The search yielded a total of 174 articles. After analyzing them to determine their compliance with the inclusion criteria and assessing their quality, a final set of 14 articles remained for further analysis (see
Figure 1). Thus, in the present systematic review study, 14 selected articles were analyzed, in which population samples and variables related to mental and sexual health were examined. Regarding the former, it was found that 42.9% of the studies used clinical samples as the study population [25-30], while 35.7% used representative samples of the general population [31-35]. Only three studies (21.4%) used both types of samples, clinical and general population [36-38].
Secondly, regarding variables related to mental health, it was observed that anxiety and depression were the most investigated constructs. 71.4% of the studies examined these constructs individually, in combination, or with other mental health constructs. Only four studies (28.6%) of the reviewed articles investigated other variables than anxiety or depression, such as sense of responsibility [
31], attention deficit hyperactivity disorder [
37], constructs related to objectification [
33], and other aspects of mental health [
30]. In relation to sexual health variables, 50% of the studies exclusively evaluated variables linked to sexual functioning, while two articles (14.3%) analyzed aspects other than sexual functioning but related to sexual health [
28,
33]. 5 articles (35.7%) examined variables associated with sexual functioning along with other variables related to sexual health [
26,
27,
29,
37,
38].
Concerning the measures used to assess variables related to mental and sexual health, it was found that standardized scales were used in most of the reviewed studies. To measure anxiety exclusively, the Florida Shock Anxiety Scale (FSAS) by Ford et al. [
39] and the Generalized Anxiety Disorder Scale (GAD-7) by Löwe et al. [
40] were employed. As for depression, the Beck Depression Inventory (BDI) [
41], the Beck Depression Inventory-II (BDI-II) [
42], and the Beck Depression Inventory Primary Care (BDI-PC) [
43] were used. Only three articles (21.4%) employed measures that assessed both anxiety and depression, such as the Hospital Anxiety and Depression Scale (HADS) by Zigmond and Snaith [
44], the Brief Symptom Inventory (BSI) by Derogatis [
45], and an ad hoc measure that evaluated general aspects of mental health. Considering the measures used to assess variables related to sexual health, the Female Sexual Function Index (FSFI) developed by Rosen et al. [
46] was the most used in nine studies (64.3%), being the predominant scale in this review. Of the nine studies, four studies exclusively used the FSFI, while the other five studies used the FSFI along with other scales to assess various constructs related to sexual health. It is worth mentioning that in the study by Vedovo et al. [
34], both the FSFI and the Operated Male to Female Sexual Function Index (OMtFSI) [
47] were used, with the latter being the first scale designed to assess sexual functioning in trans women. Other scales used to assess sexual functioning or related aspects included the Female Sexual Function Questionnaire-2 (FSM-2; for its acronym in Spanish) designed by Sánchez-Sánchez et al. [
48], the Global Measure of Sexual Satisfaction (GMSEX) by Lawrance et al. [
49], an ad hoc questionnaire used by Dubin et al. [
31] to assess desire and satisfaction, and a Female Orgasmometer, a single-item Likert scale derived from the Visual Analog Scale for Pain [
50], which was used in the study by Mollaioli et al. [
32]. Other scales that did not directly assess sexual functioning but rather other aspects of sexual health were used such as the Sexual Distress Scale (SDS) created by Santos-Iglesias et al. [
51], the Sexual Complaint Screener-Women (SCS-W) developed by the International Society of Sexual Medicine (ISSM) [
52], the Sexual Risk Survey (SRS) by Turchik and Garske [
53], and the Interpersonal Sexual Objectification Scale (ISOS) by Kozee et al. [
54], among others (see
Table S1).
Finally, the results of the reviewed articles were categorized according to their focus, whether contextual, medical, or psychological. Seven articles (50%) presented results that combined two of these categories. Of these, five were categorized as contextual-psychological, with risk factors influencing mental and sexual health variables. They explored factors related to the COVID-19 pandemic, social stigmas towards women, and postponed fertility treatments [
25,
28,
32,
33,
35]. The other two articles were categorized as medical-psychological, focusing on risk factors related to ADHD and hypoactive sexual desire diagnosis, respectively [
30,
37]. Additionally, other four articles (28.6%) centered only on medical outcomes, addressing factors related to cancer, menopause, and pelvic-genital pain [
26,
27,
29,
38]. Two articles (14.3%) presented exclusively psychological outcomes, with anxiety and depression as the risk factors [35, 36]. Finally, only one article (7.1%) addressed contextual outcomes, specifically the partner context, by examining couple´s problems caused by the partner’s erectile dysfunction [
31]. This section may be divided by subheadings. It should provide a concise and precise description of the experimental results, their interpretation, as well as the experimental conclusions that can be drawn.