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Table 1 Characteristics of 242 female child day care workers in Amsterdam, The Netherlands, compared with 298 women of the Amsterdam population (2004)

From: Increased seroprevalence of IgG-class antibodies against cytomegalovirus, parvovirus B19, and varicella-zoster virus in women working in child day care

Characteristics N % Child Day Care Workers Population sample
n % n % p value
Total 540   242 44.8% 298 55.2%  
Age        
Median age in years 32 (IQR 25–39) 29 (IQR 24–35) 35 (IQR 28–40) < 0.001    
Age (in years)        < 0.001
<20 23 4.3 % 11 4.6 % 12 4.0 %  
20–24 92 17.0 % 51 21.1 % 39 13.1 %  
25–29 107 19.8 % 69 28.5 % 40 13.4 %  
30–34 90 16.7 % 48 19.8 % 42 14.1 %  
35–39 108 20.0 % 30 12.4 % 78 26.2 %  
40–44 120 22.2 % 33 13.6 % 87 29.2 %  
Country of birth        < 0.001
The Netherlands 294 54.4 % 176 72.7 % 118 39.6 %  
Other European countries 25 4.6 % 11 4.6 % 14 4.7 %  
Suriname and Dutch Antilles 37 6.9 % 26 10.7 % 11 3.7 %  
Turkey 90 16.7 % 5 2.1 % 85 28.5 %  
Morocco 66 12.2 % 15 6.2 % 51 17.1 %  
Other countries 28 5.2 % 9 3.7 % 19 6.4 %  
Country of birth by continent        < 0.001
The Netherlands & Other European countries 319 59.1 % 187 77.3 % 132 44.3 %  
Non-European countries* 221 40.9 % 55 22.7 % 166 55.7 %  
Age at immigration        < 0.001
0–17 years 97 40.9 % 27 44.3 % 70 39.6 %  
18 and older 140 59.1 % 34 55.7 % 107 60.5 %  
Data missing 9 5 4  
Not applicable (born in the Netherlands) 294 176 118  
Having children        < 0.001
Yes 293 62.2 % 101 41.7 % 192 84.2 %  
No 177 37.8 % 141 58.3 % 36 15.8 %  
Data missing 70 0 70  
Number of children        < 0.001
0 177 32.8 % 141 58.3 % 36 12.1 %  
1 104 19.3 % 46 19.0 % 58 19.5 %  
2 113 20.9 % 35 14.5 % 78 26.2 %  
3 76 14.1 % 20 8.3 % 56 18.8 %  
Data missing 70 13.0 % 0 0 % 70 23.5 %  
  1. * Africa, Asia and Central and South America.
  2. IQR; Interquartile range.