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Table 3 Comparisons in socio-demographic factors and co-morbidities between cases with juvenile idiopathic arthritis (JIA) and controls

From: Epidemiology and risk of juvenile idiopathic arthritis among children with allergic diseases: a nationwide population-based study

 

Total n = 1645

non-JIA n = 1316

JIA n = 329

 

n %

n %

n %

P-value

Age (year), mean ± SDa

11.3 ± 3.47

11.3 ± 3.47

11.3 ± 3.47

0.95

Stratified age

   

0.99

 <12

645 (39.2)

516 (39.2)

129 (39.2)

 

 ≥12

1000 (60.8)

800 (60.8)

200 (60.8)

 

Sex

   

0.99

 Girls

840 (51.1)

672 (51.1)

168 (51.1)

 

 Boys

805 (48.9)

644 (48.9)

161 (48.9)

 

Urbanizationb

   

0.99

 1 (highest)

495 (30.1)

396 (30.1)

99 (30.1)

 

 2

490 (29.8)

392 (29.8)

98 (29.8)

 

 3

270 (16.4)

216 (16.4)

54 (16.4)

 

 4 (lowest)

390 (23.7)

312 (23.7)

78 (23.7)

 

Co-morbidity

    

 Allergic conjunctivitis

   

0.02

  No

1354 (82.3)

1098 (83.4)

256 (77.8)

 

  Yes

291 (17.7)

218 (16.6)

73 (22.2)

 

 Allergic rhinitis

   

0.003

  No

1226 (74.5)

1002 (76.1)

224 (68.1)

 

  Yes

419 (25.5)

314 (23.9)

105 (31.9)

 

 Asthma

   

0.06

  No

1477 (89.8)

1191 (90.5)

286 (86.9)

 

  Yes

168 (10.2)

125 (9.50)

43 (13.1)

 

 Atopic dermatitis

   

0.10

  No

1555 (94.5)

1250 (95.0)

305 (92.7)

 

  Yes

90 (5.47)

66 (5.02)

24 (7.29)

 
  1. Chi-square test
  2. a t-test
  3. bThe urbanization level was categorized by the population density of the residential area into 4 levels, with level 1 as the most urbanized and level 4 as the least urbanized