Table 5.

Factors* related to serum ARI and DARI concentrations in patients with schizophrenia as identified with stepwise regression analysis (n=299)

Index	In serum ARI concentration			In serum DARI concentration
Factor	Coefficient	t	P value	Factor	Coefficient	t	P value
Constant	212.31	6.44	<0.001	Constant	83.72	4.82	<0.001
Age	−0.88	−2.06	0.04	ARI dose	5.26	7.67	<0.001
ARI dose	10.32	7.79	<0.001
Comedication	−39.07	−2.99	0.003

*Serum ARI concentration: adjusted R squares of the equation is 0.091 (F=19.99, p<0.001). Serum DARI concentration: adjusted R squares of the equation is 0.075 (F=16.30, p<0.001).

ARI, aripiprazole; DARI, dehydroaripiprazole.