Disease duration-stratified associations of thyroid hormone levels with psychopathology in hospitalized patients with schizophrenia: A cross-sectional study

Table 3 Correlational analysis of thyroid hormone levels and Positive and Negative Syndrome Scale profile scores in patients with stable schizophrenia

Variable	0-10 years group				10.1-20 years group				> 20 years group
	Total score	Positive symptoms	Negative symptoms	General psychopathology	Total score	Positive symptoms	Negative symptoms	General psychopathology	Total score	Positive symptoms	Negative symptoms	General psychopathology
TSH	-0.027	-0.109	0.084	-0.057	-0.219	-0.185	-0.096	-0.310b	-0.114	-0.014	-0.123	-0.13
FT3	-0.207	-0.041	-0.116	-0.385b	0.07	-0.055	0.121	0.091	-0.001	0.081	-0.058	-0.065
FT4	-0.044	-0.003	-0.106	-0.089	-0.248a	-0.213	-0.169	-0.165	0.001	0.02	-0.009	0.033
T3	-0.102	-0.145	0.091	-0.291a	0.006	0.089	0.139	0.06	0.081	0.053	0.077	0.015
T4	-0.224	-0.158	-0.177	-0.298a	-0.115	-0.195	0.11	-0.101	-0.014	-0.09	0.015	0.007

^aP < 0.05.

^bP < 0.001.

TSH: Thyroid stimulating hormone; T3: Triiodothyronine; FT3: Free triiodothyronine; T4: Thyroxine; FT4: Free thyroxine.