Table 4 Factors associated with concordance or discordance between SARS-CoV-2 RT-PCR and POCUS diagnosis of SARS-CoV-2

N

58

13

23

80

Body mass index, kg/m², mean (SD)^a

29.3 (8.1)

36.5 (9.4)

25.4 (6.3)

29.1 (5.6)

Number of lung fields visualized, median (IQR)

12 (8, 12)

11 (10, 12)

11 (9, 12)

12 (10, 12)

Lung Ultrasound Score, mean (SD)

1.1 (1.6)

0.6 (0.9)

6.3 (3.2)

10.8 (4.5)

Days between symptom onset and test

 POCUS, median (IQR)

3 (2, 5)

6 (4, 8)

3 (2, 6)

9.0 (6.0, 14.0)

 RT-PCR, median (IQR)

0 (0, 0)

3.0 (0, 5)

0 (0, 1)

2 (0, 6)

Number of comorbidities, no (%)

 0

32 (55%)

7 (54%)

5 (22%)

57 (71%)

 1

19 (33%)

4 (31%)

11 (48%)

19 (24%)

 2

7 (12%)

1 (8%)

3 (13%)

4 (5%)

 3

0 (0%)

1 (8%)

4 (17%)

0 (0%)

Comorbidities, no (%)

Interstitial lung disease

0 (0%)

1 (8%)

6 (26%)

0 (0%)

 Asthma

6 (10%)

1 (8%)

2 (9%)

11 (14%)

 COPD (without severe emphysematous changes)

6 (10%)

1 (8%)

3 (13%)

2 (2%)

 Heart failure

14 (24%)

4 (31%)

13 (57%)

8 (10%)

  EF ≤ 35%

2 (3%)

1 (8%)

27 (30%)

1 (1%)

 HIV/AIDS CD4 < 200

2 (3%)

0 (0%)

2 (9%)

1 (1%)

 Immunosuppression

4 (7%)

2 (15%)

1 (4%)

3 (4%)

 ESRD

1 (2%)

0 (0%)

2 (9%)

2 (2%)