Table 1.

The basic information of the BALF samples from the First Hospital of Jilin University.

	Control	Mild MPP	Severe MPP
	(n = 36)	(n = 84)	(n = 30)
Gender (female/male)	13/23	36/48	14/16
Median age (range), years	1.67 (0.92–10.17)	4 (0.42–13)	6 (0.92–13)
Indication of bronchoscopy
Diagnosis and remove of bronchus foreign body	22	0	0
Re-examination of bronchus foreign body	14	0	0
Diagnosis and treatment of lobar pneumonia	—	25	30
Diagnosis and treatment of segmental pneumonia	—	59	0
Timing of BALF collection
Before treatment	36	84	30
After the treatment	0	0	0

Quantitative data with a non-normal distribution are presented as median (IQR).