The present analytical study aimed to compare sexual function of females of reproductive age referred to rural and urban healthcare centers in Ahvaz, Iran, in 2015. Sample size was estimated based on sample with 40 members from urban and rural areas as pilot with 95% confidence interval. Stratified clustering method was employed. For this purpose, healthcare and medical centers of Ahvaz were divided into two parts of East and West. Then, each center was considered as a cluster. In step 1, out of 23 urban healthcare centers of Ahvaz East region, urban healthcare centers 1, 6, 9 and of rural centers, Ghyzanyh, Nazheh and Koreit were randomly selected. Also, Out of 11 urban centers of Ahvaz West region, centers 1, 2, 5 and of the rural centers Albaji, Om-Tamir and Tasveyeh-shekar were randomly selected. Then, samples were randomly selected from each center and based on case number. Then 12 participants were assigned to each group. Qualified people were called and asked to participate. The inclusion criteria were: females of reproductive age (range 15 - 45 years), having intercourse with husband, being single-spouse and willing to participate in the study. The exclusion criteria were: menopause, infertility, pregnancy, history of mental health disorders, history of chronic diseases, surgical procedures such as hysterectomy and vaginal repair, polygamy and the puerperium (six weeks after childbirth) and drug addiction. Applied instrument was demographic questionnaire with two sections including personal information such as age, husband`s age, job, husband's job, literacy, husband's literacy, number of pregnancies, number of childbirth, number of children, type of delivery, average marriage duration and body mass index (BMI). Second section was related to sexual function including six fields of sexual desire (questions 1 - 2); sexual motivation (3 - 6); vaginal lubrication (7 - 10); orgasm (11 - 13), sexual satisfaction (14 - 16) and intercourse pain (questions 17 - 19). Points in each section were calculated through adding points of questions related to the section and multiplying the result by coefficient of each section. Gaining more points indicated better sexual function. Accordingly, to create the same weight for scopes, maximum point for each scope was six and a total point of 36. Point 0 indicates that individuals had no sexual activity over the past week. The cut-off point for the total scale and subscales respectively included total scale of 26.5, sexual desire to 3.3, excitement to 3.4, vaginal lubrication to 3.4, orgasm to 3.4, sexual satisfaction to 3.8 and intercourse pain of 3.8. In other words, values over the cutoff point indicated good function. Validity of female sexual function index questionnaire was confirmed by Rosen et al. (
16). In Iran, validity and reliability of its Farsi version was confirmed by Mohammadi et al. Total reliability of the test was reported to (75% and 78%) using half-split and retest method and for subtests, it has been obtained (63% - 75%) via half-split and (70% - 81%) retest methods. After obtaining permission from research deputy of university, the author referred to the centers for sampling and after receiving written consent and explaining the process to the participants, research goals and ensuring confidentiality of data, they participated in the study. Afterwards, they completed the questionnaires. All statistical analyses were conducted by SPSS ver. 22. Data analysis was conducted using descriptive statistics (frequency, standard deviation) and inferential statistics (T-test, ANOVA, Chi-square and logistic regression). Chi-square test was used to compare categorical variables in the two groups. One-way ANOVA and independent T-test were used to compare parametric sexual function and satisfaction scores. In case of significance, the odd ratios for the total population were calculated. All 2-sided hypotheses, with a P value of < 0.05, were considered significant. Values were presented as mean ± SD.