Skip to main content

Table 1 Characteristics of 817 Giardia exposed and 1128 controls in Bergen, Norway 3 years after outbreak of Giardia-epidemic in 2004

From: Perceived food intolerance and irritable bowel syndrome in a population 3 years after a giardiasis-outbreak: a historical cohort study

Characteristic Exposed N = 817 Controls N = 1128 P
  N % N %  
Age groups, years      0.107
 0–19 39 4.8 36 3.2  
 20–39 526 64.4 736 65.2  
 40–59 187 22.9 276 24.5  
 60–79 56 6.9 76 6.7  
 80–99 9 1.1 4 0.4  
Females 540 66.1 738 65.4 0.772
Marital Status      0.003
 Single 271 33.5 293 26.1  
 Married 497 61.4 778 69.3  
 Divorced/separated 33 4.1 41 3.7  
 Widow/widower 9 1.1 11 1.0  
Education      0.004
 Primary school 37 4.7 59 5.3  
 Secondary school 169 21.3 308 27.7  
 University 587 74.0 746 67.0  
Source of income      <0.001
 Working 576 71.1 881 78.7  
 Out of Work 70 8.6 96 8.6  
 Student 137 16.9 121 10.8  
 Other 27 3.3 22 2.0  
Student autumn 2004      <0.001
 No 503 62.7 842 75.8  
 Yes, full time 261 32.5 229 20.6  
 Yes, part time 38 4.7 40 3.6  
IBS 355 46.1 155 14.0 <0.001
  1. Abbreviations: IBS Irritable Bowel Syndrome, P P-value from Pearson’s chi square (exact)