Table 2.

Serum concentrations of THMs in schizophrenic patients (cases) and healthy subjects (controls).

Metals (ng/mL)	Cases	Controls	p a	Ratio (Cases/Controls)
Cr	0.850 (0.743–0.996)	0.852 (0.763–0.932)	0.770	0.998
Cd	0.756 (0.619–0.886)	0.768 (0.655–0.898)	0.405	0.984
Pb	0.626 (0.488–0.855)	0.546 (0.381–0.727)	0.011	1.15
As	0.593 (0.253–0.984)	0.767 (0.325–1.800)	0.025	0.773

^a In comparison with the median of controls by Mann-Whitney U test. THMs: toxic heavy metals.