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Table 3 Comparison of clinical and laboratory characteristics among different pain phenotypes in patients with systemic juvenile idiopathic arthritis

From: Latent class analysis identifies distinct pain phenotypes in newly diagnosed systemic juvenile idiopathic arthritis

Variable

C1

C2

C3

χ² or F

P

Gender

Female

38 (42.7%)

12 (37.5%)

21 (47.7%)

0.799b

0.671

 

Male

51 (57.3%)

20 (62.5%)

23 (52.3%)

  

Age

 

9.88 (6.13 ~ 12.28)

9.63 (5.52 ~ 11.76)

7.75 (4.14 ~ 11.05)

6.678a

0.035

Residence

Urban

38 (42.7%)

11 (34.4%)

20 (45.5%)

1.942b

0.746

 

Town

18 (20.2%)

7 (21.9%)

11 (25.0%)

  
 

Village

33 (37.1%)

14 (43.8%)

13 (29.5%)

  

Ethnicity

Han Chinese

75(84.3)

25(78.1)

40(90.9)

2.406

0.300

 

Other Ethnic Minorities

14(15.7)

7(21.9)

4(9.1)

  

Birth Method

Vaginal

44 (49.4%)

12 (37.5%)

21 (47.7%)

2.233c

0.708

 

Caesarean

40 (44.9%)

18 (56.3%)

19 (43.29%)

  
 

Unknown

5 (5.6%)

2 (6.3%)

4 (9.1%)

  

Feeding Method

Breastfeeding

73 (82.0%)

21 (65.6%)

35 (79.5%)

5.441c

0.455

 

Formula

7 (7.9%)

3 (9.4%)

3 (6.8%)

  
 

Mixed

7 (7.9%)

7 (21.9%)

5 (11.4%)

  
 

Unknown

2 (2.2%)

1 (3.1%)

1 (2.3%)

  

Family History of Rheumatic Diseases

No

85 (95.5%)

31 (96.9%)

42 (95.5%)

0.221c

1.000

 

Yes

4 (4.5%)

1 (3.1%)

2 (4.5%)

  

Number of Outpatient Hospitals Visited

0

16 (18.0%)

2 (6.3%)

7 (15.9%)

3.848c

0.704

 

1

49 (55.1%)

20 (62.5%)

28 (63.6%)

  
 

2

20 (22.5%)

9 (28.1%)

8 (18.2%)

  
 

3

4 (4.5%)

1 (3.1%)

1 (2.3%)

  

Time from Symptom Onset to Visit (Days)

 

20.00 (11.50 ~ 30.00)

14.00 (10.00 ~ 20.75)

14.50(7.00 ~ 25.00)

6.212a

0.045

PCT

 

0.38 (0.12 ~ 1.25)

0.50 (0.23 ~ 1.25)

0.52 (0.15 ~ 1.24)

2.123a

0.346

ESR

 

58.00 (29.00 ~ 85.50)

64.00 (42.25 ~ 86.75)

75.00(42.50 ~ 98.50)

4.002a

0.135

CRP

 

68.40 (12.07 ~ 116.50)

57.95(18.33 ~ 121.75)

66.20(24.52 ~ 108.00)

0.626a

0.731

IL-10

 

4.16 (1.59 ~ 8.08)

8.16(3.94 ~ 10.17)

8.05(3.30 ~ 8.15)

17.292a

0.000

IL-6

 

44.57 (15.67 ~ 103.67)

40.54 (29.35 ~ 55.48)

45.36 (22.84 ~ 82.40)

0.686 a

0.710

TNF-α

 

0.80 (0.18 ~ 1.35)

1.23 (0.66 ~ 2.83)

1.23 (0.04 ~ 2.49)

5.731 a

0.057

  1. CRP: C-reactive protein; TNFα: tumour necrosis factor alpha; IL-10: interleukin-10; ESR: erythrocyte sedimentation rate; PCT: procalcitonin; P < 0.05: the result was statistically significant. Superscripts are defined as follows: a: Kruskal–Wallis test; b: chi-square test; c: Fisher’s exact test
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Arthritis Research & Therapy

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