TABLE 1.

Distributions of socioeconomic characteristics in the study population (%)

	Girls				Boys
	2002–2003	2012–2013	2018–2019	p*	2002–2003	2012–2013	2018–2019	p*
N	700	657	676		783	636	710
Family structure
mother and father	68.7	77.8	78.0	0.003	69.7	77.8	83.1	<0.001
other family structure	25.7	20.7	19.5		22.9	19.5	14.5
missing	5.6	1.5	2.5		7.4	2.7	2.4
Both parents only basic education
no	69.4	79.3	85.2	<0.001	68.7	87.4	84.6	<0.001
yes	20.0	9.3	5.6		18.3	7.7	4.4
missing	10.6	11.4	9.2		13.0	12.6	11.0
Parental unemployment past year
no	68.7	75.8	71.2	0.02	73.1	72.3	75.5	0.4
one parent	27.1	19.8	24.4		21.7	21.7	18.7
both parents	2.9	2.3	1.9		3.1	2.8	2.1
missing	1.3	2.1	2.5		2.2	3.1	3.7

Note. *P-values were calculated by Chi-square test