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. 2021 Oct 12;9(10):1169. doi: 10.3390/vaccines9101169

Figure 1.

Figure 1

Frequencies of anti-SARS-CoV-2 antibodies according to sex and age group. (A) Pooled frequencies of anti-SARS-CoV-2 total antibodies (S1/S2) plus anti-SARS-CoV-2 IgG neutralizing antibodies (RBD-S1). Sample size by sex: male (n = 138) and female (n = 220). Sample size by age group: 21–40 (n = 35), 41–60 (n = 60), 61–80 (n = 221), and >80 (n = 42). (B) Frequencies of total anti-SARS-CoV-2 antibodies (S1/S2). Sample size by sex: male (n = 77) and female (n = 128). Sample size by age group: 21–40 (n = 20), 41–60 (n = 39), 61–80 (n = 119), and >80 (n = 27). (C) Frequencies of neutralizing IgG anti-SARS-CoV-2 (RBD-S1) antibodies. Sample size by sex: male (n = 61) and female (n = 92). Sample size by age group: 21–40 (n = 15), 41–60 (n = 21), 61–80 (n = 102), and >80 (n = 15). * Indeterminate results were not included in the statistical analysis; ** chi-square test; *** G test.