Table 2 Prevalence of VZV IgG antibodies by demographic characteristics among 1,341 Amsterdam residents aged 18 years and older, 2004
| Â | Â | Study sample | The overall Amsterdam population | |||
|---|---|---|---|---|---|---|
| Â | n | % negative | % equivocal | % positive | % anti-VZV seropositive (95% CI) | P-value |
Total | 1,341 | 4.1 | 2.8 | 93.1 | 93.8 (91.6–95.5) |  |
Sex | Â | Â | Â | Â | Â | 0.29 |
 Male | 619 | 4.2 | 2.9 | 92.9 | 92.8 (89.0–95.4) |  |
 Female | 717 | 4.0 | 2.8 | 93.2 | 94.8 (92.2–96.6) |  |
Age category | Â | Â | Â | Â | Â | 0.42 |
 18–34 years | 212 | 4.7 | 2.4 | 92.9 | 92.0 (86.3–95.5) |  |
 35–44 years | 291 | 4.1 | 3.4 | 92.4 | 95.0 (90.8–97.3) |  |
 45–54 years | 325 | 4.9 | 3.1 | 92.0 | 93.5 (89.3–96.1) |  |
 55–64 years | 279 | 2.2 | 2.5 | 95.3 | 96.4 (92.4–98.4) |  |
 65 years and older | 224 | 4.5 | 2.7 | 92.9 | 94.8 (89.9–97.4) |  |
 Age missing | 10 | 10.0 | 0 | 90.0 | - |  |
Ethnic origin | Â | Â | Â | Â | Â | 0.03 |
 Dutch | 437 | 2.1 | 1.8 | 96.1 | 96.6 (94.3–98.0) |  |
 Surinamese and Antillean | 89 | 5.6 | 1.1 | 93.3 | 93.0 (80.2–97.8) |  |
 Turkish | 319 | 4.7 | 4.7 | 90.6 | 91.8 (87.1–94.8) |  |
 Moroccan | 275 | 5.8 | 3.6 | 90.6 | 89.7 (82.9–94.0) |  |
 Other | 211 | 4.7 | 1.9 | 93.6 | 90.0 (82.8–94.3) |  |
 Ethnic origin missing | 10 | 0 | 0 | 100 | - |  |
Generation | ||||||
 Dutch | 437 | 2.1 | 1.8 | 96.1 | 96.6 (94.3–98.0) | 0.002 |
 1st generation. Surinamese or Antillean | 78 | 6.4 | 1.3 | 92.3 | 90.6 (74.7–96.9) |  |
 1st generation. Turkish | 306 | 4.6 | 4.9 | 90.5 | 91.5 (86.5–94.7) |  |
 1st generation. Moroccan | 262 | 5.7 | 3.8 | 90.5 | 90.1 (83.5–94.2) |  |
 Other 1st generation | 189 | 5.3 | 2.1 | 92.6 | 87.9 (79.7–93.0) |  |
 2nd generation immigrants | 59 | 3.4 | 0 | 96.6 | 98.3 (91.3–99.7) |  |
 Ethnic origin missing | 10 | 0 | 0 | 100 | - |  |
Immigration status | Â | Â | Â | Â | Â | 0.02 |
 Autochthonous (born in the Netherlands) | 516 | 2.1 | 1.6 | 96.3 | - |  |
 Immigrated at age > 10 years | 721 | 5.7 | 4.0 | 90.3 | 86.3 (80.4–90.7) |  |
 Immigrated at age ≤ 10 years | 64 | 1.6 | 1.6 | 96.9 | 97.5 (87.8–99.5) |  |
 Immigrated at unknown age | 32 | 6.3 | 0 | 93.8 | - |  |
 Country of birth missing | 8 | 0 | 0 | 100 | - |  |
Children | Â | Â | Â | Â | Â | 0.80 |
 No | 394 | 4.1 | 2.8 | 93.2 | 93.3 (88.7–96.1) |  |
 Yes | 634 | 4.3 | 3.3 | 92.4 | 94.7 (91.1–96.9) |  |
 Data on having children missing | 313 | 3.8 | 1.9 | 94.3 | - |  |
Number of children (n =1,028) | Â | Â | Â | Â | Â | 0.94 |
 0 | 394 | 4.1 | 2.8 | 93.2 | 93.3 (88.7–96.1) |  |
 1 | 203 | 4.4 | 2.0 | 93.6 | 94.9 (88.2–97.9) |  |
 2 | 239 | 5.0 | 3.8 | 91.2 | 94.7 (87.5–97.8) |  |
 3 or more | 176 | 3.4 | 4.5 | 92.1 | 93.6 (84.2–97.5) |  |
 Number of children missing | 16 | 0 | 0 | 100 | - |  |