Reduced economic burden of AIDS-defining illnesses associated with adherence to antiretroviral therapy

Han Siong Toh, Chun Ting Yang, Kai Li Yang, Han Chang Ku, Chia Te Liao, Shihchen Kuo, Hung Jen Tang, Wen Chien Ko, Huang Tz Ou, Nai Ying Ko

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Abstract

Objectives: We assessed the economic burden of AIDS-defining illnesses (ADIs), which was further stratified by adherence to antiretroviral therapy (ART). Methods and materials: A nationwide longitudinal cohort of 18,234 incident cases with HIV followed for 11 years was utilized. Adherence to ART was measured by medication possession ratio (MPR). Generalized estimating equations modeling was used to estimate the cost impact of ADIs. Results: Having opportunistic infections increased the annual cost by 9% (varicella-zoster virus infection) to 98% (cytomegalovirus disease), while the annual costs increased by 26% (Kaposi's sarcoma) to 95% (non-Hodgkin's lymphoma) in the year when AIDS-related cancer occurred. ADIs occurred more frequently in the years with low adherence for ART compared to the high-adherence years (e.g., 0.1 ≤ MPR < 0.8 vs. MPR ≥ 0.8, event rate of cytomegalovirus disease 4.03% vs. 0.51%). The annual baseline costs in the years with MPR < 0.1, 0.1 ≤ MPR < 0.8, and MPR ≥ 0.8 were $250, $4,752, and $8,990 (in 2018 USD), respectively. The economic impact of ADIs in the years with low adherence (MPR < 0.1) was larger than that in the high-adherence years (MPR ≥ 0.8) (e.g., MPR < 0.1 vs. MPR ≥ 0.8, annual cost increased by 244% vs. 9% when candidiasis occurred). Conclusions: Adherence to ART may increase the baseline medical costs but mitigate the incidence and economic burden of ADIs.

Original languageEnglish
Pages (from-to)44-49
Number of pages6
JournalInternational Journal of Infectious Diseases
Volume91
DOIs
Publication statusPublished - 2020 Feb

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All Science Journal Classification (ASJC) codes

  • Microbiology (medical)
  • Infectious Diseases

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