Mental health problems in the 10thgrade and non-completion of upper secondary school: the mediating role of grades in a population-based longitudinal study

Table 4 Mental health problems and health behaviour in the 10 ^th grade as predictors of non-completion of upper secondary school in boys (n = 4760)

	Crude			Model 1^a			Model 2^b			Model 3^c
	OR	95% CI		OR	95% CI		OR	95% CI		OR	95% CI
SDQ externalising (per 2 points)	1.43	1.38	1.49*	1.38	1.32	1.44*	1.38	1.32	1.45*	1.27	1.21	1.33*
SDQ internalising (per 2 points)	1.17	1.12	1.22*	1.11	1.06	1.16*	1.00	0.95	1.05	1.01	0.96	1.06
Health behaviour
Smoking
No	ref.		*							ref.		*
Sometimes	1.82	1.53	2.17							1.56	1.27	1.91
Yes, every day	4.83	4.02	5.80							2.80	2.25	3.48
Alcohol last year
Never	ref.		*							ref.		^d
A few times last year	0.91	0.77	1.08							0.88	0.72	1.06
1–3 times a month	1.41	1.21	1.66							1.02	0.84	1.24
Once a week or more	2.21	1.82	2.68							1.36	1.06	1.73
Physical activity
0 hours per week	ref.		*							ref.		*
1–2 hours per week	0.82	0.66	1.03							0.92	0.71	1.18
3–4 hours per week	0.61	0.49	0.76							0.71	0.55	0.91
5–7 hours per week	0.53	0.43	0.66							0.72	0.56	0.92
8 hours or more per week	0.47	0.38	0.58							0.62	0.49	0.80

^aModel 1: SDQ externalising and SDQ internalising separately, adjusted for ethnic background, county of residence, parents’ education, income and merital status.
^bModel 2: SDQ externalising and SDQ internalising adjusted for each other, and for ethnic background, county of residence, parents’ education, income and merital status.
^cModel 3: Like model 2, in addition adjusted for health behaviours.
*p ≤ 0.001.
^d p = 0.003.

ISSN: 1471-2458