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Table 1 Age and gender of the respondents and non-respondents to a postal questionnaire compared to all Giardia-positive cases during an outbreak in Bergen, Norway in 2004.

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

Characteristic Respondents
N (%)
Non-respondents
N (%)
All cases
N (%)
Total 1017 (100) 245 (100) 1262 (100)
Gender    
   Female 647 (64) 117 (48) 764 (61)
   Male 370 (36) 128 (52) 498 (39)
Age(Years)    
   0-19a 62 (6) 25 (10) 87 (7)
   20-39 679 (67) 185 (76) 864 (68)
   40-59 211 (21) 32 (13) 243 (19)
   60-79 55 (5) 3 (1) 58 (5)
   80-100 10 (1) 0 (0) 10 (1)
  1. aAmong respondents, 13 cases (1%) were less than 5 years, 13 cases (1%) were 5-9 years, 12 (1%) cases were 10-14 years and 24 (2%) cases were 15-19 years old.