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Table 3 Linear regression analysis between 25(OH)D levels and participant characteristics

From: Vitamin D concentrations and disease activity in Moroccan children with juvenile idiopathic arthritis

  Univariate analysis Multivariate analysis
β CI p β CI p
Age (years) −0. 32 (−1.15, 0.51) 0.4    
BMI −0.15 (−0.96, 0.65) 0.7    
Time since JIA onset (years) −0.52 (−1.74, 0.69) 0.4    
JIA subtype       
Oligoarthritis 0      
Systemic-onset arthritis −0.92 (−8.81, 6.96) 0.8    
Polyarticular forms −0.55 (−7.61, 6.50) 0.8    
CHAQ −3.28 (−7.31, 0.75) 0.1    
Patient global health (cm) −0.17 (−0.35, −0.004) 0.04 −0.6 (−0.50, 0.38) 0.7
Tender joints −0.79 (−1.47, −0.10) 0.02 −1.23 (−3.76, 1.30) 0.3
Swollen joints −0.67 (−1.78, 0.42) 0.2    
ESR (mm/h) −0.14 (−0.28, 0.004) 0.05 −0.21 (−0.66, 0.23) 0.3
DAS28 −3.87 (−7.67, −0.07) 0.04 4.02 (−0.66, 0.23) 0.6
BASDAI −1.88 (−6.40, 2.62) 0.3    
Medications used:       
NSAID 1.45 (−6.67, 9.57) 0.7    
Corticosteroid 1.08 (−6.04, 8.2) 0.7    
Methotrexate −3.63 (−10.73, 3.46) 0.3    
Sulfassalazine −0.04 (−9.91, 9.83) 0.9    
Biologics 1.56 (−11.81, 14.94) 0.81    
  1. CI: confidence interval at 95%; BMI: body mass index; DAS28: disease Activity Score in 28 joints; ESR: Erythrocyte sedimentation rate; BASDAI: Bath AS Disease Activity Index; NSAID: non-steroidal anti-inflammatory drugs; CHAQ: Childhood Health Assessment Questionnaire.