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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.