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Table 3 Univariate analysis of auxiliary examination between severe group and non-severe pertussis group

From: Risk factors and prediction model of severe pertussis in infants < 12 months of age in Tianjin, China

Characteristics

Severe pertussis group (n = 63)

Non-severe pertussis (n = 189)

t/χ2/Z

P

Liver function [(n) %)]

    

 Normal

44 (69.8)

169 (89.4)

13.843

 < 0.001

 Abnormal

19 (30.2)

20 (10.6)

  

WBC (× 109/L)

22.71 (15.77, 32.69)

19.77 (15.20, 26.00)

− 1.575

0.115

Lymphocytosis (× 109/L)

15.91 (9.93, 24.14)

13.39 (9.93, 18.60)

− 1.267

0.205

HGB (g/L)

115.0 (106.0, 125.0)

116.0 (109.0, 123.0)

− 0.167

0.868

PLT (× 109/L)

523.0 (415.0, 620.0)

476.0 (371.0, 605.0)

− 1.762

0.078

LDH (U/L)

240.0 (213.0, 299.0)

245.0 (213.0, 274.0)

− 0.670

0.503

AST (U/L)

54.0 (45.0, 67.0)

54.0 (45.0, 69.0)

− 0.526

0.599

CK (U/L)

77.0 (49.0, 110.0)

98.0 (67.0, 138.0)

− 2.295

0.022

CK-MB (U/L)

38.75 (29.80, 50.70)

33.80 (26.60, 43.10)

− 2.072

0.038

C3 (g/L)

0.87 (0.76, 1.03)

0.86 (0.77, 1.01)

− 0.008

0.993

C4 (g/L)

0.19 (0.13, 0.27)

0.18 (0.14, 0.23)

− 0.788

0.431

IgG (g/L)

4.00 (2.60, 5.50)

3.90 (2.10, 5.70)

− 0.764

0.445

IgA (g/L)

0.15 (0.04, 0.34)

0.14 (0.04, 0.28)

− 0.274

0.784

IgM (g/L)

0.62 (0.44, 0.85)

0.66 (0.44, 0.90)

− 0.544

0.586

Serum ferritin (μg/L)

106.0 (56.0, 235.0)

53.0 (29.0, 109.0)

− 3.706

 < 0.001

Blood sugar (mmol/L)

5.27 ± 0.90

5.25 ± 0.72

0.250

0.803

CD3 (/L)

10,982.0 (6512.0, 17,082.0)

9156.5 (6206.5, 12,793.5)

− 1.661

0.097

CD4 (/L)

6145.5 (3781.0, 10,593.5)

5402.5 (3774.5, 7742.5)

− 1.641

0.101

CD8 (/L)

4140.0 (1860.0, 6258.0)

3160.0 (2105.0, 4624.5)

− 1.912

0.056

Co-infection [(n) %)]

    

 No

34 (54.0)

129 (68.3)

4.221

0.040

 Yes

29 (46.0)

60 (31.7)

  

Chest CT [(n) %)]

    

 Normal

5 (7.9)

49 (25.9)

22.776

 < 0.001

 Pneumonia

41 (65.1)

82 (43.4)

  

 Pulmonary consolidation/atelectasis

10 (15.9)

10 (5.3)

  

 Others

7 (11.1)

48 (25.4)

  

EEG [(n) %)]

    

 Normal

57 (90.5)

187 (98.9)

8.434

0.004

 Abnormal

6 (9.5)

2 (1.1)

  
  1. WBC white blood cell count, HGB hemoglobin, PLT platelet, LDH lactate dehydrogenase, AST aspartate aminotransferase, CK creatine kinase, CKMB creatine kinase-MB, EEG electroencephalogram
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