Table 3 Follow-up of participants who initially received a negative test result

Initial test result negative, n

4847

2461

 Initial test result false negative, n (%)

168 (3.5)

n/a^a

 Initial test result true negative, n (%)

4697 (96.5)

n/a^a

At least one subsequent SARS-CoV-2 test registered within 14 days^b, n (%)

887 (18.3)

284 (11.5)

 Initial test result false negative, n (%)

103 (61.3)

n/a^a

 Initial test result true negative, n (%)

784 (16.8)

n/a^a

SARS-CoV-2-positive test within 14 days, n (%)

213 (4.4)

28 (1.1)

 Initial test result false negative, n (%)

93 (55.4)

n/a^a

 Initial test result true negative, n (%)

120 (2.6)

n/a^a

 Initial test result negative, n

4715^c

2392^d

  Symptomatic, n (%)

2893 (61.4)

1427 (59.7)

  Asymptomatic, n (%)

1822 (38.6)

965 (40.3)

 Initial test result false negative, n

161

n/a^a

  Symptomatic, n (%)

91 (56.5)

n/a^a

  Asymptomatic, n (%)

70 (43.5)

n/a^a

 Initial test result true negative, n

4554

n/a^a

  Symptomatic, n (%)

2802 (61.5)

n/a^a

  Asymptomatic, n (%)

1752 (38.5)

n/a^a

 SARS-CoV-2-positive test within 14 days

 Initial test result negative

-

-

  Symptomatic, n (%)

87 (3.0)

12 (0.8) ^*

  Asymptomatic, n (%)

114 (6.3)

16 (1.7) ^*

 Initial test result false negative

-

  Symptomatic, n (%)

42 (46.2)**

n/a^a

  Asymptomatic, n (%)

44 (62.9)**

n/a^a

 Initial test result true negative

-

  Symptomatic, n (%)

45 (1.6)***

n/a^a

  Asymptomatic, n (%)

70 (4.0)***

n/a^a