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Highlights Depression, anxiety, and stress mediates the association between internet gaming disorder and insomnia. Depression, anxiety, and stress mediates the association between internet gaming disorder and quality of life. Internet gaming disorder may have multiple pathways in affecting adolescents’ sleep and quality of life.

Introduction Female sexual dysfunction (FSD) is a prevalent problem in the female population in Iran. A subjective assessment instrument that allows cross-cultural comparison of FSD is urgently needed. Aim The aims of the study were to translate, validate, and enhance cross-cultural comparability of an Iranian version (IV) of the Female Sexual Function Index (FSFI)—the IV-FSFI. Methods A total of 448 women (19–54 years, mean 29.7, standard deviation 7.3) from five different Iranian outpatient obstetrics and gynecology clinics were eligible for this study. The IV-FSFI was developed through forward and backward translation, revision by a research team, and a subsequent pilot study. After an interview for clinical diagnosis of FSD based on the Diagnostic and Statistical Manual of Mental Disorders, all participants completed the IV-FSFI for the validation study. Three hundred sixty-two women completed the IV-FSFI again, 4 weeks after the first visit. Main Outcome Measures Test–retest reliability was determined by Pearson’s product-moment correlations. Reliability was tested using Cronbach’s alpha coefficient. Construct validity was evaluated by principal component analysis using varimax rotation and by subsequent confirmatory factor analysis (CFA). Discriminant validity was assessed with between-groups analysis of variance. Results The overall test–retest reliability coefficients were high for each domain of the IV-FSFI (r ranging from 0.73 to 0.86) and the internal consistencies within the acceptable range (α from 0.72 to 0.90). Principal component analysis with varimax rotation revealed a best fitting five-factor structure similar to the original FSFI (χ2 = 2.1, degree of freedom = 17, P < 0.001). CFA confirmed the underlying domain structure, supporting the factorial validity of the IV-FSFI. Conclusions In conclusion, the newly developed IV-FSFI has demonstrated to be a reliable and valid instrument with good psychometric properties that allows a quick and accurate preliminary screening of women with unknown sexual health status in clinics and other medical settings.

Background Infertility has a major impact on women's quality of life and emotional well-being. The resulting interpersonal problems extend to women's sexual relationships, with a high proportion of infertile women reporting sexual problems. Aim To determine the prevalence and identify the potential risk factors of female sexual dysfunction (FSD) among infertile Iranian women. Methods Using a crosssectional study design including 12 infertility clinics in five Iranian cities, FSD was assessed in 604 infertile women using the culturally adapted, multidimensional Female Sexual Function Index (IV-FSFI). Depression, anxiety and health-related quality of life (HRQL) were also assessed for all infertile patients. Depression and anxiety were assessed with the Hospital Anxiety and Depression Scale (HADS) while HRQL was measured using the Short Form 36 (SF-36).Main outcome measure Prevalence of FSD in infertile women and associated factors. Results Infertile women reported significantly lower scores on the FSFI domains in comparison with healthy women. Risk factors for FSD as determined by multilevel analyses were older age and self-reported depression. Furthermore, secondary infertility, lower educational level and higher partner education put women at increased risk for FSD. Conclusions Among infertile women, sexual dysfunctions seem to be prevalent higher than previously published in Iran. This finding may have implications on the clinical assessment of sexual function and the role of demographic and psychological factors in infertile women.

This study aimed to examine the psychometric values of a Farsi-translated version of the International Index of Erectile Function among a population sample of Iranian men. A community sample of 2,345 healthy men and a clinical sample of 421 men with diagnosed erectile function from 2 cities of Iran participated in the study. Participants were asked to complete the International Index of Erectile Function, the Life Satisfaction questionnaire, and a demographic questionnaire at baseline. Four weeks later, both samples were asked to recomplete the International Index of Erectile Function. The response rates were 84% (n = 1,969) and 98% (n = 412) for healthy men and men with erectile function, respectively. The retest reliability of the International Index of Erectile Function showed excellent intraclass correlation coefficients for both the healthy and patient samples. The International Index of Erectile Function subscales correlated significantly with the scores resulting from the clinical rating of erectile function conducted by urologists. Men with erectile function, as diagnosed by urologists, had significant lower scores in all subscales. The results of the exploratory factor analysis indicated that the International Index of Erectile Function could be summarized into a 5-component solution.The Iranian version of the International Index of Erectile Function was found to be a highly valid and reliable instrument to be used for the assessment of erectile function in clinical and population samples.