TABLE 1.

Baseline Characteristics of the RBEL Cohort

CharacteristicsIncluded (n = 206)Ranges
Age,* mo4.0 ± 3.30–13
Male, %58.7
Race/ethnicity, %
    White53.5
    Black45.5
    Other1.0
Parent marital status, %
    Single49.3
    Married46.9
    Separated/divorced3.8
Annual household income ≥$20 000, %60.6
At least 1 parent employed, %90.3
Pregnancy history
    Duration of pregnancy,* wk38.5 ± 2.128–47
    Birth weight,* kg3.19 ± 0.561.0–4.7
    Birth length,* cm77.1 ± 350.435.6–57.1
    Medical problems during pregnancy, %27.1
    Complications during delivery, %22.7
    IgE level (N = 180),* IU/mL21.6 ± 42.36.0–278
    Eosinophils (N = 153),* %1.8 ± 2.50–18
Bronchiolitis severity, index hospitalization
    Lowest O2 saturation (N = 190),* %91.6 ± 7.350–100
    Length of stay (N = 198),* d2.5 ± 2.5
    Presence of hyperexpansion on CXR (N = 131), %63.40–17
    Presence of opacities on CXR (N = 152), %75.0
  • * Values are means ± SD.