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Table 1 Clinical characteristics of all patients in four cohorts:

From: RT-PCR negative COVID-19

 

N

COVID-19 patient cohorts

P1

P2

P3

PCR confirmed

Probables

Suspects

Non-Suspects

40

20

15

43

Median (IQR)

Age (years)

60.0

(43.5–65.3)

53.0

(40.5–64.5)

57.0

(47.5–62.5)

53.0

(46.5–61.0)

0.742

0.740

0.941

Median (IQR)

BMI

26.4

(24.0–32.5)

30.8

(26.0–35.0)

25.9

(24.2–32.9)

28.1

(25.0–31.4)

0.101

0.217

0.111

N (%)

Male

28 (70.0%)

13 (65.0%)

8 (53.3%)

31 (72.1%)

0.772

0.510

0.570

Median (IQR)

Days between symptom onset and RT-PCR test

6

(4–7)

3

(1–9)

1

(0–5)

NA

0.676

0.154

NA

Median (IQR)

Days between symptom onset and Ab test

11

(7–17)

14

(4–24)

14

(4–16)

NA

0.655

0.688

NA

 

Race/Ethnicity

N (%)

 Black or African American

19 (47.5%)

8 (40.0%)

8 (53.3%)

26 (60.4%)

0.735

0.809

0.318

N (%)

 Hispanic or Latino

13 (32.5%)

9 (45.0%)

5 (33.3%)

12 (28.0%)

N (%)

 Caucasian

6 (15.0%)

3 (15.0%)

2 (13.3%)

4 (9.3%)

N (%)

 Others

2 (5.0%)

0 (0.0%)

0 (0.0%)

1 (2.3%)

N (%)

Chest imaging findings consistent with COVID

26 (65.0%)

18 (90.0%)

13 (86.7%)

NA

0.061

1.00

NA

N (%)

Symptoms and risk factors

N (%)

 Fever

14 (35.0%)

8 (40.0%)

3 (20.0%)

0 (0.0%)

0.779

0.281

 < 0.001

N (%)

 Coughing

12 (30.0%)

8 (40.0%)

5 (33.0%)

0 (0.0%)

0.563

0.737

0.002

N (%)

 Dyspnea

19 (47.5%)

14 (70.0%)

11 (73.3%)

0 (0.0%)

0.168

1.00

 < 0.001

N (%)

 Chills

6 (15.0%)

4 (20.0%)

1 (6.7%)

0 (0.0%)

0.718

0.365

0.008

N (%)

 Sore throat

1 (2.5%)

1 (5.0%)

0 (0.0%)

0 (0.0%)

1.000

1.000

0.317

N (%)

 Diarrhea

4 (10.0%)

4 (20.0%)

2 (13.3%)

0 (0.0%)

0.421

0.680

0.008

N (%)

 Altered mental status

3 (7.5%)

2 (10.0%)

1 (6.7%)

0 (0.0%)

1.000

1.000

0.090

N (%)

 Known or suspected exposure

2 (5.0%)

1 (5.0%)

0 (0.0%)

0 (0.0%)

1.000

1.000

NA

 

Disease severity at admission

N (%)

 Asymptomatic

10 (25.0%)

2 (10.0%)

*3 (20.0%)

NA

0.264

0.607

NA

N (%)

 Mild-moderate

11 (27.5%)

4 (20.0%)

6 (40.0%)

NA

N (%)

 Hypoxic-no ICU

18 (45.0%)

12 (60.0%)

5 (33.3%)

NA

N (%)

 Critical-ICU

1 (2.5%)

2 (10.0%)

1 (6.7%)

NA

 

Disease severity at collection

N (%)

 Asymptomatic

8 (20.0%)

0 (0.0%)

*3 (20.0%)

NA

0.079

0.151

NA

N (%)

 Mild-moderate

14 (35.0%)

12 (60.0%)

7 (46.7%)

NA

N (%)

 Hypoxic-no ICU

16 (40.0%)

7 (35.0%)

3 (20.0%)

NA

N (%)

 Critical-ICU

2 (5.0%)

1 (5.0%)

2 (13.3%)

NA

 

Disease severity at peak

N (%)

 Asymptomatic

8 (20.0%)

0 (0.0%)

*3 (20.0%)

NA

0.039

0.209

NA

N (%)

 Mild-moderate

8 (20.0%)

4 (20.0%)

4 (26.7%)

NA

N (%)

 Hypoxic-no ICU

22 (55.0%)

12 (60.0%)

6 (40.0%)

NA

N (%)

 Critical-ICU

2 (5.0%)

4 (20.0%)

2 (13.3%)

NA

 

Chronic medical conditions

N (%)

 Hypertension

21 (52.5%)

11 (55.0%)

7 (46.7%)

25 (58.1%)

1.000

0.738

1.000

N (%)

 Heart disease

5 (12.5%)

3 (15.0%)

4 (26.7%)

10 (23.2%)

1.000

0.430

0.520

N (%)

 Diabetes

13 (32.5%)

7 (35.0%)

5 (33.3%)

10 (23.2%)

1.000

1.000

0.370

N (%)

 Liver disease

2 (5.0%)

3 (15.0%)

6 (40.0%)

2 (4.7%)

0.322

0.129

0.315

N (%)

 Lung disease

7 (17.5%)

6 (30.0%)

5 (33.3%)

5 (11.6%)

0.326

1.000

0.060

N (%)

 Kidney disease

6 (15.0%)

4 (20.0%)

5 (33.3%)

7 (16.3%)

1.000

0.246

1.000

 

Microbiology

N (%)

 Positive respiratory pathogen panel

0 (0.0%)

1 (5.0%)

0 (0.0%)

NA

0.154

1.000

NA

N (%)

 Positive sputum culture

4 (10.0%)

4 (20.0%)

2 (13.3%)

NA

0.283

0.680

N (%)

 Positive blood culture

5 (12.5%)

2 (10.0%)

2 (13.3%)

NA

0.776

1.000

N (%)

 Positive urine culture

8 (20.0%)

6 (30.0%)

6 (40.0%)

NA

0.388

0.721

 

Treatments#

N (%)

 COVID directed (any)

23 (71.8%)

7 (35.0%)

2 (16.7%)

0

0.008

0.264

NA

 

Length hospital days

Median (IQR)

 

14 (7.8–19.3)

16 (7.0–23.0)

15 (5.5–22.5)

NA

0.813

0.676

NA

 

Outcomes

N (%)

 Uninfected

NA

NA

NA

43 (100.0%)

  

NA

N (%)

 Survived

36 (90.0%)

19 (95.0%)

14 (93.3%)

NA

0.656

1.000

  1. P1 = p-value between Probables and PCR-confirmed, P2 = p-value between Probables and Suspects, P3 = p-value between Probables and Non-suspects
  2. NA not available; IQR inter quantile range; PCR polymerase chain reaction, ICU Intensive Care Unit; BMI Basal Metabolic Index
  3. *3 Suspects were asymptomatic (no documented COVID-19 symptoms) but had chest radiographic findings read as “viral/multifocal pneumonia” or “viral infection”
  4. #Denominator includes only symptomatic patients at collection (N = 32 PCR-confirmed, N = 20 Probables, N = 12 Suspects)