Table 1 General data of 82 children with RMPP

Average age (years)

5.70 ± 2.25

5.80 ± 2.58

5.18 ± 2.33

 F = 0.565

P = 0.571

Gender(male/ female)

13/11

14/14

16/14

X² = 0.105

P = 0.949

hospital stay (days)

13.33 ± 2.16

12.93 ± 2.18

12.65 ± 2.22

 F = 3.610

P = 0.032

Pulmonary imaging

Unilateral lesion of a lobe or segment

16

20

21

X² = 0.073

P = 0.964

Bilateral lesions of a certain lobe or segment

8

8

9

pleural effusion

8

9

11

X² = 0.144

P = 0.931

atelectasis

9

10

12

X² = 0.114

P = 0.944

pulmonary consolidation

1

3

4

X² = 1.317

P = 0.518

MP detection

MP-IgM Ab(+)

12

13

13

X² = 0.238

P = 0.888

MP-IgG Ab(≥ 1:160)

17

21

23

X² = 0.246

P = 0.884

MP-PCR DNA(+)

19

22

24

X² = 0.018

P = 0.991

Both two items were positive simultaneously

21

25

27

X² = 0.088

P = 0.957

Both three items were positive simultaneously

3

3

3

X² = 0.088

P = 0.957

Therapeutic drugs

Azithromycin + methylprednisolone

12

13

13

X² = 2.705

P = 0.951

Azithromycin + methylprednisolone + cefuroxime sodium injection

6

6

5

Azithromycin + methylprednisolone + ceftriaxone sodium injection

3

4

6

Azithromycin + methylprednisolone + piperacillin-tazobactam

2

4

4

Azithromycin + methylprednisolone + cefoperazone sulbactam

1

1

2

Number of BLA

One time

18

22

27

X² = 2.870

P = 0.058

Two times

4

5

2

Three times

2

1

1

Selection of bronchoscope diameter

diameter 4.0 mm

23

26

29

X² = 0.490

P = 0.783

diameter 2.8 mm

1

2

1