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Table 3 Characteristics of patients who used methotrexate (MTX) and presented adverse drug reactions (ADRs)

From: Adverse drug reactions associated with treatment in patients with chronic rheumatic diseases in childhood: a retrospective real life review of a single center cohort

Variable

ADRs of MTX (N = 398)

Yes

No

ρ*

n = 252

n = 146

 

Sex (%)

 Female

174 (63.3)

101 (36.7)

0.978

 Male

78 (63.4)

45 (36.6)

 

Age (years) – Cohort in median

  ≤ 16

236 (72.6)

89 (27.4)

<  0.001

>  16

16 (21.9)

57 (78.1)

 

Route of administration of MTX (%)

 Subcutaneous

40 (62.5)

24 (37.5)

0.882

 Oral

212 (63.5)

122 (36.5)

 

Dose of MTX (mg/kg/week)

  ≥ 0.6

175 (69.7)

76 (30.3)

0.001

  < 0.6

77 (52.4)

70 (47.6)

 

Disease (%)

 JIA

207 (68.1)

97 (31.9)

0.001

 JSLE

20 (57.1)

15 (42.9)

 

 JDM

25 (42.4)

34 (57.6)

 
  1. N - number of patients treated with MTX, JIA - juvenile idiopathic arthritis, JSLE - juvenile systemic lupus erythematosus, JDM - juvenile dermatomyositis
  2. * Chi Pearson square or Fisher’s exact. P < 0.05