Table 2. Associations between child characteristics and lower secondary school level than indicated by Cito-test.

Characteristics		School level < Cito-test score (ref. school level = Cito-test score)
		Crude OR (95% CI)		Adjusted OR* (95% CI)
Teacher’s assessment (ref. teacher’s assessment = Cito-test score)
	< Cito-test score	8.6	(5.2 to 14.1)	7.6	(4.5 to 12.7)
Male sex		1.8	(1.3 to 2.4)	1.9	(1.4 to 2.6)
Education mother (ref. high)
	Low	2.4	(1.6 to 3.6)	1.4	(0.8 to 2.3)
	Medium	1.8	(1.3 to 2.6)	1.4	(1.0 to 2.1)
Education father (ref. high)
	Low	2.8	(2.0 to 4.1)	2.1	(1.3 to 3.4)
	Medium	1.6	(1.1 to 2.3)	1.3	(0.9 to 2.0)
Diagnosed attention disorder		3.2	(1.9 to 5.4)	2.5	(1.4 to 4.5)
Asthma		0.5	(0.2 to 1.0)	0.5	(0.2 to 1.1)
Smoking (ref. never smoked)
	Now and then or daily	2.7	(2.0 to 3.7)	3.1	(2.2 to 4.3)
Using drugs (ref. never used drugs)
	Have used or using drugs	4.1	(2.4 to 6.9)	5.0	(2.8 to 8.7)
Glasses of alcohol in the past four weeks (ref. no alcohol used)
	≥ 1 glasses	1.9	(1.4 to 2.8)	2.2	(1.5 to 3.3)
Lessons skipped during past four weeks (ref. 0)
	≥ 1 Lessons	1.7	(1.1 to 2.7)	1.7	(1.1 to 2.8)
Parents divorced		1.5	(1.0 to 2.2)	1.6	(1.0 to 2.4)
Nasty experiences (ref. few)
	Many nasty experiences	1.7	(1.2 to 2.6)	2.0	(1.3 to 3.1)
Being bullied during the last 12 months (ref. not bullied)
	Being bullied ≥ 1 time	1.6	(1.1 to 2.3)	1.4	(0.9 to 2.1)

Statistically significant associations are printed in bold.

* Adjusted for teacher’s assessment < Cito-test score, sex, level of education mother and level of education father.