Mental health and cognition in relation to adherence to antiretroviral therapy among people living with HIV in Kazakhstan: a cross-sectional study

Introduction: There is a research gap in how mental health and cognition are associated with antiretroviral treatment (ART) adherence among people living with HIV (PLWH) in Kazakhstan. Methods: We randomly selected and enrolled 230 PLWH from the Almaty City AIDS Center registry (June-November 2019) into a cross-sectional study. We examined associations between self-reported ART adherence for the last 1 and 2 weeks; the Adherence Self-Efficacy Scale (ASES) and symptoms of depression (Patient Health Questionnaire-9 [PHQ-9]), anxiety (Generalized Anxiety Disorder tool [GAD-7]), post-traumatic stress disorder (PTSD Checklist [PTSD]); cognitive function (PROMIS v2.0 Adult Cognitive Function 8a short form) and forgetfulness (Forgetfulness Assessment Inventory). We used cut points of >= 5 for at least mild and >= 10 for at least moderate symptom severity for PHQ-9 and GAD-7 and of >= 44 for PTSD. Logistic and linear regression analyses were used. Results: Participants' median age was 40.0 (IQR: 34-47) with 40.9% (n = 94) of females in the sample. Those who missed at least one pill for the last 2 weeks had higher odds of reporting at least mild depression (aOR = 3.34, 95% CI: 1.22-9.11, p < 0.05); mild anxiety (aOR = 3.27, 95% CI: 1.20-8.92, p < 0.05); and PTSD (aOR = 4.04, 95% CI: 1.15-14.21, p < 0.05) symptoms. Participants who missed at least one pill for the last week had higher odds of at least mild depression (aOR = 7.74, 95% CI: 1.31-45.7, p < 0.05), moderate anxiety (aOR = 21.33, 95% CI: 3.24-140.33, p < 0.005) and PTSD (aOR = 13.81, 95% CI: 2.36-80.84, p < 0.005) symptoms. Participants with better cognitive function had lower odds of non-adherence over the last week (aOR = 0.88, 95% CI: 0.81-0.96, p < 0.005) and higher ASES scores (beta = 0.26, 95% CI: 0.13-0.40, p < 0.005). Poor memory was associated with higher odds of non-adherence over the last week (aOR = 4.64, 95% CI: 1.76-12.24, p < 0.005) and lower ASES score (beta = -0.31, 95% CI: -0.45 to 0.16, p < 0.005). Those who had at least mild depression (beta = -0.21, 95% CI: -0.35 to -0.07, p < 0.005); moderate anxiety (beta = -0.21, 95% CI: -0.34 to -0.07, p < 0.005) and PTSD (beta = -0.19, 95% CI: -0.33 to -0.05, p < 0.005) symptoms had lower ASES scores. Conclusions: Depression, anxiety and PTSD symptoms, poorer cognition, and forgetfulness were associated with poorer ART adherence and worse adherence self-efficacy. It is crucial to assess and treat mental illness and provide support for PLWH with worsened cognition to enhance ART adherence.