Table 7.

Linear regression analysis for smoking, antipsychotic drugs used, and PANSS total scores (Dependent Variable: Metallothionein-1) (Model 2).

	Unstandardized Coefficients		Standardized Coefficients	t	p
	B	Std. Error	β
(Constant)	25.709	17.002	-	1.512	0.138
Smoking	8.375	4.814	0.166	1.740	0.090
Olanzapine + Risperidone	−1.055	4.932	−0.025	−0.214	0.832
Olanzapine + Haloperidol	−2.014	5.070	−0.046	−0.397	0.693
Risperidone	0.556	5.052	0.013	0.110	0.913
Olanzapin + Quetiapine	−1.190	5.001	−0.027	−0.238	0.813
PANSS total	−0.574	0.168	−0.369	−3.407	0.002

Model p < 0,001; R² = 0.745. Among the antipsychotic drugs used, those using olanzapine were taken as reference. PANSS: Positive and Negative Syndrome Scale.