True positive

n (%)

False negative

n (%)

False positive

n (%)

True negative

n (%)

Sensitivity (95% CI)

Specificity (95% CI)

NPV

Total

p-value

Age group in years

20 - 29

53 (100.0)

11 (4.8)

0 (0.0)

218 (95.2)

82.8 (71.3 - 100.0)

100 (98.3 - 100.0

95.2 (95.1 - 97.1

282

<0.001

30 - 39

8 (100.0)

5 (14.3)

0 (0.0)

30 (85.7)

61.5 (31.6 - 86.1)

100 (88.4 - 100.0)

85.7 (75.1 - 92.3)

43

<0.001*

≥40

7 (100.0)

3 (15.8)

0 (0.0)

16 (84.2)

70.0 (34.8 - 93.3)

100.0 (79.4 - 100.0)

84.2 (67.4 - 93.2

26

<0.001*

Gender

Male

49 (100.0)

11 (94.7)

0 (0.0)

151 (93.2)

81.7 (69.6 - 90.5)

100.0 (97.6 - 100.0)

93.2 (88.9 - 95.9)

211

<0.001

Female

19 (100.0)

8 (6.6)

0 (0.0)

113 (93.4)

70.4 (49.8 - 86.3)

100.0 (96.8 - 100.0)

93.4 (88.8 - 96.2)

140

<0.001

Period of test

January, 2021

37 (100.0)

14 (8.2)

0 (0.0)

156 (91.8)

72.6 (58.3 - 84.1)

100.0 (97.78 - 100.00)

98.80 (97.7 - 100.0)

207

<0.001*

March, 2021

31 (100.0)

5 (4.4)

0 (0.0)

107 (85.6)

86.1 (70.5 - 95.3)

100.0 (96.6 - 100.0)

95.5 (90.5- 97.9

144

<0.001*

Symptomatic

Yes

11 (100.0)

3 (4.8)

0 (0.0)

59 (95.2)

78.6 (49.2 - 95.3)

100.0 (93.9 - 100.0)

95.2 (87.8 - 98.2)

73

0.002*

No

57 (100.0%)

16 (7.2)

0 (0.0)

205 (92.8)

78.1 (66.9 - 86.9)

100.0 (98.2 - 100.00)

92.8 (89.3 - 95.2)

278

<0.001*