Table 2.

Regression analyses showing association between microminerals and SPM score in adolescents.

		Whole blood microminerals
Models	Regression parameters	Cu	Mn	Se	Zn
Model 1	Coefficient (β)	0.15	0.16	0.07	0.03
	95% CI	0.06–0.25	0.07–0.26	0.02–0.13	0.02–0.05
	p-value	0.002	0.001	0.008	<0.001
Model 2	Coefficient (β)	2.18	2.69	1.89	2.61
	95% CI	1.07–3.29	1.58–3.80	0.78–3.00	1.50–3.72
	p-value	<0.001	<0.001	0.001	<0.001
Model 3	Coefficient (β)	0.13	0.12	0.05	0.03
	95% CI	0.04–0.22	0.02–0.21	−0.01-0.10	0.01–0.04
	p-value	0.007	0.019	0.083	0.001
Model 4	Coefficient (β)	2.03	2.47	1.64	1.88
	95% CI	0.92–3.13	1.36–3.57	0.54–2.74	0.79–2.97
	p-value	<0.001	<0.001	0.003	0.001

CI, confidence interval.

Model 1: unadjusted; independent variable used as continuous variable.

Model 2: unadjusted; independent variable used as quartiles.

Model 3: independent variable used as continuous variable and model adjusted for sex, smoking in the household, school grade, father education, mother education, season of birth, soft drinks.

Model 4: independent variable used as quartiles and model adjusted for as in model 3.