Table 3.

Comparison of the number and frequency of lung imaging findings (A) and agreement between imaging modalities (B)

A. Comparison of the number and frequency of lung imaging findings across all lung regions1
Ultrasound finding	Lung ultrasound	Chest X-Ray	p value
Normal imaging	52 (42%)	19 (15%)	0.003
Abnormal imaging
Interstitial pattern	30 (24%)	69 (56%)	0.009
Consolidation	58 (47%)	49 (40%)	0.235
Pleural effusion	0 (0%)	8 (7%)	0.765
Pneumothorax	1 (1%)	0 (0%)	0.778

B. Comparison of agreement between lung ultrasound and chest x-ray findings
Ultrasound finding	Agreement2	95% CI	Kappa Agreement	95% CI
Normal imaging	0.57 (70/123)	0.46–0.68	0.032	− 0.11 to 0.17
Abnormal imaging
Interstitial pattern	0.47 (58/123)	0.34–0.60	0.003	− 0.20 to 0.20
Consolidation	0.65 (80/123)	0.56–0.74	0.294	0.13 to 0.46
Pleural effusion	0.94 (115/123)	0.88–0.99	NA3	NA3
Pneumothorax	0.99 (122/123)	0.98–1.00	NA3	NA3

CI confidence interval

¹One hundred twenty-three observations among 32 patients

²Number of observations in agreement divided by total number of observations

³One imaging modality did not identify abnormality