Table 3.
Geometric mean antibody titers (GMT in mili-International Units per mL), ratios between GMT from lower doses and the full dose, and corresponding 95% C.I., by vaccine group.
| Group | N | GMT | 95% CI | Ratio to reference vaccine | 95% CI of ratio |
|---|---|---|---|---|---|
| 27,476 IU | 68 | 1682.0 | 1235.6; 2289.7 | Ref | Ref |
| 10,447 IU | 51 | 2166.7 | 1457.4; 3221.1 | 1.29 | 0.79; 2.10 |
| 3013 IU | 67 | 1602.7 | 1173.2; 2189.4 | 0.95 | 0.62; 1.47 |
| 587 IU | 59 | 2394.4 | 1758.2; 3260.8 | 1.42 | 0.92; 2.20 |
| 158 IU | 50 | 1651.2 | 1144.6; 2382.1 | 0.98 | 0.61; 1.57 |
| 31 IU | 23 | 4086.6 | 2605.2; 6410.5 | 2.43 | 1.35; 4.36 |
| Total | 318 | 1949.8 | 1698.2; 2290.9 | ||
P = 0.025.