1. Introduction
Personality disorders (PDs) are defined as pervasive and non-normative patterns of thoughts and behaviors that are long-lasting and lead to serious damage to relationships and overall functioning [1]. In the latest version of the Diagnostic and Statistical Manual of Mental Disorders-5th edition (DSM-5), and the International Classification of Diseases- 10th Revision (ICD-10), PDs are described as patterns of inner behavior and experiences that deviate from cultural norms and cause harms in some areas, such as emotional and interpersonal domains [2]. In epidemiological studies, the prevalence of PDs has reported 4.4-13.4%, considering “personality disorder not otherwise specified” [3]. One of the appropriate diagnostic tools in recent years is the Structured Clinical Interview for DSM-5 (SCID-5). The unique feature of SCID-5-PD is the existence of a self-report personality questionnaire (SCID-5-SPQ) for screening and evaluation of personality disorders. It takes approximately 20 minutes to complete.
Improving the evaluation of PDs and other comorbid clinical disorders is clinically important, and the methods that require less time for patients and therapists to complete are necessary in screening and assessing the treatment process. Despite the importance and usefulness of the interview, it is somehow difficult for the therapist and the patient due to its time-consuming nature. Therefore, it is necessary to use a valid questionnaire to evaluate PDs and evaluate its standardization in the target community. In this regard and considering that the SCID-5-SPQ has not yet been standardized for Iranian population, this study aims to assess the psychometric characteristics of the Persian version of the SCID-5-SPQ.
2. Materials and Methods
The study population included all outpatients and inpatients referred to Iran Psychiatric Hospital, Hazrat-e Rasool General Hospital and the clinic of the Faculty of Behavioral Sciences and Mental Health (Tehran Institute of Psychiatry). Entry criteria were age 18-65 years, declaring consent to enter the study, and the ability to speak in Persian. Exit criteria were mental retardation or severe dementia, and severe symptoms of acute psychosis that can disrupt the interview process. Sampling in this study was performed using a convenience sampling method (n=289). After conducting interviews and recording demographic information in the relevant form, participants were asked to answer the SCID-5-SPQ as well as the Persian version of SCID-5 Personality Disorder (SCID-5-PD).
In order to describe and analyze the collected data, descriptive and inferential statistics were used to investigate face validity, internal consistency (by Cronbach’s alpha), convergent validity (by Spearman correlation test) and the differences between self-reports of women and men (by Mann-Whitney U test).
3. Results
Based on the results, the Persian SCID-5-SPQ had a good face validity. Regarding the convergent validity, all subscales of this questionnaire had a significant positive correlation with SCID-5-PD (P<0.001) (Table 1).


Moreover, Cronbach’s alpha was reported α=0.93; therefore, the Persian SCID-5-SPQ had high internal consistency.
4. Discussion 
The Persian version of the SCID-5-SPQ has good validity and reliability and can be used in research and treatment, and for screening patients with personality disorders in Iran.

Ethical Considerations
Compliance with ethical guidelines
This study obtained its ethical approval from the Research Ethics Committee of Iran University of Medical Sciences (Code: IR.IUMS.REC.1396.31156). All procedures were in accordance with the Declaration of Helsinki.

Funding
This study was financially supported by the Faculty of Behavioral Sciences and Mental Health of Iran University of Medical Sciences.

Authors contributions
Conceptualization: Banafsheh Gharraee, Samira Masoumian; Research: Samira Masoumian, Somayeh Zamirinejad; Data analysis: Hooman Yaghmaeizadeh; Editing and finalizing: Samira Masoumian.

Conflicts of interest
The authors declared no conflict of interest.

Acknowledgements
The implementation of the present study has been completed with the cooperation and support of many people From all heads and officials and staff of Iran Educational, Psychiatric, Educational Center, Hazrat Rasool Akram Educational Complex and Clinic of the Faculty of Behavioral Sciences and Mental Health (Tehran Institute of Psychiatry) for their assistance in this matter and from all patients for their cooperation in conducting this research. 



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