TABLE 1.

Characteristics of successfully interviewed and excluded patients.

Characteristic	Overall	Interviewed	Excluded †	p‐Value
	(n = 261)	(n = 170)	(n = 91)
Age; month, median (IQR)	7.0 (2.7–18.0)	6.2 (2.6–17.0)	10.6 (3.0–18.0)	0.069
Age group				0.056
0–11 months	152 (58.2)	107 (62.9)	45 (49.5)
12–23 months	62 (23.8)	33 (19.4)	29 (31.9)
24–59 months	47 (18.0)	30 (17.6)	17 (18.7)
Gender				0.293
Male	152 (58.2)	103 (60.6)	49 (53.8)
Female	109 (41.8)	67 (39.4)	42 (46.2)
Residence				0.759
Zhengzhou City	214 (82.0)	141 (82.9)	73 (80.2)
Outside Zhengzhou City in Henan Province	43 (16.5)	26 (15.3)	17 (18.7)
Outside Henan Province	4 (1.5)	3 (1.8)	1 (1.1)
Ward				0.034
Infant Ward	123 (47.1)	87 (51.2)	36 (39.6)
General Emergency Ward	136 (52.1)	83 (48.8)	53 (58.2)
PICU	2 (0.7)	0 (0)	2 (2.2)
Underlying condition				0.492
No	242 (92.7)	159 (93.5)	83 (91.2)
Yes ‡	19 (7.3)	11 (6.5)	8 (8.8)
Complications				>0.999
No	3 (1.1)	2 (1.2)	1 (1.1)
Yes §	258 (98.9)	168 (98.8)	90 (98.9)
Severe illness	5 (1.9)	0 (0)	5 (5.5)	0.005
Length of hospital stay; median (IQR)	6.0 (5.0–7.0)	6.0 (5.0–7.0)	6.0 (5.0–7.0)	0.964

Note: Figures are numbers of patients (%) unless stated otherwise. Characteristics are compared between patients interviewed and excluded. A p‐value of <0.05 was considered statistically significant.

Abbreviation: IQR, interquartile range; PICU, pediatric intensive care unit.

^† The reasons for exclusion include unreachable, rejecting to participate or failed to recall cost of the RSV episode.

^‡ Mainly including preterm birth, congenital heart diseases, airway dysplasia, asthma and other congenital or chronic comorbidities.

^§ Mainly including pneumonia, bronchitis, respiratory failure, hepatic function abnormality, myocardial injury, and sepsis.