Table 2.

Investigated features and comparisons between SRs and FTRs.

	Tot %	SRs, n (%)	FTRs, n (%)	p-Value *
Normal appearance of one or more zones	34 (2%)	28 (47%)	6 (5%)	<0.0001
A-lines	63 (37%)	39 (66%)	24 (21%)	<0.0001
B-lines	96 (56%)	38 (64%)	58 (52%)	0.1446
No additional description	28/96 (29%)	17/38 (45%)	11/58 (19%)	0.0109
Number of B lines/B lines	31/96 (32%)	13/38 (34%)	18/58 (31%)	0.8246
Semiquantitative description few, many, some/B lines	37/96 (39%)	10/38 (26%)	27/58 (47%)	0.0555
Defined, crowding/B lines	16/69 (17%)	5/38 (13%)	11/58 (19%)	0.5796
Consolidation tissue-like	56 (33%)	26 (44%)	30 (27%)	0.0264
Consolidation small, large, etc.	8/56 (14%)	5/26 (19%)	3/30 (10%)	0.4507
Consolidation measure in cm	2/56 (4%)	1/26 (4%)	1/30 (3%)	1.0000
Subpleural consolidation	13 (8%)	6 (10%)	7 (6%)	0.3750
Bronchogram	20 (12%)	12 (20%)	8 (7%)	0.0218
Bronchogram/consolidations	20/56 (36%)	12/26 (46%)	8/30 (27%)	0.1666
Atelectasis	40 (23%)	19 (32%)	21 (19%)	0.0582
Defined as minimal, initial, small, large, extended, etc.	9/40 (23%)	4/19 (21%)	5/21 (24%)	1.0000
Pneumonia	12 (7%)	11 (19%)	1 (1%)	<0.0001
Quantification	NA	NA	NA
Pneumothorax	2 (1%)	2 (3%)	0 (0)	0.1177
Effusion	69 (40%)	22 (37%)	47 (42%)	0.6239
Presence without any other specification	3/69 (4%)	3/22 (14%)	0/47 (0)	0.0294
Small, minimum, large, abundant	44/69 (64%)	10/22 (45%)	34/47 (72%)	0.0363
Measures (depth in cm or caudal extent; i.e., n° of intercostal spaces)	31/69 (42%)	11/22 (50%)	20/47 (43%)	0.6106
Estimation of volume	14/69 (20%)	13/22 (59%)	1/47 (2%)	<0.0001
Appearance/echogenicity	5/69 (7%)	0/22	5/47 (11%)	0.1694
Curtain sign	9 (5%)	2 (3%)	7 (6%)	0.7203

Values are expressed as n (%); * Fisher exact test.