Table 1.
Child characteristics of the child cohort, by bronchiolitis outcome (n = 5407)
| Child characteristics | Inpatient bronchiolitis (n = 125) n (%) |
No inpatient bronchiolitis (n = 5282) n (%) |
p-value |
|---|---|---|---|
|
| |||
| Median age (months) at diagnosis of bronchiolitis (IQR) | 3.9 (1.9–7.9) | – | – |
| Male sex | 82 (65.6) | 2737 (51.8) | 0.002 |
| Race/Ethnicity | 0.050 | ||
| White | 56 (44.8) | 2928 (55.4) | |
| Black | 11 (8.8) | 274 (5.2) | |
| Hispanic | 20 (16.0) | 614 (11.6) | |
| Other | 38 (30.4) | 1466 (27.8) | |
| Insurance status* | 0.007 | ||
| Private | 63 (50.4) | 3330 (63.0) | |
| Public | 59 (47.2) | 1770 (33.5) | |
| Other | 3 (2.4) | 182 (3.5) | |
| Gestational age, weeks | 0.002 | ||
| <32 | 7 (5.6) | 58 (1.1) | |
| 32–36 | 8 (6.4) | 388 (7.4) | |
| ≥37 | 110 (88.0) | 4836 (91.6) | |
| Birth weight, g | 0.04 | ||
| <2000 | 7 (5.6) | 119 (2.3) | |
| 2000–3999 | 100 (80) | 4522 (85.6) | |
| ≥4000 | 18 (14.4) | 641 (12.1) | |
| Multiple gestation | 5 (4) | 233 (4.4) | 1.00 |
| Season of birth | <0.001 | ||
| Fall | 43 (34.4) | 1215 (23.0) | |
| Winter | 39 (31.2) | 1216 (23.0) | |
| Spring | 26 (20.8) | 1501 (28.4) | |
| Summer | 17 (13.6) | 1350 (25.6) | |
| Infant disposition at birth | <0.001 | ||
| NICU | 18 (14.4) | 251 (4.8) | |
| Nursery/NICU triage | 72 (57.6) | 3642 (69.0) | |
| Unknown | 35 (28) | 1389 (26.3) | |
| Transient tachypnea of the newborn | 9 (7.2) | 244 (4.6) | 0.18 |
| Atopic dermatitis before age 1 year† | 18 (14.4) | 319 (6.0) | <0.001 |
| Congenital heart disease | 21 (16.8) | 133 (2.5) | <0.001 |
| Cystic fibrosis | 5 (4) | 65 (1.2) | 0.02 |
| Congenital anomaly of the respiratory system | 3 (2.4) | 33 (0.6) | 0.050 |
| Immunodeficiency | 3 (2.4) | 32 (0.6) | 0.046 |
IQR, interquartile range; NICU, neonatal intensive care unit.
*
At birth.
†
n = 5406.