The GLMs showed that higher stigma score was associated with higher risk of anxiety and depression symptoms, and that higher anxiety and depression scores were both associated with increased risk to quality of life. Consistent with these findings, the SEM model also showed significant associations between stigma and both mental stress (anxiety and depression) and quality of life, and between mental stress (anxiety and depression) and quality of life. Moreover, the SEM indicated that the association between stigma and suicidal ideation was mediated by mental stress (anxiety and depression). To our knowledge, this study is the first to explore the relationship between stigma, mental stress (anxiety and depression) and quality of life among HIV-infected women.
In this study, we found that stigma is significantly associated with mental stress, including anxiety and depression. Similar associations have also been observed in other studies (10, 32–34). For example, a recent meta-analysis of people living with HIV reported that those diagnosed with anxiety or depression were 1.30 (95%CI: 1.16, 1.43) or 1.61 (95%CI: 1.38, 1.83) times more likely, respectively, to report HIV-related stigma (32). Felker-Kantor et al. conducted a longitudinal study in New Orleans and found that higher levels of HIV-related stigma were associated with anxiety symptoms (relative risk (RR) = 1.91, 95%CI: 1.17, 3.12) and depression symptoms (RR = 1.67, 1.25, 2.23) (34). One potential explanation for these findings is that HIV-related stigma can contribute to a sense of social isolation and perceived lack of social support, which subsequently exacerbates anxiety and depression symptoms (13, 35–36). While no significant association between HIV-related stigma and suicidal ideation was observed in the present study, several previous studies found that stigma might play an important role in suicidal ideation (10, 13). For example, a recent meta-analysis showed that HIV-infected patients who reported suicidal ideation were 1.83 (95%CI:1.24, 2.41) times more likely to report HIV-related stigma (10). The non-significant results in our study may be due to the limited sample size and the heterogeneity among participants, including rural and urban locations and varied cultural backgrounds.
Our study found that mental stress, specifically anxiety and depression, were associated with decreased quality of life of HIV-infected patients. Similar results were also found in previous studies (13, 37–39). For example, a cross-sectional study of 184 HIV-infected men who have sex with men showed that anxiety (OR = 2.7, 95%CI: 1.2, 6.1) and depression (OR = 2.6, 95%CI:1.1, 5.9) symptoms were all significantly associated with quality of life (39). A longitudinal study of 200 HIV-infected pregnant women in Tanzania found that higher anxiety and depression levels were associated with decreased quality of life (40). One reasonable explanation is that mental stress always co-exists with chronic medical conditions, treatment resistance and worse psychiatric outcomes, which may decrease quality of life among HIV-infected patients (39, 41).
While no significant direct effect was observed in this study, the SEM analysis found that stigma had a crucial indirect effect on quality of life by increasing the levels of mental stress among HIV-infected women. Several studies have also indicated that HIV-related stigma is one of the most important risks to quality of life among HIV-infected patients (13, 42–43). Several possible explanations might be noted. Firstly, HIV-related stigma can contribute to feelings of social isolation, subsequently exacerbates anxiety and depression symptoms, resulting in reduced quality of life (13, 36). Secondly, stigma might affect the self-esteem and social support of HIV-infected patients, accelerate anxiety and depression symptoms, and ultimately decrease quality of life (13). Overall, our study demonstrated that HIV-related stigma played a very critical role in mental stress and quality of life, and mental stress mediated in part the association between stigma and quality of life. As the duration of HIV infection increases, patients may have an increased understanding of the severity, high infectivity and the fact that there is no cure for AIDS, so they may feel less stressed and less worried about the disease. Different causes of infection also affect the psychological quality of life of patients. For example, an infection through blood donation may affect the patient’s perception of society, resulting in psychological disorders, and affecting the patient’s quality of life.
The greatest strength of this study is the two-stage statistical analysis we applied. Briefly, using GLM analysis we first examined the association between stigma and mental stress (anxiety and depression) or quality of life, and the association between mental stress and quality of life. Associations between stigma, mental stress (anxiety and depression) and quality of life were then explored using a SEM analysis. The results of GLM and SEM were consistent, indicating that they were robust. However, the study has several limitations. First, participants were recruited from two anti-AIDS virus treatment points in Xinjiang province of China. Further studies with more regions and a larger sample size are required to confirm our results. Second, stigma, mental stress, quality of life and other covariables were investigated using a self-administered questionnaire, with the possibility of reporting bias. However, the fact that the questionnaire was anonymous may have minimized this source of bias. Thirdly, quality of life was assessed using a 31-item questionnaire, but a more scientific measure such as the Columbia quality of life scale could provide a more comprehensive understanding of life among HIV-infected patients (44). Finally, the cross-sectional study design does not allow investigation of causal relationships between stigma, mental stress and quality of life. Longitudinal studies, such as cohort studies, are expected to confirm our findings in future.