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Table 2 Prevalence of VZV IgG antibodies by demographic characteristics among 1,341 Amsterdam residents aged 18 years and older, 2004

From: Seroprevalence of varicella-zoster virus and predictors for seronegativity in the Amsterdam adult population

   Study sample The overall Amsterdam population
  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       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       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       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       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       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)       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 -