Table 1.

Clinical characteristics of 1715 infants hospitalized with acute viral bronchiolitis.

Clinical Characteristic	N (%)
Age (months) *	5.5 ± 6.7
Male	984 (57%)
Prematurity	212 (12%)
Temperature > 38 °C	866 (51%)
Fever duration (days) *	2.7 ± 2.2
Highest temperature (°C) *	38.6 ± 0.5
Hypoxia (SatO2 < 95%)	1156 (67%)
Hypoxia duration (days) *	3.2 ± 2.5
Length hospital stay (days) *	4.5 ± 2.9
Abnormal chest radiograph	415 (24%)
Antibiotic treatment	229 (13%)
PICU admission	68 (4%)
Leucocytes (cells/mm3)	13,446 ± 9533
Serum C reactive protein (mg/L) *	26.6 ± 39.0

* mean ± standard deviation. PICU: pediatric intensive care unit.