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Table 1 Population characteristics and demographics of 724 Giardia exposed and 847 controls six years after an outbreak of Giardia in Bergen, Norway 2004

From: The relationship between irritable bowel syndrome, functional dyspepsia, chronic fatigue and overactive bladder syndrome: a controlled study 6 years after acute gastrointestinal infection

  All Giardia exposed Controls  
  N n % n % p-valuea)
Gender       0.666
  Female 1058 492 68.0 566 66.8  
  Male 513 232 32.0 281 33.2
Age       0.461
  18-40 1015 473 65.3 542 64.0  
  41-60 424 197 27.2 227 26.8
   > 60 132 54 7.5 78 9.2
Marital status       0.003
  Single 340 185 25.6 155 18.4  
  Married 1130 499 69.1 631 74.8
  Divorced 75 28 3.9 47 5.6
  Widowed 21 10 1.4 11 1.3
Level of education       <0.001
  Primary school 64 17 2.4 47 5.6  
  Secondary school 356 134 18.7 222 26.6
  University/college 1134 567 79.0 567 67.8
Main occupation       0.097
  Working 1249 561 78.0 688 81.5  
  Unemployed/retired 182 88 12.2 94 11.1
  Student 100 49 6.8 51 6.0
  Other 32 21 2.9 11 1.3
  1. Groups were matched by gender and age
  2. a) p-value for the difference between the Giardia exposed and the control group was calculated with Pearson’s exact χ2 test