1. Introduction
University students are at a critical stage of life, facing various mental health challenges such as anxiety, depression, and perceived stress due to academic pressures, social challenges, and the transition to adulthood. These difficulties have often been heightened for sexuality-diverse students, such as LGBTQ+ individuals, who have experienced additional stressors like discrimination and social exclusion. Research showed that the number of sexual minority students surpassed 10 million worldwide, accounting for over 10% of the total student population [
1]. Despite these figures, many higher education institutions continued to provide inadequate support for sexuality-diverse students [
2].
Thailand, a culturally diverse nation and a popular tourist destination, has been influenced by various cultural perspectives on sexuality and gender. Cultural beliefs significantly affect mental health perceptions, symptoms, and attitudes toward seeking help [
3]. Additionally, the rise of social media shaped students' psychological experiences by offering mental health resources and online communities while also exposing sexuality-diverse students to cyberbullying and discrimination, which negatively impacted their well-being [
4]. Sexuality-diverse students in Thailand continued to face societal stigma, a lack of anti-discrimination laws, limited legal protections for transgender individuals, and discrimination in education and employment, all of which contributed to their mental health struggles [
5].
Despite Thailand’s reputation for relative openness to sexual diversity, the country lacked strong legal protections and comprehensive advocacy for LGBTQ+ rights. Additionally, insufficient data existed on LGBTQ+ individuals' access to education, healthcare, economic opportunities, and personal safety [
6]. Social support played a critical role in mitigating mental health issues for sexuality-diverse students. Research suggested that support from family, friends, and educators was essential in promoting resilience and psychological well-being among LGBTQ+ students [
7]. However, many students continued to experience discrimination and social isolation, which exacerbated mental health challenges.
The number of people identifying as LGBTQ+ increased significantly among younger generations. In the United States, research indicated that Generation Z (born 1997–2002) had the highest proportion of LGBTQ+ individuals at 15.9%, compared to 9.1% of millennials, 3.8% of Generation X, 2% of baby boomers, and 1.3% of traditionalists [
8]. However, in many Asian societies, sexuality-diverse individuals continued to face discrimination, social isolation, school violence, and exclusion, all of which negatively impacted their mental health and well-being. Reports suggested that 30% of university students experienced stress, 22% struggled with anxiety, and 14% suffered from depression, all of which adversely affected academic performance [
9].
Sexual identity development differed between straight and sexuality-diverse individuals. Research suggested that LGBTQ+ individuals often experienced complex and less predictable identity formation processes due to societal stigma, identity exploration, and unsupportive environments [
10]. In contrast, straight individuals tended to follow more predictable developmental trajectories that aligned with societal norms and expectations. Despite these observed differences, limited research exists on sexual identity development in the Thai context.
Positive mental health outcomes have been closely linked to inner strength and resilience, which evolved over time-based on environmental, social, and psychological factors [
11]. Studies suggested that resilience and inner strength varied across different sexual orientations and gender identities. However, no conclusive evidence existed of significant mental health disparities between straight and sexuality-diverse individuals [
12]. More research remains necessary to explore these variations and develop targeted mental health interventions.
While extensive research had been conducted on LGBTQ+ mental health in Western contexts, studies focusing on Southeast Asia, particularly Thailand, remained limited. Given the differences in cultural values, social norms, and legal protections between Western and Thai societies, findings from Western studies might not have fully applied to Thailand. This study aimed to address this research gap by examining mental health disparities between straight and sexuality-diverse university students. The findings sought to contribute to the development of targeted interventions and policies to create a more inclusive academic environment and improve mental health support services for LGBTQ+ students.
2. Materials and Methods
2.1. Study Design and Setting
This study employed a cross-sectional survey design to compare mental health outcomes between straight and sexuality diverse university students at Chiang Mai University, Thailand. The research was conducted following ethical guidelines and best practices for mental health research among young adults. The study focused on identifying differences in both positive (resilience, inner strength, and perceived social support) and negative (depression, anxiety, and perceived stress) mental health outcomes between these groups.
Positive mental health outcomes: resilience, inner strength, perceived social support
Negative mental health outcomes: perceived stress, depression, anxiety
Baseline sociodemographic characteristics included age, sex, education level, relationship, income, parental attitude, parental marital status, parental occupation, history of mental health, social acceptance, and accepting and endorsing sexual stigma. The Attitudes Toward Lesbians and Gay Men Scale short version (ATLG-S), a five-item questionnaire with two sub-scales with each item rated on a 7-point Likert scale, was also used to assess social acceptance [
13]. The Thai version of the Internalized Sexual Stigma Scale (IHP) is a five-item questionnaire. Each item is rated on a 4-point Likert scale to evaluate the acceptance and endorsement of sexual stigma [
14].
Confounding factors (Covariates): Education level, income, age, sex, relationship, parental attitude, parental marital status, parental occupation, history of mental health, social acceptance, and accepting and endorsing sexual stigma.
2.2. Participants
This study included 442 university students aged 20–30 years from Chiang Mai University, Thailand. Participants were categorized into two groups: straight students (n = 229, 51.8%) and sexuality diverse students (n = 213, 48.2%), which included individuals identifying as lesbian, gay, bisexual, and other non-heterosexual orientations. The sample consisted predominantly of female participants (71.5%), with male and non-binary individuals representing the remaining proportion. The mean age of the participants was 21.05 years (SD = ±2.43). The majority of students were enrolled in undergraduate programs (95.2%), with a smaller percentage pursuing graduate degrees. Regarding financial background, most students reported monthly expenditures below 7,000 baht (52.7%), while others had moderate (7,000–10,000 THB) or high (>10,000 THB) financial expenses. More than half (57.75%) of the participants had no prior history of mental health issues. Participants were recruited through online university networks, student organizations, and academic departments, ensuring a diverse representation of sexual orientations. Informed consent was obtained prior to participation, and ethical approval was granted by the Ethics Committee, Faculty of Humanities, Chiang Mai University
, CMUREC 67/094. Additional demographic information is provided in
Table 1.
2.3. Procedure
Data were collected from May to August 2024 via an anonymous online survey (Microsoft Forms) shared on social media using a snowball sampling method. Ethical approval was obtained from the Faculty of Humanities, Chiang Mai University. Only Thai students aged 20–30 at Chiang Mai University were eligible, with screening criteria automatically applied. The survey included demographic questions and validated psychological assessments (OI-21, RI-9, ISBI, IHP, MSPSS, PSS-10, ATLG). Participants provided informed consent, and responses were tailored based on sexual orientation. To maintain balance, responses were monitored daily, pausing collection for overrepresented groups. Built-in security measures verified authenticity and removed incomplete or inconsistent responses [
15]. Participants who provided incomplete or inconsistent responses were removed from the final dataset. After completing the study, participants were thanked for their time and provided with mental health support resources if needed. The dataset was then finalized for further statistical analysis, ensuring that all ethical and confidentiality protocols were maintained throughout the research process.
2.4. Measures
This study employed standardized psychological assessments and a demographic questionnaire to examine mental health outcomes among straight and sexuality-diverse university students. The demographic questionnaire collected key information, including university affiliation, education level, age (20–30 years), biological sex, sexual orientation, relationship status, parental attitudes, parental marital status, parental occupation, and mental health history. Participants outside the inclusion criteria were excluded. Validated psychological scales were used to assess psychological well-being. The Outcome Inventory (OI-21) (α = 0.92) assessed the level of anxiety and depression [
16]. The Resilience Inventory (RI-9) (α = 0.89) assessed stress recovery [
17], while the Inner Strength-Based Inventory (ISBI) (α = 0.53) evaluated inner psychological strength [
18]. The Internalized Sexual Stigma Scale (IHP, Thai version) (α = 0.83) measured levels of internalized stigma in sexuality-diverse individuals [
14], and the Multidimensional Scale of Perceived Social Support (MSPSS, Thai version) (α = 0.93) assessed perceived emotional and practical support from family, friends, and significant others [
19]. Stress levels were evaluated using the Perceived Stress Scale (PSS-10) (α = 0.72) [
20], while attitudes toward sexuality diverse were assessed using the Attitudes Toward Lesbians and Gay Men Scale (ATLG) (α = 0.74) [
21], which was translated into Thai and validated before use. Assessments were administered via Microsoft Forms, with tailored questions tailored to individual sexual orientations. Pilot testing ensured feasibility and an automated verification system prevented fraudulent responses. Data collection was monitored daily to maintain a balanced recruitment process, and incomplete responses were excluded to ensure data integrity.
2.5. Data Analysis
Analyses were conducted using SPSS 26.0 (IBM Corp., Armonk, NY). Descriptive statistics summarized mental health variables, and an independent sample t-test assessed group differences. Multiple regression analyses identified predictors of mental health outcomes, controlling for confounders (p < 0.05).
Linear regression was applied to continuous outcomes, incorporating significant correlates identified in prior analyses. Three models controlled for increasing factors: (1) demographic and socioeconomic variables, (2) attitudes toward LGBTQ+ individuals and internalized homophobia, and (3) additional parental factors. Missing data were excluded, and effect sizes were calculated to assess practical significance.
4. Discussion
This study compared mental health outcomes between straight and sexuality-diverse university students in Thailand. It explored positive factors such as inner strength, resilience, and perceived social support, while also assessing negative outcomes like depression, anxiety, and perceived stress. The study identified mental health disparities between the groups, aligning with global research on LGBTQ+ well-being and highlighting unique challenges faced by sexuality-diverse students in Southeast Asia.
Interestingly, no significant difference in resilience was found between straight and sexuality-diverse students, suggesting similar coping abilities despite mental health disparities. Resilience, a key protective factor against perceived stress, anxiety, and depression [
22], helps individuals adapt to adversity. This aligns with research indicating that LGBTQ+ individuals benefit from social support networks that enhance resilience [
23,
24]. In Thailand, LGBTQ+ student groups and community resources likely contribute to this resilience [
25]. However, societal and familial pressures may undermine confidence in identity, highlighting the need for interventions to strengthen self-esteem and identity development [
26]. Resilience was linked to lower anxiety, depression, and perceived stress, yet sexuality-diverse students may experience reduced resilience due to minority stress and internalized stigma, weakening its protective effects [
4].
The findings support that perceived social support played a crucial role in mental health, with higher support linked to lower anxiety, depression, and perceived stress, as well as greater resilience and inner strength. Social support helps mitigate minority stress [
27,
28]. Yet sexuality-diverse students in Thailand may struggle to access it due to traditional family structures. Alternative sources, such as peer networks and spirituality, may aid resilience, though further research is needed [
29]. Cultural expectations around family, religion, and societal roles can create challenges for LGBTQ+ individuals [
5], underscoring the need for culturally sensitive mental health interventions to foster supportive environments.
Sexuality-diverse students reported significantly higher depression levels than their straight peers, aligning with minority stress theory, which links stigma and discrimination to mental health challenges [
4,
30]. Despite Thailand’s reputation for LGBTQ+ tolerance, deep-rooted cultural norms uphold heteronormativity, contributing to alienation [
5]. While most parents in this study were supportive, some were not, reflecting the complex reality of acceptance. Research highlights the contrast between Thailand’s perceived inclusivity and the actual stigmatization faced by LGBTQ+ individuals, particularly in education [
31]. These societal pressures likely contribute to the heightened anxiety, depression, and stress observed among sexuality-diverse students [
26].
The findings revealed that sexuality diverse students reported lower levels of resilience and inner strength compared to their heterosexual peers. Resilience, which embodies an individual’s empowerment, self-assurance, and capacity to overcome life’s challenges [
32], seemed to be diminished among sexuality-diverse students. While this difference didn't reach statistical significance (p = .213,
Table 3), it signals a potential area for further exploration.
Sexuality-diverse students exhibited higher levels of internalized homophobia (IHP) than their straight peers, with 41.0% reporting low IHP, while 36.7% of straight students showed moderate-to-high levels (p = .001). They also held more positive attitudes toward sexual minorities (p < .001). Parental support varied significantly, with fewer sexuality-diverse students (38.1%) reporting supportive parents compared to straight students (46.9%, p < .001), while a greater proportion faced unsupportive parental attitudes (10.2% vs. 4.8%). These findings align with the psychological mediation framework, suggesting that stigma and discrimination diminish resilience and self-esteem, leading to poorer mental health outcomes [
33,
34].
Mental health disparities were evident, particularly in depression and perceived social support. Sexuality-diverse students reported significantly lower social support across all models (Model 1: B = -0.105, p = .024; Model 2: B = -0.118, p = .016; Model 3: B = -0.100, p = .045), possibly due to peer rejection, institutional discrimination, or internalized stigma [
6]. Sexual orientation also emerged as a significant predictor of depression (B = 0.115, p = .020), even after adjusting for demographic factors, reinforcing evidence that LGBTQ+ youth face heightened depression risks due to minority stress [
35]. While anxiety and stress differences were less pronounced, sexuality-diverse students consistently reported higher mean scores (Anxiety: 8.99 ± 5.17 vs. 8.75 ± 4.96; Depression: 4.81 ± 4.34 vs. 3.94 ± 3.70; Perceived stress: 18.42 ± 6.49 vs. 18.53 ± 5.99,
Table 3), reflecting the cumulative burden of navigating a heteronormative society.
Unlike previous research emphasizing discrimination’s negative effects [
14], this study highlights protective factors such as resilience and inner strength. Despite reporting lower perceived social support (p = .009,
Table 3), sexuality-diverse students exhibited resilience levels comparable to their straight peers, suggesting that coping strategies and community support may buffer the psychological effects of minority stress. These findings expand on previous studies by empirically demonstrating how variations in social support influence university students' mental health in Thailand [
31].
4.1. Implications
The findings of this research suggest that university students who identify as sexuality diverse face a greater risk of mental health disparities, especially depression and lower perceived social support, compared to their heterosexual counterparts. These disparities underscore the need for targeted mental health initiatives and policy measures that address the specific challenges faced by this group.
Given the heightened vulnerability of sexuality diverse students to depression and lower social support, universities and policymakers need to adopt targeted mental health interventions to address these disparities. Suggested initiatives include: Improving LGBTQ+ inclusive mental health services by educating mental health practitioners on LGBTQ+ cultural competence. Establishing peer mentorship programs to bolster social support networks for sexuality diverse students. Introducing family acceptance programs to inform families about the importance of supporting their LGBTQ+ children. Reinforcing anti-discrimination policies within universities to foster safer and more inclusive educational environments.
4.2. Limitations
1)The study's sample was limited to university students in Thailand, so the findings may not apply to the broader sexuality diverse population in different age groups, educational settings, or geographic regions. 2) The study relied on self-reported data, which may introduce bias due to social desirability or inaccurate recall. This could lead to participants underreporting or overreporting mental health symptoms, resilience, or perceived social support, potentially affecting the accuracy of the findings. 3) Cultural factors unique to Thailand, such as the influence of Buddhism or specific societal norms, may have impacted the experiences of sexuality diverse individuals in ways not fully captured in the study. To gain a more comprehensive understanding of the mental health experiences of sexuality diverse individuals in Thailand, future research should consider longitudinal designs, larger and more diverse samples, and the inclusion of additional variables.
Author Contributions
Conceptualisation, methodology, formal analysis, writing—original draft preparation, J.L., C.S., T.W., C.R., A.O.A. and R.O.; writing—review and editing, J.L., C.S., T.W., C.R., A.O.A. and R.O.; visualisation, C.S. and T.W.; supervision, J.L., C.S. and T.W.; project administration, C.S. and T.W.. All authors have read and agreed to the published version of the manuscript.