Table 1

Demographic characteristics and BMI of the study populationa
Boys Girls
n % n % Χ2 p
Ethnicity
Scandinavian ethnicity 2088 83.9 2067 83.6 0.106 0.745
Non-Scandinavian ethnicity 401 16.1 405 16.4 0.020 0.888
Parental employment status
Both parents working 1982 79.8 1934 78.0 0.588 0.443
At least one parent unemployed 501 20.2 544 22.0 1.769 0.183
Housing conditions
Living in an apartment 659 26.3 672 27.1 0.127 0.722
Living in a villa etc. 1851 73.7 1809 72.9 0.482 0.488
Exercise habits
Exercises at least once a week 1904 78.4 1872 77.4 0.271 0.603
Exercises less than once a week 524 21.6 581 23.7 2.940 0.086
BMI
BMI < 18 154 6.4 287 12.4 40.111 <0.001
BMI 18–24.99 1845 77.1 1836 79.3 0.022 0.882
BMI >25 394 16.5 191 8.3 70.443 <0.001

aSplit on boys and girls, with p-values of sex differences.

Condén et al.

Condén et al. BMC Pediatrics 2013 13:11   doi:10.1186/1471-2431-13-11

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