Volume 5, Number 5—October 1999
Dispatch
Diphtheria Antitoxin Levels in the Netherlands: a Population-Based Study
Hester E. de Melker
, G.A.M. Berbers, N.J.D. Nagelkerke, and M.A.E. Conyn-van Spaendonck
, G.A.M. Berbers, N.J.D. Nagelkerke, and M.A.E. Conyn-van Spaendonck
Table 1
Diphtheria immunity in a nationwide sample of persons ≤79 years of age, the Netherlands
| <0.01 IU/ml | 0.01-0.1 IU/ml | ≥0.1 IU/ml | Geometric mean titer | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Sample | No. | (95% CIa) | (95% CI) | (95% CI) | (95% CI) | ||||
| Overall | 7,715 | 11.9 | (10.7-13.1) | 30.0 | (28.3-31.7) | 58.1 | (56.2-59.9) | 0.12 | (0.11-0.13) |
| Men | 3,644 | 9.3 | (8.0-10.6) | 28.1 | (25.9-30.2) | 62.6 | (60.1-65.2) | 0.14 | (0.13-0.16) |
| Women | 4,071 | 14.4 | (12.6-16.2) | 31.6 | (29.7-33.6) | 54.0 | (51.9-56.0) | 0.10 | (0.09-0.11) |
aCI, confidence interval.
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