Table 2

Demographic data for exposed and unexposed groups, Bergen, Norway 2005.

n

Exposed

n

Unexposed

P-value


Sex, n

378

135

0.55F

Girls n (%)

181 (47.8)

69 (51.1)

Boys n (%)

197 (52.2)

66 (48.9)

Ethnical background, n

331

120

0.21P

European n (%)

301 (90.1)

110 (91.7)

African n (%)

2 (0.6)

3 (2.5)

Asian n (%)

14 (4.2)

2 (1.7)

Other n (%)

14 (4.2)

5 (4.2)

Travelled outside of Northern Europe last year, n (%)

374

144 (38.5)

132

48 (36.4)

0.68 F

Number of members in the household (mean ± SE)

376

3.9 ± 0.1

135

4.1 ± 0.1

0.02 W

Age in months (mean ± SE)

356

36.9 ± 0.9

133

34.9 ± 1.3

0.32 W


F = Fishers exact test (2-sided)

P = Pearson chi-square test (2-sided)

W = Wilcoxon- Mann-Whitney test

SE = Standard error

Demographic data for 513 children aged 0-5 years classified as exposed and unexposed to Giardia-contaminated drinking water according to self-report on a mailed questionnaire in the city of Bergen, Norway 2005.

Mellingen et al. BMC Public Health 2010 10:163   doi:10.1186/1471-2458-10-163

Open Data