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Table 1 Baseline characteristics of primary Shigella cases (n=102) and related contacts (n=337) in high risk households, Amsterdam, The Netherlands 2002–2009

From: Risk factors for secondary transmission of Shigellainfection within households: implications for current prevention policy

Characteristics Primary cases (n=102) Household contacts (n=337) p value
   n % n %  
Age group       
  0–3 20 20 48 14  
  4–5 15 15 19 9  
  >6 67 66 260 77 0.030
Gender       
  female 53 52 171 51  
  Male 49 18 166 49 0.802
Country of birth       
  Netherlands 30 29 91 27  
  Western, other 3 3 6 2  
  Non-western 70 68 236 71  
Diarrhoea       
  Yes 102 100 87 26  
  No 0 0 228 68  
  Unknown 0 0 22 7  
Shigella isolated       
  Yes 102 100 25 7  
  No 0 0 312 86  
Shigella serotype       
  S. sonnei 57 56 15 4  
  S. flexneri 36 35 8 2  
  S. boydii 6 6 2 1  
  S. dysenteriae 3 3 0 0  
  Negative 0 0 312 93  
Months reported       
  Dec-Jan 9 9 46 14  
  Feb-Mar 6 6 15 4  
  Apr-May 9 9 25 7  
  Jun-Jul 8 8 20 6  
  Aug-Sep 51 50 168 50  
  Oct-Nov 19 19 63 19  
Hospitalised       
  No 22 22 1 0  
  Yes 80 78 336 100