Table 1.

Disease severity score.

	Score
	0	1	2	3
Radiological findings and clinical examination	Normal	URTI	Bronchiolitis	Pneumonia
Length of hospitalization (days)	0	1–3	4–10	>10
Duration of stay in intensive care unit	No	N/A	yes	N/A
Wheezing duration (days)	0	1–3	4–7	>7
O2 saturation (%)	>95	90–95	80–90	<80
O2 supplementation (days)	0	1-2	3-4	>5
Respiratory rate	Normal	N/A	Bradypnea or tachypnea*	N/A
Heart rate	Normal	N/A	Bradycardia or tachycardia*	N/A
Length of fever (days)	0	1-2	2-3	>4

*Based on Pediatric Advanced Life Support (PALS) guidelines for respiratory rate and heart rate.