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. 2021 May 12;11:10158. doi: 10.1038/s41598-021-89711-5

Table 3.

The relative risk of SARS-CoV-2-specific seropositivity by age.

Antibody negative Antibody positive OR (95% CI) p-value
6–9 years 181 (98.4%) 3 (1.6%) 1.21 (0.37–4.01) 0.7542
10–19 years 627 (99.2%) 5 (0.8%) 0.58 (0.22–1.51) 0.2674
20–49 years 2119 (98.6%) 27 (1.3%) 1 (ref)
50–64 years 1736 (99.0%) 16 (1.0%) 0.76 (0.42–1.37) 0.3576
≥ 65 years 1250 (99.4%) 8 (0.6%) 0.47 (0.21–1.03) 0.0577

OR odds ratio, CI confidence interval.