Table E2.
Characteristics of 774 infants hospitalized for bronchiolitis by RV category
| Characteristic | RV |
P value | |||
|---|---|---|---|---|---|
| RSV-only (n = 580) | RV-A (n = 91) | RV-B (n = 12) | RV-C (n = 91) | ||
| Age (mo), median (IQR) | 2.7 (1.5-4.8) | 3.1 (1.9-5.7) | 3.0 (2.1-4.7) | 4.4 (2.3-7.4) | <.001 |
| Female sex | 249 (42.9) | 30 (33.0) | 6 (50.0) | 27 (29.7) | .04 |
| Race/ethnicity | .38 | ||||
| Non-Hispanic white | 267 (46.0) | 33 (36.3) | 5 (41.7) | 36 (39.6) | |
| Non-Hispanic black | 126 (21.7) | 20 (22.0) | 4 (33.3) | 26 (28.6) | |
| Hispanic | 162 (27.9) | 36 (39.6) | 3 (25.0) | 25 (27.5) | |
| Other | 25 (4.3) | 2 (2.2) | 0 (0) | 4 (4.4) | |
| Parental history of asthma | 190 (32.8) | 35 (38.5) | 4 (33.3) | 35 (38.5) | .54 |
| Maternal smoking during pregnancy | 84 (14.5) | 14 (15.4) | 1 (8.3) | 13 (14.3) | .48 |
| C-section delivery | 214 (36.9) | 25 (27.5) | 3 (25.0) | 34 (37.4) | .07 |
| Prematurity (32-37 wk) | 104 (17.9) | 18 (19.8) | 1 (8.3) | 21 (23.1) | .51 |
| Low birth weight (<2.3 kg) | 33 (5.7) | 8 (8.8) | 0 (0) | 8 (8.8) | .58 |
| Sibling in the household | 457 (78.8) | 80 (87.9) | 12 (100) | 67 (73.6) | .03 |
| Mostly breast-fed during the first 3 mo of life | 248 (42.8) | 37 (40.7) | 7 (58.3) | 33 (36.3) | .57 |
| History of a breathing problem | 76 (13.1) | 21 (23.1) | 2 (16.7) | 31 (34.1) | <.001 |
| Lifetime history of systemic antibiotic use | 153 (26.4) | 27 (29.7) | 3 (25.0) | 32 (35.2) | .36 |
| Lifetime history of corticosteroid use | 62 (10.7) | 11 (12.1) | 3 (25.0) | 21 (23.1) | .005 |
| Detected pathogens | |||||
| RSV | 580 (100) | 52 (57.1) | 10 (83.3) | 47 (51.6) | <.001 |
| RV | 0 (0) | 91 (100) | 12 (100.0) | 91 (100) | <.001 |
| Other pathogen∗ | 0 (0) | 22 (24.2) | 2 (16.7) | 24 (26.4) | <.001 |
| Clinical outcomes | |||||
| Intensive care therapy† | 93 (16.0) | 13 (14.3) | 3 (25.0) | 13 (14.3) | .78 |
| Hospital length of stay (d), median (IQR) | 2.0 (1.0-3.0) | 2.0 (1.0-3.0) | 1.5 (1.0-3.3) | 2.0 (1.0-2.5) | .09 |
IQR, Interquartile range.
Data are n (%) of infants unless otherwise indicated.
∗
Adenovirus, bocavirus, Bordetella pertussis, enterovirus, human coronavirus NL63, OC43, 229E, or HKU1, human metapneumovirus, influenza A or B virus, Mycoplasma pneumoniae, parainfluenza virus 3.
†
Defined as admission to intensive care unit or use of mechanical ventilation (continuous positive airway pressure or intubation).