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Prolactin and Thyroid Stimulating Hormone (TSH) Levels and Sexual Dysfunction in Patients with Schizophrenia Treated with Conventional Antipsychotic Medication: A Cross-Sectional Study

Yunqiao Zhang, Zhen Tang, Ye Ruan, Chaohong Huang, Jie Wu, Zixiang Lu, Wang Li, Yan Tang, Jianping Liu, Jixiang She, Ting Ting Wang, Yu Zhu, Zhao Wei Teng, Yong Zeng

(Sixth Affiliated Hospital, Kunming Medical University, Yuxi, Yunnan, China (mainland))

Med Sci Monit 2018; 24:9136-9143

DOI: 10.12659/MSM.913759

BACKGROUND: This study aimed to investigate the relationship between serum profiles of prolactin and thyroid stimulating hormone (TSH) and sexual dysfunction in patients with schizophrenia treated with conventional antipsychotic medication.
MATERIAL AND METHODS: A hospital-based cross-sectional study included 118 patients, age range 18–57 years (55 men, 63 women), with a confirmed diagnosis of schizophrenia. All patients were stable after antipsychotic treatment. Serum levels of hormones, including prolactin, follicle-stimulating hormone (FSH), luteinizing hormone (LH), estradiol (E2), progesterone, testosterone, thyroid-stimulating hormone (TSH), triiodothyronine (T3), thyroxine (T4), free triiodothyronine (FT3) and free thyroxine (FT4), were detected in venous blood. The Positive and Negative Syndrome Scale (PANSS) score was used to measure symptom severity of patients with schizophrenia. The Mandarin Chinese version of the Arizona Sexual Experience Scale (ASEX), a 5-item scale, was used to measure sexual function.
RESULTS: There were 66 patients (55.9%) who had hyperprolactinemia, the prevalence of hyperprolactinemia was markedly higher in the sexual dysfunction group than the non-sexual dysfunction group (91.8% vs. 17.5%) (P<0.001). Mean prolactin levels were significantly increased in patients with sexual dysfunction compared with the patients without sexual dysfunction (P<0.001), with a higher incidence in female patients. Subclinical hypothyroidism and hyperprolactinemia were found to be independently associated with sexual dysfunction, and an increased PANSS negative score was an independent risk factor for the development of sexual dysfunction.
CONCLUSIONS: The incidence of sexual dysfunction was significantly increased in patients with schizophrenia. Hyperprolactinemia and subclinical hypothyroidism were associated with sexual dysfunction, especially in female patients.

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