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Table 2 Laboratory tests

From: Rapid point-of-care detection of SARS-CoV-2 infection in exhaled breath using ion mobility spectrometry: a pilot study

 

Unit

SARS-CoV-2 PCR negative

SARS-CoV-2 PCR positive

pU

value

N

Mean (SD)

Median (Q1…Q3)

N

Mean (SD)

Median (Q1…Q3)

Procalcitonin

ng/mL

50

2.99 (6.45)

0.40 (0.18 … 2.42)

47

0.78 (3.62)

0.10 (0.10 … 0.20)

< 0.001

C-reactive protein

mg/dL

192

6.64 (7.93)

3.10 (0.62…10.65)

185

5.48 (6.25)

3.10 (1.10…8.10)

0.777

Lactate

dehydrogenase

U/L

163

304.1 (151.5)

272.0 (218.0…341.0)

163

310.1 (109.0)

284.0 (237.0…365.0)

0.121

D-dimer

mg/L

85

4.03 (8.10)

1.06 (0.43…3.01)

155

1.35 (2.86)

0.69 (0.42 … 1.19)

0.002

Absolute lymphocyte count

G/L

107

1.13 (1.13)

0.97 (0.52 … 1.34)

172

4.27 (42.63)

0.94 (0.66 … 1.24)

0.622

SpO2

%

181

95.4 (14.2)

96.0 (94.0 … 98.0)

172

95.0 (3.7)

95.0 (94.0 … 98.0)

0.167

  1. Laboratory tests for PCR-negative and PCR-positive groups. Statistical significance was assessed by Mann–Whitney U test
  2. SpO2, peripheral oxygen saturation; SD, standard deviation; Q1, first quartile; Q3, third quartile; pU Mann–Whitney U test