Table 4 Admission characteristics of children with Mycoplasma pneumoniae pneumonia in the validation cohort

Age (years)

4.25 (2.17 ~ 7.00)

12.00 (8.00 ~ 12.00)

< 0.001

Fever days

3.00 (1.00 ~ 4.00)

7.00 (5.00 ~ 10.00)

< 0.001

WBC (10⁹/L)

8.39 (6.19 ~ 11.92)

8.90 (6.85 ~ 11.15)

0.447

PMNs %

56.17 ± 17.62

65.37 ± 14.03

< 0.001

L %

34.11 ± 16.20

25.78 ± 12.65

< 0.001

PMNs (10⁹/L)

4.49 (2.96 ~ 6.69)

5.51 (4.17 ~ 7.97)

0.007

L(10⁹/L)

2.42 (1.78 ~ 3.67)

2.17 (1.50 ~ 3.20)

0.025

Hb (g/L)

129.11 ± 9.91

129.67 ± 10.33

0.582

PLT (10⁹/L)

312.25 ± 107.62

275.12 ± 96.86

0.001

CRP (ug/ml)

3.56 (1.07 ~ 10.23)

16.45 (4.25 ~ 28.10)

< 0.001

ALT (U/L)

14.10 (10.90 ~ 17.80)

15.00 (11.50 ~ 23.50)

0.103

AST (U/L)

33.90 (26.60 ~ 40.70)

29.00 (23.20 ~ 38.50)

0.009

LDH (U/L)

315.40 (266.60 ~ 392.00)

393.00 (285.50 ~ 530.50)

0.002

CK (U/L)

91.00 (61.30 ~ 132.00)

72.00 (46.50 ~ 131.00)

0.049

CK-MB (U/L)

23.55 (10.80 ~ 37.00)

0.86 (0.67 ~ 1.51)

< 0.001

D-d (mg/L)

0.35 (0.22 ~ 0.53)

1.28 (0.90 ~ 3.96)

< 0.001

Chest imaging score

268

84

< 0.001

 1

218(81.34%)

37(44.05%)

 2

41(15.30%)

22(26.83%)

 3

9(3.36%)

3 (3.57%)

 4

0(0.00%)

22(26.83%)