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P097 A mixed-method approach to mapping hematologists’ HIV testing behavior in lymphoma patients at the Amsterdam University Medical Centers

Background Compared to HIV-negative individuals, people living with HIV have a higher risk of malignant lymphoma. To what extent hematologists miss HIV testing opportunities among lymphoma patients (LP) in the Amsterdam University Medical Centers (UMC) is currently unknown. We quantified the HIV testing rate among LP and assessed factors influencing hematologists’ HIV testing behavior in LP at both Amsterdam UMC locations. Methods In this mixed-methods study, quantitative data from 2015 to 2019 from electronic health records of LP were retrospectively collected to assess both the HIV testing rate within three months around lymphoma diagnosis and the HIV positivity prevalence. An online survey among hematologists and semi-structured interviews among hematologists and authors of hematology guidelines were conducted. Results Data from 656 LP and 21 hematologists who responded to the survey out of 40 were used. Interviews were held with four hematologists and two authors of hematology guidelines. The HIV testing rates were 56.4% and 57.6%, and the HIV positivity prevalences were 0.8% and 0.9% for both locations. Eighty-five percent (18/21) of hematologists indicated they often offered an HIV test to LP in the past year, and 42% (9/21) revealed HIV testing in LP is often discussed in their department. The type of lymphoma, lack of awareness regarding HIV testing recommendations in LP, low perceived risk of HIV among LP because of older age, and lack of guidelines recommending universal HIV testing regardless of lymphoma type, each influenced hematologists’ HIV testing behavior. Conclusion Our results show routine HIV testing among LP and hematologists’ attitudes and knowledge towards testing at the Amsterdam UMC are suboptimal, despite HIV testing being recommended in most lymphoma guidelines. This highlights the need for interventions to improve hematologists’ behavior towards testing, such as education, as well as expansion and enhanced implementation of the hematology guidelines.