Table 1 –

Characteristics of included patient admissions

Category	Total n=86
Age months, median(IQR)	33.5 (7.0–103.0)
Age category, n(%)
1 month–<2 years	39 (45%)
2–5 years	16 (19%)
6–12 years	19 (22%)
13–<18 years	12 (14%)
Gender=male, n(%)	46 (53%)
Race, n(%)
White	43 (50%)
Black or African American	20 (23%)
Other/Mixed/Unspecified	16 (19%)
Hispanic or Latino	7 (8%)
Weight category, n(%) (among n=47 ≥2 yrs old)
Normal/underweight	22 (47%)
Overweight	5 (11%)
Obese	20 (43%)
Tracheostomy tube in place	11 (13%)
Risk of mortality (probability of death) on admission, mean (SD)
PIM 3	15.3 (27.3)
PRISM-III	16.6 (28.5)
Primary Cause of pARDS, n(%)
Respiratory	49 (57%)
Systemic	37 (43%)
Initial pARDS hypoxia criterion met n(%)
Invasive Ventilation
Oxygenation Saturation Index (OSI)	55 (64%)
Oxygenation Index (OI)	28 (33%)
Non-invasive Ventilation
PaO2: FIO2 (P:F) ratio	2 (2%)
Saturation: FIO2 (S:F) ratio	1 (1%)
Initial pARDS Severity
Mild	36 (42%)
Moderate	19 (22%)
Severe	28 (33%)
Not applicable (non-invasive ventilation)	3 (3%)
Year of Admission
2016	40 (47)
2017	19 (22)
2018	27 (31)