Table 1.

Demographics characteristics and main CT chest findings of first and second wave.

	All (n = 480)	First wave (n = 274)	Second wave (n = 206)
Gender
Female	173 (36.04)	101 (36.86)	72 (34.95)
Male	307 (63.96)	173 (63.14)	134 (65.05)
Age, years
Mean (SD)	65.96 (14.91)	62.92 (15.48)	70 (13.10)
Median [q1–q3]	68 [56–78]	63 [53–75]	73 [60–80]
N° of GGO lobes
0	24 (5.00)	8 (2.92)	16 (7.77)
1	13 (2.71)	11 (4.01)	2 (0.97)
2	21 (4.38)	14 (5.11)	7 (3.40)
3	29 (6.04)	23 (8.39)	6 (2.91)
4	52 (10.83)	36 (13.14)	16 (7.77)
5	341 (71.04)	182 (66.42)	159 (77.18)
N° of consolidation lobes
0	78 (16.25)	31 (11.31)	47 (22.82)
1	47 (9.79)	26 (9.49)	21 (10.19)
2	112 (23.33)	56 (20.44)	56 (27.18)
3	75 (15.63)	53 (19.34)	22 (10.68)
4	59 (12.29)	45 (16.42)	14 (6.80)
5	109 (22.71)	63 (22.99)	46 (22.33)
Bilateral alteration	443 (92.29)	249 (90.88)	194 (94.17)
Pleural effusion
0	442 (92.08)	251 (91.61)	191 (92.72)
1	19 (3.96)	9 (3.28)	10 (4.85)
2	19 (3.96)	14 (5.11)	5 (2.43)
Lymph nodes	85 (17.71)	65 (23.72)	20 (9.71)
Pericardial effusion	23 (4.79)	11 (4.01)	12 (5.83)
Crazy Paving	190 (39.58)	89 (32.48)	101 (49.03)
Reverse Halo Sign	30 (6.25)	25 (9.12)	5 (2.43)
RSNA assessment
Typical	402 (83.75)	227 (82.85)	175 (84.95)
Indeterminate	34 (7.08)	28 (10.22)	6 (2.91)
Atypical	30 (6.25)	14 (5.11)	16 (7.77)
Negative	14 (2.92)	5 (1.82)	9 (4.37)