TABLE 1

Demographic and Clinical Characteristics of Children Younger than 24 Months Presenting in ED with Lower Respiratory Tract Infection

CharacteristicOverall, n (%)Age <12 mo, n (%)Age 12–23 mo, n (%)P
Site
    A1173 (19.0)134 (20.0)39 (15.0)
    A2132 (14.0)87 (13.0)45 (18.0)
    B155 (6.0)48 (7.1)7 (3.0)
    B2107 (12.0)71 (11.0)36 (14.0)
    C194 (10.0)60 (8.9)34 (13.0)
    C2144 (16.0)116 (17.0)28 (11.0)
    D1108 (12.0)85 (13.0)23 (9.1)
    D2115 (12.0)75 (11.0)40 (16.0)<.001
Age, mo
    <12676 (73.0)676 (100.0)0 (0.0)
    12–23252 (27.0)0 (0.0)252 (100.0)
Gender
    Female392 (42.0)287 (42.0)105 (42.0)
    Male536 (58.0)389 (58.0)147 (58.0).830
Race/ethnicity
    White269 (29.0)208 (31.0)61 (24.0)
    Black226 (24.0)152 (22.0)74 (29.0)
    Other52 (5.6)35 (5.2)17 (6.7)
    Hispanic357 (38.0)262 (39.0)95 (38.0)
    Not documented24 (2.6)19 (2.8)5 (2.0).011
Insurance provider at index visit
    Private240 (26.0)178 (26.0)62 (25.0)
    Medicaid603 (65.0)436 (65.0)167 (66.0)
    Other public10 (1.1)8 (1.2)2 (0.8)
    None75 (8.1)54 (8.0)21 (8.3).920
Primary ED or hospital diagnosis at index visit
    RSV41 (4.4)31 (4.6)10 (4.0)
    Bronchiolitis624 (67.0)507 (75.0)117 (46.0)
    Viral pneumonia20 (2.2)9 (1.3)11 (4.4)
    Asthma114 (12.0)41 (6.1)73 (29.0)
    Cough77 (8.3)60 (8.9)17 (6.7)
    Wheezing52 (5.6)28 (4.1)24 (10.0)<.001
History of eczema
    No124 (13.0)102 (15.0)22 (8.7)
    Yes45 (4.9)29 (4.3)16 (6.3)
    Not documented759 (82.0)545 (81.0)214 (85.0).023
History of wheezing
    No151 (16.0)114 (17.0)37 (15.0)
    Yes277 (30.0)165 (24.0)112 (44.0)
    Not documented500 (54.0)397 (59.0)103 (41.0)<.001
Wheeze during index visit
    No353 (38.0)273 (40.0)80 (32.0)
    Yes572 (62.0)400 (59.0)172 (68.0)
    Not documented3 (0.3)3 (0.4)0 (0.0).030
Eosinophil values ≥4%
    No439 (47).0319 (47.0)120 (48.0)
    Yes23 (2.5)19 (2.8)4 (1.6)
    Not documented466 (50.0)338 (50.0)128 (51.0).570
Previous use of corticosteroids (before index visit)
    No626 (67.0)500 (74.0)126 (50.0)
    Yes80 (9.0)43 (6.0)37 (15.0)
    Not documented222 (24.0)133 (20.0)89 (35.0)<.001
Corticosteroid treatment at index visit
    No646 (70.0)510 (75.0)136 (54.0)
    Yes281 (30.0)166 (25.0)115 (46.0)
    Inhaled15 (5.3)13 (7.8)2 (1.7)
    Oral266 (95.0)153 (92.0)113 (98.0)
    Not documented1 (0.1)0 (0.0)1 (0.4)<.001
Parental history of asthma
    No195 (21.0)153 (23.0)42 (17.0)
    Yes165 (18.0)115 (17.0)50 (20.0)
    Not documented568 (61.0)408 (60.0)160 (63.0).120