From: Frequency of pleural effusion in acute bronchiolitis and its effect on prognosisFrequenza di versamento pleurico nella bronchiolite acuta e suoi effetti sulla prognosi
Bronchiolitis score
Mild-moderate
Severe
Total
USG finding
Positive
26 (76.5%)
8 (23.5%)
34 (100%)
Negative
26 (74.3%)
9 (25.7%)
35 (100%)
52 (75.4%)
17 (24.6%)
59 (100%)
χ2 = 0.044, p = 0.52.