Table 1 Distribution of seroprotection against diphtheria in the Polish population according to age group
From: Seroprevalence of diphtheria toxoid IgG antibodies in children, adolescents and adults in Poland
Age groups | ≤18 years | >18 years | Total |
|---|---|---|---|
Number of persons | 417 | 970 | 1387 |
Titre < 0.1 IU/ml | 154 (36.9%) | 393 (40.5%) | 547 (39.4%) |
Titre 0.1-1.0 IU/ml | 212 (50.8%) | 542 (55.9%) | 754 (54.4%) |
Titre >1-1.5 IU/ml | 30 (7.2%) | 26 (2.7%) | 56 (4.0%) |
Titre >1.5-2 IU/ml | 18 (4.3%) | 6 (0.6%) | 24 (1.7%) |
Titre > 2.0 IU/ml | 3 (0.7%) | 3 (0.3%) | 6 (0.4%) |
Arithmetic mean titre (IU/ml) | 0.409 | 0.274 | 0.310 |
Standard deviation (IU/ml) | 0.559 | 0.324 | 0.414 |
Geometric mean titre (IU/ml) | 0.141 | 0.102 | 0.108 |
Minimum (IU/ml) | 0.001 | 0.001 | 0.001 |
Maximum (IU/ml) | 4.480 | 1.740 | 4.480 |
Median (IU/ml) | 0.210 | 0.150 | 0.160 |