Table 1.

Clinical score

Clinical score	0	1	2	3
Respiratory rate	<50	50 - 60	61-69	>70
Dyspnea	Normal feeding	Difficulty feeding	2 of the following: difficulty feeding, pallor, perioral cyanosis OR agitation.	2 of the following: cyanosis, stopped feeding OR drowsiness.
Use of accessory respiratory muscles	None	Subcostal or intercostal retractions	2 of the following: subcostal, intercostal, substernal retractions OR nasal flaring	3 of the following: subcostal, intercostal, substernal, suprasternal, supraclavicular retractions OR nasal flaring
Auscultation	Normal breathing	End-expiratory wheeze only OR crackles.	Expiratory wheeze and/or crackles	Inspiratory and expiratory wheeze OR diminished breath sounds OR both