| Oluwole (1990) (15) | Descriptive | 2000 women | Questionnaire | The findings showed a significant relationship between SSE and marital satisfaction. |
| Seal et al. (1997) (16) | Correlative | 121 women | Questionnaire | Findings explore the connection between SSE on the amount of sexual activity, which in turn, is positively related to risk taking. |
| Reissing et al. (2005) (17) | Cross-sectional | 84 women | Questionnaire | The findings suggest that SSE mediated the association between sexual adjustment and sexual self-schema. |
| Steinke et al. (2008) (18) | Correlative | 59 healthy elders and 85 patients with HF | Questionnaire | Research findings suggest there is a relationship between SSE and sexual activity. A higher sexual self-concept of greater SSE were predictors of sexual activity. |
| Rostosky et al. (2008) (19) | Cross-sectional | 388 students | Questionnaire | Males reported lower sexual esteem and lower SSE than females. Sexual self-esteem uniquely predicted higher SSE scores. |
| Vaziri et al. (2010) (20) | Correlative | 194 women | Questionnaire | Research results suggest a relationship between SSE and marital satisfaction and SSE scores is predicted of marital satisfaction. |
| Sarikhani et al. (2011) (21) | Quasi-experimental | 200 women | Pre and post-test in experimental and control group | The findings showed that women’s SSE reduces after delivery. |
| Viseskul et al. (2013) (22) | Cross-sectional | 92 HIV-positive | Questionnaire | The scores of the SSE were significantly lower in those aged 17 to 21 than in 14 to 16. |
| Zimmer-Gembeck (2013) (23) | Correlative | 199 women | Questionnaire | Research findings explore the indirect association of women’s autonomy with SSE. |
| Nooripour et al. (2013) (24) | Quasi-experimental | 40 couples | Pre and post-test in experimental and control group | Findings indicate that training significantly improved marital satisfaction and SSE. |
| Redmond and Lewis (2014) (25) | Cross-sectional | 214 women | Questionnaire | The results indicated significant differences exist between genders in perception of SSE. Having high negotiation skills were significant predictors for highly perceived SSE. |
| Nooripour et al. (2014) (26) | Case – Control | 40 couples | Pre and post-test in experimental and control group | Findings indicate that training significantly improved SSE of participants. |
| Widman et al. (2013) (27) | Cross-sectional | 476 people living with HIV | Questionnaire | The results indicated that greater SSE predicted unsafe intercourse. |
| Alirezaee et al. (2014) (28) | Historical cohort | 170 fertile and 85 infertile women | Questionnaire | The results indicated that infertility is associated with poor SSE. |
| Salehi et al. (2015) (29) | Cross-sectional | 200 participants with physical-motor disabilities | Questionnaire | Research findings indicated that sexual self-efficacy score in women with physical-motor disabilities were higher than men in all domains and there was a relationship between men’s sexual self-efficacy with their self-esteem. |
| Hsu et al. (2015) (30) | Cross-sectional | 713 Nursing students | Anonymous mailed questionnaire | Findings suggest that sexual self-concept significantly predicted SSE. SSE predicted by sexual risk cognition. |
| Norton et al. (2016) (31) | Longitudinal | 296 couples | Computer-assisted self interviews | The results showed higher artist status principals were considerably related to more SSE, higher artist toughness principals were related to less SSE, and higher artist anti-femininity principals were considerably related to less SSE. |
| Rosenthal et al. (1991) (10) | Cross-sectional | 1788 | Questionnaire | The finding indicated that Females were significantly more SSE than males |
| Zare et al. (2016) (7) | Correlative | 79 women | Questionnaire | The result shows that SSE in women has a positive effect on marital satisfaction. |
| Tung et al. (2011) (32) | Cross-sectional | 996 college students | Questionnaire | The findings showed that SSE prevents of female students to practice unsafe sex. |
| Hajinia and Khalatbari (2017) (9) | Quasi-experimental | 30 women | Pre-test and post-test in experimental and control group | The results from this study revealed that sex therapy improves SSE. |
| Addoh et al. (2017) (33) | Multivariable logistic regression models | 157 female college students | Questionnaire | Results showed that a greater degree of SSE is associated with increased of safe-sex practice. |
| Malonzo and Chavez (2012) (34) | Descriptive study | 80 women | Questionnaire | There was a significant relationship between SSE and sexual risk cognitions. |
| Golmakani et al. (2018) (35) | Experimental | 79 women | Pre and post-test in experimental and control group | The results revealed that the pelvic muscles exercise in women after delivery improve the SSE. |
| Fedding and Rossi (1999) (36) | Cross-sectional | 305 male and female college students | Questionnaire | The results suggest that SSE can help in enhancing safer sex adoption and adherence at both public and individual sexual health levels. |