Despite advancements in antiretroviral therapy (ART) that extend life expectancy, older adults with HIV (OAHIV) face elevated cardiovascular disease risks. This study examines the impact of arterial stiffness on health-related quality of life (HRQoL) among OAHIV in rural Northern Thailand. We conducted a 5-year prospective cohort study from 2015, including 338 OAHIV aged ≥ 50 without prior cardiovascular disease who received ART in 12 community hospitals in Chiang Mai. Arterial stiffness was assessed using Cardio-Ankle Vascular Index (CAVI), with values ≥ 8 indicating significant stiffness. HRQoL was measured using the MOS-HIV Health Survey at baseline, one year, and five years. Analysis adjusted for HIV/AIDS severity, cardiovascular comorbidities, and socioeconomic factors. Elevated CAVI (≥ 8) was associated with lower HRQoL scores. The elevated CAVI group showed lower physical health summary scores (average difference:-2.2 points, 95%CI: -3.5 to -0.9) and mental health summary scores (average difference: -1.2 points, 95%CI: -2.2 to -0.3) compared to the normal CAVI group (CAVI < 8). Findings highlight the importance of routine screening for arterial stiffness and support the implementation of comprehensive care strategies that incorporate cardiovascular risk management. Such approaches could guide public health interventions and clinical practices to enhance the overall health and well-being of OAHIV, potentially through targeted cardiovascular risk reduction programs and personalized care plans. However, the study's regional focus in rural Northern Thailand and participant attrition over the five-year period limit the generalizability of the findings. Future research in diverse settings with larger sample sizes is needed to confirm these results.
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