. 2021 Dec 14;9(12):1475. doi: 10.3390/vaccines9121475

Table 4.

Area under IgA titer curves over one month and 70 days.

70 Days	Vaccination, Uninfected	Vaccination, Previously Infected	SARS-CoV-2 Infection, Unvaccinated
df	397	17	73
AUC_G	37.6 ± 6.4 ^a	71.1 ± 8.3 ^b	38.2 ± 5.6 ^a
AUC_cutoff	7.5 ± 3.8 ^a	36 ± 8.3 ^b	5.7 ± 4.9 ^a
AUC_I	19.8 ± 6.4 ^a	12.3 ± 8.3 ^a	19.7 ± 5.6 ^a
One month
df	380	16	44
AUC_G	18.9 ± 1.8 ^a	35.2 ± 1.1 ^b	19 ± 4.3 ^a
AUC_cutoff	5.6 ± 1.6 ^a	17.7 ± 1.1 ^b	3.7 ± 4 ^a
AUC_I	10 ± 1.8 ^a	6.2 ± 1 ^a	9.8 ± 4.3 ^a

Values are in mean ± SEM. Abbreviations: SEM, standard error of the mean; df, degrees of freedom; AUC_G, area under the curve with respect to ground; AUC_cutoff, to IgA cutoff value set at 0.502; AUC_I, to increase. ^{a, b} Different superscript letters next to AUC values indicate a significant difference. Statistical significance (p < 0.05) was determined using a one-way ANOVA test.