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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.