Bisexual men are at increased risk for HIV compared to heterosexual men but unlikely to use pre-exposure prophylaxis (PrEP). Given that biases may influence whether bisexual men are prescribed PrEP, we examined whether medical students’ decision-making was influenced by the genders of a bisexual male patient’s partners. Medical students (N = 718) were randomized to one of nine conditions where they answered questions about a bisexual male patient after reviewing his electronic medical record. We manipulated the gender of his current partner (none, male, female) and the genders of his past partners (male, female, both). Current partners were described as living with HIV and not yet virally suppressed, past partners were described as being of unknown HIV-status, and condom use was described as intermittent with all partners. When the patient was not in a current relationship, perceived HIV risk and likelihood of prescribing PrEP were lowest if he only had female partners in the past. When he was in a current relationship, perceived HIV risk and likelihood of prescribing PrEP did not differ based on current or past partners’ genders. In addition, identification as a PrEP candidate, perceived likelihood of adherence, and perceived likelihood of engaging in condomless sex if prescribed were lower when the patient was not in a current relationship. Medical students appropriately prioritized the status of the partner living with HIV, but their decision-making was influenced by past partner genders when the patient was not in a current relationship. Medical students may require additional education to ensure they understand PrEP eligibility criteria and make decisions based on patients’ individual presentations.

与异性恋男性相比，双性恋男性感染 HIV 的风险更高，但不太可能使用暴露前预防 (PrEP)。鉴于偏见可能会影响双性恋男性是否接受 PrEP，我们检查了医学生的决策是否受到双性恋男性患者伴侣性别的影响。医学生（N = 718）被随机分配到九个条件之一，在这些条件下，他们在查看了一名双性恋男性患者的电子病历后回答了他的问题。我们操纵了他当前伴侣的性别（无，男性，女性）和他过去伴侣的性别（男性，女性，两者）。目前的伴侣被描述为感染艾滋病毒且尚未受到病毒抑制，过去的伴侣被描述为艾滋病毒状态未知，避孕套的使用被描述为与所有伴侣间歇性使用。当患者没有当前关系时，如果他过去只有女性伴侣，则感知到的 HIV 风险和开 PrEP 的可能性最低。当他处于当前关系中时，感知到的 HIV 风险和开具 PrEP 的可能性并没有因当前或过去伴侣的性别而异。此外，确定为 PrEP 候选人，当患者未处于当前关系中时，依从性的感知可能性以及如果规定进行无安全套性行为的感知可能性较低。医学生适当地优先考虑感染艾滋病毒的伴侣的地位，但当患者没有当前关系时，他们的决策会受到过去伴侣性别的影响。医学生可能需要额外的教育，以确保他们了解 PrEP 资格标准并根据患者的个人表现做出决定。但是当患者没有当前关系时，他们的决策会受到过去伴侣性别的影响。医学生可能需要额外的教育，以确保他们了解 PrEP 资格标准并根据患者的个人表现做出决定。但是当患者没有当前关系时，他们的决策会受到过去伴侣性别的影响。医学生可能需要额外的教育，以确保他们了解 PrEP 资格标准并根据患者的个人表现做出决定。