Characteristic | |
---|---|
Race,% | |
White | 100 |
Gender,% | |
Male | 48 |
Female | 52 |
Age at enrollment | |
≤6 mo,% | 52 |
<12 mo,% | 73 |
Mean (SD), mo | 8.2 (6.3) |
Median (range), mo | 6.0 (<1 − 24.0) |
Mean (SD) birth weight, kg | 2.14 (1.02) |
Mean (SD) gestational age, wk | 33.4 (5.1) |
Medical history,% | |
Pulmonary* | 68 |
Respiratory distress syndrome/BPD | 52 |
Pneumonia | 25 |
Bronchitis/bronchiolitis | 15 |
Asthma/reactive airway disease | 8 |
RSV-related LRTI | 1 |
Cardiovascular | 61 |
Murmur | 42 |
Pathologic | 30 |
Functional | 12 |
Congenital heart disease | 41 |
Acyanotic | 28 |
Cyanotic | 13 |
Pulmonary hypertension | 10 |
Congestive heart failure | 7 |
Cardiac arrhythmia | 1 |
Hospitalized at birth in intensive/critical care unit,% | 67 |
Hospitalized after birth, prior to study enrollment,% | 64 |