Table 1

Distribution of categorical explanatory variables
n %
Age of the boy’s mother
Old 2225 93.6
Young 151 6.4
Age of the boy’s father
Old 2269 93.8
Young 149 6.2
Educational level of the boy’s mother
High 760 29.8
Low 1789 70.2
Educational level of the boy’s father
High 509 21.7
Low 1833 78.3
Family structure
Intact 2182 83.3
Non-intact 436 16.7
School performance
Average or above 2241 84.1
Below average 425 15.9
Police register information*
No criminal offenses 2101 77.2
1-2 offenses 401 14.7
3-5 offenses 108 4.0
>5 offenses 111 4.1

Lehti et al.

Lehti et al. BMC Public Health 2012 12:560   doi:10.1186/1471-2458-12-560

Open Data