Objectives:
An attempt to assess the impact of dual diagnosis – mental illness and addiction on the occurrence of sexual dysfunctions, and evaluation of problems with sexual functioning in men treated in a psychiatric ward.

Methods:
140 psychiatrically hospitalized men (mean age 40.4 ± 12.7 years) with the diagnosis of schizophrenia, affective disorders, anxiety disorders, addiction and double diagnosis (schizophrenia and addiction) took part in the study. The Sexological Questionnaire, developed by Professor Andrzej Kokoszka, and the International Index of Erectile Function IIEF-5 were used in the study.

Results:
The occurrence of sexual dysfunctions in the study group was reported in 83.6% of patients. The most common was reduction in sexual needs (53.6%) and orgasm delay (40%). Depending on the research tool used, erectile dysfunction appeared in 38.6% of respondents (according to Kokoszka’s Questionnaire) and 61.4% of patients (IIEF-5). Severe erectile dysfunction was more common in the group of patients without a partner (12.4% vs. 0; p = 0.000) compared to people in relationships and in the group with anxiety disorders (p = 0.028) compared to groups with other mental disorders. In the group of people with dual diagnosis (DD), sexual dysfunctions were observed more frequently in comparison to patients with schizophrenia (p = 0.034). Treatment lasting over 5 years was more often associated with sexual dysfunctions (p = 0.007). In the DD group, lack of orgasm and excessive sexual needs were more frequent in comparison to people with one diagnosis (p = 0.0145; p = 0.035).

Conclusions:
Sexual dysfunctions are more common in patients with DD in comparison to patients diagnosed with schizophrenia. Lack of a partner and the duration of psychiatric treatment over 5 years is associated with more frequent occurrence of sexual dysfunctions