Table 3. Overall seroprevalence of IgG antibodies to SARS-CoV-2 on point-of-care testing by participant characteristics
Maccura test negative, valid participants, nMaccura test positive, valid participants, nDiagreat test negative, valid participants, nDiagreat test positive, valid participants, nSeroprevalence estimate via Maccura, %Seroprevalence estimate via Maccura, 95% CISeroprevalence estimate via Diagreat, %Seroprevalence estimate via Diagreat, 95% CI
Overall8689981210612.37.4 to 16.04.50.0 to 14.7
Sex
Female518594846212.37.1 to 16.84.90.0 to 15.9
Male350403284412.3 6.6 to 17.74.3 0.0 to 14.8
Age, years
18–34143221182616.89.1 to 25.61.30.0 to 12.8
35–4921220199209.93.8 to 16.46.00.0 to 17.1
50–64256432474218.311.8 to 25.08.50.0 to 20.3
≥6525714248185.00.0 to 10.00.00.0 to 9.2
Participant type
Patient713836748812.67.5 to 16.64.50.0 to 14.8
Healthcare worker155161381811.14.2 to 18.64.50.0 to 17.3
Administration3213112.50.0 to 16.70.00.0 to 10.6
Nursing44741817.65.9 to 33.810.70.0 to 30.6
Doctor36435412.31.5 to 29.63.00.0 to 22.3
Other healthcare staff43431510.10.6 to 24.97.70.0 to 29.2
History PCR and symptoms
Previous symptoms suggestive of SARS-CoV-2266a732577728.721.7 to 36.019.90.0 to 32.8
No previous symptoms suggestive of SARS-CoV-2601a26555293.50.0 to 6.90.00.0 to 5.7
Previous PCR nasopharyngeal swab for SARS-CoV-29939973838.527.7 to 50.626.60.0 to 43.4
No previous PCR nasopharyngeal swab for SARS-CoV-276960715688.03.1 to 11.50.60.0 to 10.8
  • aOne patient did not have a valid option recorded. PCR = polymerase chain reaction.