Table. Comparison between the group of children admitted to PICU with severe RSV disease and the group of children with mild RSV disease.

Characteristic	PICUa	Non PICUa	Statistical comparison (p value)
Median age (range)	7 wk (2 wk–21 mo)	54 wk (10 d–4 y)	0.025b
Prematurity (%)	5/23 (21.7)	3/23 (13.0)	> 0.1c
RSVd PCR/DFAe (%)	21/23 (91.3)	23/23 (100)	0.244c
Hospitalized (%)	23/23 (100)	8/23 (34.8)	0.004c
Median CSSf (range)	5 (3–6)	1 (0–4)	< 0.001b
PPVg (%)	17/23 (73.9)	0/23 (0)	NDh
RSV/HMPVi co-infection	0/23 (0)	0/23 (0)	1.0

^aPICU, pediatric intensive care unit.
^bχ2 test.
^cWilcoxon rank sum test.
^dRSV, respiratory syncytial virus.
^eDFA, direct fluorescent antibody screen.
^fCCS, clinical severity score.
^gPPV, positive pressure ventilation.
^hND, non-comparable because patients requiring PPV are admitted to the PICU.
ⁱHMPV, human metapneumovirus.