Table 3.
Seroprevalence of anti-HBs lower than 10 IU/L and titer according to vaccination before and after the first year of age and date of birth between 1980 and 1990 or after.
| Vaccination | n | <10 IU/L | % | χ2 | p | Titer IU/L Mean ± SD | p | Time Mean ± SD |
|---|---|---|---|---|---|---|---|---|
| before 1 year of age | 0.273 | n.s. | ||||||
| born 1980–1990 | 36 | 16 | 44.4 | 114.9 ± 254.9 | 20.1 ± 1.9 | |||
| born in 1991 or after | 5977 | 3001 | 50.2 | 49.7 ± 126.7 | =0.0023 | 19.4 ± 1.0 | ||
| after 1 year of age | 11.825 | =0.0006 | ||||||
| born 1980–1990 | 4573 | 558 | 12.2 | 308.6 ± 360.3 | 10.7 ± 3.1 | |||
| born in 1991 or after | 602 | 104 | 17.3 | 241.1 ± 325.7 | <0.0001 | 10.1 ± 3.5 |