Table 2 Univariate associations between clinical features and RT-PCR status.

From: Practical clinical and radiological models to diagnose COVID-19 based on a multicentric teleradiological emergency chest CT cohort

Variables

RT-PCR − §

RT-PCR + §

p value

Time since the onset of symptoms

 < 1 week

148/240 (61.7%)

115/223 (51.6%)

0.02*

1–2 weeks

80/240 (33.3%)

102/223 (45.7%)

0.04*

 > 2 weeks

12/240 (5%)

6/223 (2.7%)

0.3

Dyspnea

No

56/269 (20.8%)

38/244 (15.6%)

0.16

Yes

213/269 (79.2%)

206/244 (84.4%)

 

Oxygen saturation

 ≥ 95%

77/195 (39.5%)

54/191 (28.3%)

0.006*

90–95%

82/195 (42.1%)

77/191 (40.3%)

0.03*

 < 90%

36/195 (18.5%)

60/191 (31.4%)

0.005**

Cough

No

85/269 (31.6%)

53/244 (21.7%)

0.02*

Yes

184/269 (68.4%)

191/244 (78.3%)

 

Fever (≥ 38 °C)

No

109/269 (40.5%)

34/244 (13.9%)

 < 0.001***

Yes

160/269 (59.5%)

210/244 (86.1%)

 

Asthenia

No

125/269 (46.5%)

78/244 (32%)

0.001**

Yes

144/269 (53.5%)

166/244 (68%)

 

Myalgia

No

211/269 (78.4%)

165/244 (67.6%)

0.008*

Yes

58/269 (21.6%)

79/244 (32.4%)

 

Headache

No

228/269 (84.8%)

200/244 (82%)

0.5

Yes

41/269 (15.2%)

44/244 (18%)

 

Ear, nose throat symptoms

No

247/269 (91.8%)

228/244 (93.4%)

0.6

Yes

22/269 (8.2%)

16/244 (6.6%)

 
  1. P-values in bold correspond to significant associations between clinical features and RT-PCR status. Regarding variables with more than two levels, the p value in italics corresponds to the p-value considering all its levels. The p-values below are based on the Fisher or X2 test for this variable that was dichotomized according to the level of the line.
  2. §Data refer to number of patients with percentage in parentheses.
  3. *p < 0.05, **p < 0.005, ***p < 0.001 (corresponds to X2 or Fisher test).
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