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 4
Diphtheria immunity in a nationwide sample and in orthodox reformed persons in municipalities with low vaccine coverage, the Netherlands.
| Samplea | <0.01 IU/ml | 0.01-0.1 IU/ml | ≥0.1 IU/ml | Geometric mean titer | |||||
|---|---|---|---|---|---|---|---|---|---|
| (yrs) | No. | (95% CIb) | (95% CI) | (95% CI) | (95% CI) | ||||
| NW | |||||||||
| 0-49 | 5,064 | 5.3 | (4.4-6.2) | 27.3 | (25.3-29.4) | 67.4 | (65.2-69.5) | 0.17 | (0.16-0.19) |
| 50 -79 | 2,651 | 29.2 | (26.4-31.9) | 37.4 | (35.3-39.5) | 33.4 | (31.3-35.6) | 0.04 | (0.04-0.05) |
| ORLVC | |||||||||
| 0-49 | 170 | 60.8 | (40.2-81.4) | 7.4 | (2.3-12.6) | 31.8 | (13.8-49.7) | 0.02 | (0.01-0.05) |
| 50 -79 | 63 | 59.3 | (30.1-88.6) | 34.6 | (9.5-59.6) | 6.1 | (0.0-18.2) | 0.01 | (0.005-0.025) |
aNW, nationwide; ORLVC, Orthodox reformed from low vaccine coverage sample.
bCI, confidence interval.
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