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Table 2 Symptoms two years after Giardia infection in Bergen, Norway in 2004, among 1017 respondents to a questionnaire.

From: Severity of Giardiainfection associated with post-infectious fatigue and abdominal symptoms two years after

Symptoms Casesa (%) Symptom scoreb
   Mean ± SEMc Median
Fatigue    
   Less or same as usual 511 (50)   
   More than usual 306 (30)   
   Much more than usual 113 (11)   
Abdominal symptoms    
   No 360 (35)   
   Unsure 228 (22)   
   Yes 389 (38)   
Bloating 475 (47) 4.57 ± 0.13 5.00
Diarrhoea 467 (46) 3.80 ± 0.12 3.74
Abdominal pain 442 (43) 3.64 ± 0.13 3.00
Nausea 416 (41) 2.23 ± 0.12 2.00
Reduced appetite 398 (39) 1.60 ± 0.12 0.67
Constipation 398 (39) 1.57 ± 0.12 0.66
  1. a Number of persons reporting the symptoms. Percent of respondents (n = 1017).
  2. b Symptoms scored from 0 (no symptoms) to 10 (severe symptoms).
  3. c Standard error of the mean.