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. 2023 Jun 26;14:1188431. doi: 10.3389/fimmu.2023.1188431

Table 2.

Antibody response to vaccine antigens expressed as Geometric Mean Titer (EU/ml) of anti-GI.4 and anti-GII.4 VLP IgA at scheduled time points for each study group.

Time point
IgA Study group Parameter
95% CI
Day 1 Day 8 Day 29 Day 57 Day 183 Day 365
Anti-GI.4 rNV-2v 50 µg Geomean* 175.6 7,913.3 3,076.1 1,968.6 1,184.3 765.1
95% CI 77.6–397.2 3,802.8–1,6467.0 1,535.2–6,163.5 1,000.3–3,874.4 574.2–2,442.6 377.3–1,551.4
rNV-2v 150 µg Geomean 139.0 17,767.9 3,586.5 1,879.6 961.6 665.0
95% CI 77.9–247.8 10,800.8–29,229.3 2,260.6–5,689.9 1,183.7–2,984.7 596.8–1,549.2 410.6–1,076.9
Placebo Geomean 159.3 152.2 146.2 152.1 193.6 158.7
95% CI 76.5–331.7 74.1–312.8 304.3 70.2 74.8–309.4 97.7–383.7 75.9–331.8
Anti-GII.4 rNV-2v 50 µg Geomean 209.6 3,437.5 1,522.2 966.8 623.9 456.6
95% CI 105.5–416.2 1,996.2–5,919.6 933.5–2,482.4 587.9–1,589.7 372.1–1,046.1 268.4–776.6
rNV-2v 150 µg Geomean 140.5 5,743.1 1,205.4 695.4 489.8 362.0
95% CI 59.9–329.7 3,552.0–9,285.7 670.7–2,166.4 376.0–1,286.0 250.4–958.0 183.2–715.5
Placebo Geomean 131.3 118.6 136.7 131.8 172.9 113.7
95% CI 54.0–319.1 44.4–317.1 55.2–338.5 55.4–313.4 79.5–376.1 41.7–310.4

CI, confidence interval; Geomean, geometric mean antibody concentration.

*Geometric mean values are expressed as EU/ml (ELISA units per milliliter).