TABLE 1.

INDIVIDUAL CLINICAL PRESENTATION

	Patient
	1†	2	3	4	5	6	7	8	9	10
Sex, age (yr)	M, 12	F, 6	F, 8	M, 9	F, 7	F, 10	M, 9	M, 9	F, 8	M, 8
Chest wall in-drawing	Severe	Mild	Mild	Moderate	Mild	Mild	Absent	Moderate	Absent	Severe
Nasal flaring	Present	Absent	Absent	Present	Absent	Absent	Absent	Absent	Absent	Present
Sat.O2* at admission, %	< 92	92–95	92–95	< 92	92–95	92–95	92–95	< 92	92–95	< 92
Oxygen dependence, d	8	< 1	< 1	3	< 1	< 1	< 1	2	< 1	4
Chest X-ray at admission	Diffuse interstitial and alveolar infiltrates	Normal	Normal	Interstitial and alveolar infiltrates	Normal	Normal	Normal	Normal	Mild interstitial infiltrates	Interstitial infiltrate

Definition of abbreviations: F = female; M = male.

^*Sat.O₂ = oxygen saturation in room air, determined with a pulse oximeter.

^†Patient who needed mechanical ventilation.