Table 1 Comparison between clinical characteristics of children with IgAV in recurrence and non-recurrence groups

Age (years)

6.0 (5.0, 9.0)

7.0 (5.5, 9.0)

0.357

Gender, n (%)

Male

19 (48.7)

73(47.7)

0.883

Female

20 (51.3)

81 (52.6)

Other involved systems except skin, n (%)

Joint

27(69.2)

89(57.8)

0.193

Gastrointestinal tract

21 (53.8)

21 (53.8)

0.823

Kidney

3 (7.7)

7 (4.5)

0.428

Duration of illness (d)

5 (3.0, 10.0)

3 (2.0, 5.3)

0.000

Duration of treatment (d)

6 (4.0, 8.0)

5(4.0, 7.0)

0.155

Presence of respiratory tract infection, n (%)

8 (20.5)

51 (33.1)

0.127

Use of CS, n (%)

31 (79.5)

112 (72.7)

0.389

Laboratory indices:

WBC (×10⁹/L)

9.78 (9.06, 11.04)

10.29 (7.53, 13.63)

0.508

NEU (×10⁹/L)

6.90 (5.57, 8.08)

6.71 (4.43, 10.20)

0.802

LYM (×10⁹/L)

2.30 (1.89, 2.86)

2.41 (1.76, 3.25)

0.594

PLT (×10⁹/L)

317.00 (265.00, 370.5)

311.00 (249.00, 376.00)

0.669

MPV (fl.)

10.60 (9.79, 11.10)

10.20 (9.20, 11.60)

0.417

RBC (×10¹²/L)

4.39 (4.11, 4.54)

4.50 (4.25, 4.72)

0.060

HGB (g/L)

121.00 (115.50, 128.00)

125.00 (118.00, 131.00)

0.078

CRP (mg/L)

4.60 (3.15, 14.50)

4.20 (2.00, 12.00)

0.244

NLR

2.89 (1.89, 4.35)

2.69 (1.64, 4.86)

0.728

PLR

126.52 (98.74, 172.42)

129.36 (87.05, 175.78)

0.410

MONO(×10⁹/L)

0.63 (0.42,0.77)

0.58 (0.38,0.74)

0.517

EOS(×10⁹/L)

0.08 (0.01,0.20)

0.07 (0.01,0.18)

0.872

BASO(×10⁹/L)

0.01 (0.01,0.02)

0.02 (0.01,0.03)

0.130