications % (N)     
   Non-steroidal anti-inflammatory drugs 50 (14) 58 (11) 49 (52) 0.75
   Methotrexate 21 (6) 10 (2) 19 (20) 0.62
   Biologics 14 (4) 16 (3) 17 (18) 0.95
   Intra-articular steroids 4 (1) 0 5 (5) 0.62
   None 36 (10) 37 (7) 31 (33) 0.81
Time on medications in months (mean ± SD)     
   Non-steroidal anti-inflammatory drugs 13 ± 34 6 ± 9 10 ± 22 0.88
   Methotrexate 13 ± 42 2 ± 6 5 ± 15 0.62
   Biologics 4 ± 10 4 ± 12 3 ± 9 0.98
  1. aIQR: interquartile range