Introduction

Preexposure prophylaxis (PrEP) is highly effective at decreasing HIV incidence in populations with high rates of new infections [1•, 2]. However, PrEP uptake has been limited in several key populations in the USA, including Black and Latinx men who have sex with men (MSM), transgender persons, cisgender Black women, and people who inject drugs [3, 4•, 5]. Several barriers to PrEP use exist, including that many individuals who are likely to benefit from using PrEP are unaware of PrEP; have concerns about its effectiveness, safety, or cost; or may not accurately assess their own risk for HIV infection [6,7,8,9]. In addition, many healthcare providers lack the knowledge and skills needed to identify individuals with clinical indications for PrEP and to prescribe PrEP, and they may share patients’ concerns about its use [8, 10••, 11, 12]. Improving patients’ and providers’ knowledge of PrEP and helping them to make informed decisions about its use may overcome these significant barriers to PrEP utilization.

Shared decision-making is a process that involves bidirectional exchange of information between patients and providers to support patients in making individualized, evidence-based decisions about their healthcare [13,14,15]. Nearly two decades ago, the Institute of Medicine (now the National Academy of Medicine) recognized a need for greater patient autonomy in healthcare and recommended shared decision-making as an optimal practice [16]. Shared decision-making is particularly important for healthcare decisions for which there is not a single “best” option for all patients—known as preference-sensitive decisions—so that patients can make choices that are congruent with their personal values. In practice, shared decision-making occurs on a continuum of decisional responsibility, with decisions made in full by clinicians or by patients at the extremes [17], depending on each patient’s preferred degree of responsibility. Because decisions about sexual healthcare are preference-sensitive and deeply personal [18], patient-led decision-making may represent the ideal approach for PrEP.

In this review, we explore frameworks for patient-led decision-making and how they apply to PrEP, assess the extent to which patient-led decision-making occurs for PrEP, and summarize research about decision-support interventions to promote informed decisions about PrEP. We discuss challenges and opportunities for implementing patient-led decision-making for PrEP and suggest that universal offering of PrEP represents an optimal approach to maximizing patient autonomy in decisions about PrEP use.

What Is Patient-Led Decision-Making?

The goal of shared decision-making is to assess each patient’s values and preferences that are pertinent to a specific healthcare decision and then ensure that final decisions are congruent with these values. A systematic review of shared decision-making studies summarized the “essential elements” for providers to engage in shared decision-making with patients [19]. These elements include defining a health-related problem, reviewing benefits and downsides of treatment options, eliciting a patient’s values and preferences, assessing their ability to implement treatment options, providing a clinical recommendation, clarifying patient understanding, and enacting a treatment decision. For PrEP, this might include a discussion about HIV risk and prevention options to decrease risk (including PrEP), discussing patients’ perspectives on different options and the likelihood they could access and adhere to each option, confirming that patients have an accurate understanding of the options, and prescribing PrEP or providing another preferred prevention option.

Patient-led decision-making is a type of shared decision-making that distinguishes itself in two ways. First, it represents an approach that is most appropriate for decisions characterized by equipoise, meaning that one or more options exist that are equally valid, such that an individual’s preferences are the optimal determinants of choice [20]. Second, it is a process in which the patient (and not the provider) has most if not all of the decisional responsibility [17]. In addition to the essential elements for shared decision-making, patient-led decision-making ideally includes eliciting comprehensive details about patients’ health-related behaviors and providing patients with unbiased information about options, so that providers and patients can be confident that true equipoise exists among options for each patient [19]. Additional ideal features of patient-led decision-making include establishing mutual respect with patients and employing a flexible and individualized approach to the decision-making process [19]. For PrEP, this could include eliciting a comprehensive sexual health history, reviewing behavioral and structural determinants of HIV risk (e.g., HIV incidence by zip code), using culturally sensitive and nonjudgmental language [21], and modifying the information exchange and decision-making processes based on each patient’s health literacy and numeracy. For HIV prevention, some individuals may not be aware of their vulnerability to HIV acquisition or might not disclose information about stigmatized behaviors that are associated with HIV exposure, such as injection drug use or sex work, because of the concerns about discrimination from providers. Thus, it is important for clinicians to provide information about PrEP and other preventive options to all patients regardless of the behaviors they disclose, to avoid missed opportunities for patients to learn about and request PrEP. Table 1 summarizes the essential and ideal elements of patient-led decision-making and describes their application to PrEP.

Table 1 Essential and ideal elements of patient-led decision-making for HIV preexposure prophylaxis

Patient-Led Decision-Making for PrEP: Does It Happen in Clinical Practice?

To understand the need for interventions to facilitate patient-led decisions about PrEP, it is important to know how often this process is already occurring between patients and providers who discuss PrEP. Studies suggest that shared decision-making in general, and patient-led decision-making more specifically, does not commonly occur during clinical encounters for which they would be appropriate. This may be due to lack of provider training and skills in effective communication, time constraints, and a lack of tools to support these processes [22,23,24]. There are limited data on the extent to which shared or patient-led decision-making occur for PrEP. Many providers have limited knowledge about, experience with, and skills related to PrEP [8, 10••, 25, 26, 27 and 28••], suggesting that they are inadequately prepared to engage in shared or patient-led decision-making. Thus, strategies to implement patient-led decision-making for PrEP are needed, with improvements in providers’ knowledge and skills with PrEP as a fundamental priority.

Haynes’s conceptual model of shared decision-making [29] provides a general framework for ways to facilitate patient-led decision-making that can be applied to PrEP. The three major domains of this framework include (1) improving patients’ knowledge of the clinical evidence about treatment options, including data on the risk of harms and benefits for each option; 2) helping patients to clarify their values and preferences around the use of each option; and 3) helping patients to integrate information about their overall clinical state (e.g., comorbidities) and circumstances (e.g., financial constraints) when deciding among options. The model further posits that providers must possess clinical expertise to help patients successfully integrate these domains as part of the decision-making process.

Improving Knowledge of PrEP to Facilitate Patient-Led Decision-Making

Awareness and use of PrEP among patients have increased over the past several years in some key populations, including urban MSM [5]. However, knowledge remains limited in other populations, such as people who inject drugs [4, 8, 30], Black and Latinx populations [31], and heterosexuals in urban centers [31, 32], suggesting that most individuals from these groups will need education about PrEP during discussions with providers.

A large body of evidence from extensive clinical research on PrEP can inform patients’ decisions, if this evidence is provided to patients in an accessible and comprehensible format. Over the past decade, multiple randomized and observational studies have demonstrated that a fixed-dose combination tablet containing two antiretroviral medications, tenofovir disoproxil fumarate and emtricitabine (TDF-FTC), is safe and highly effective at preventing HIV acquisition when used with high adherence [2, 33,34,35,36,37]. Most frontline providers will have limited knowledge of these studies because of a lack of experience with HIV and PrEP [10, 28] and may benefit from trainings and tools to help them summarize the research evidence during discussions with their patients. Similarly, because patients vary in their health literacy, numeracy, and knowledge of PrEP, culturally tailored tools that summarize information about PrEP for diverse patient populations are needed to facilitate informed decision-making.

The recent approval of a second daily oral medication for use as PrEP, tenofovir alafenamide with emtricitabine (TAF-FTC), heightens the challenge in providing patients with clinical evidence that is relevant to their individual circumstances. This new option was approved for use as PrEP in October 2019 based on safety and efficacy data from the DISCOVER study, a randomized study that demonstrated that TAF-FTC was non-inferior to TDF-FTC as daily PrEP among MSM and transgender women [38, 39]. Because the DISCOVER study did not enroll other populations, such as cisgender women and transgender men, TAF-FTC was approved as PrEP only for individuals who do not engage in receptive vaginal sex [40]. The DISCOVER study also demonstrated different safety profiles between the two medications, with TAF-FTC being associated with slightly more favorable renal and bone biomarkers but also incrementally more weight gain and dyslipidemia as compared to TDF-FTC. Thus, providers and patients need to understand the complexities of the clinical evidence and prescribing indications for these two PrEP medications for effective and individualized decision-making to occur.

The future availability of additional PrEP options will further increase the need for providers to distill the expanding research evidence on PrEP for their patients. For example, an on-demand PrEP regimen, where patients take a short course of TDF-FTC PrEP shortly before and after the time of sex, is also efficacious for MSM and recommended by the World Health Organization [41] but has not been studied or recommended for use in other populations, such as people who have vaginal sex. Importantly, pharmacokinetic data on TDF in the vagina suggests that this regimen may not provide similar protection [42]. An intravaginal ring that elutes dapivirine, a nonnucleoside reverse transcriptase inhibitor, was modestly effective at decreasing HIV incidence among cisgender women in Africa [43, 44]. In July 2020, this formulation received a positive scientific opinion from the European Medicines Agency [45], which will pave the way for World Health Organization guidelines on its use and additional national regulatory reviews, including by the US Food and Drug Administration [46]. A randomized study recently demonstrated that a bimonthly injection of a long-acting formulation of cabotegravir, an HIV integrase inhibitor, was safe and superior in efficacy compared to daily oral TDF-FTC among MSM and transgender women [47]. This regimen will likely be available for prescribing in the near future, pending the completion of a study of cabotegravir among cisgender women in Africa. The availability of multiple formulations of PrEP will bring up new considerations for patient choice, such as preferences around self-administered pills or intravaginal rings versus clinician-administered injections, quarterly clinical visits for oral or topical PrEP versus bimonthly visits for injections, and the discomfort of injections versus the need to ingest pills or insert rings.

Universal Offering of PrEP

An ideal way to ensure that patients are informed about PrEP and have an opportunity to make decisions about its use is for providers to discuss and offer PrEP to all patients as part of routine preventive healthcare [48•]. Universal offering of PrEP would provide each patient with a chance to learn about PrEP, exchange information with providers about benefits and downsides, and decide whether or not to initiate a prescription. Discussing PrEP with all patients, regardless of whether they have disclosed risk factors for HIV acquisition, could also mitigate providers’ implicit bias in PrEP offerings [49, 50] and therefore potentially improve equity in PrEP provision [51]. While a universal approach to offering PrEP is aspirational, there are practical challenges to its implementation, such as needing all primary care providers to be knowledgeable about PrEP, prepared to discuss PrEP within the time available for preventive healthcare, and willing to prescribe or refer. One way to encourage more routine discussion of PrEP would be to draw on providers’ experiences with and strategies for counseling on contraception [52]. Because preventive care for HIV and pregnancy are both components of sexual healthcare and include multiple bio-behavioral options (e.g., oral chemoprophylaxis, barrier protection), providers may feel comfortable adapting communication techniques, including patient-led decision-making, from contraceptive counseling when discussing PrEP [18, 53,54,55,56].

Integrating Patients’ Values, Preferences, and Health Considerations to Individualize PrEP Decisions

Because individual patients are likely to differ in their perspectives and preferences around PrEP options, patient-led decisions will require effective ways for patients to clarify and integrate their values, preferences, and relevant health considerations when deciding about PrEP. Patients’ values and preferences around PrEP use may be influenced by many factors, such as their cultural background and peer norms, concerns about stigma (e.g., being judged for using PrEP), medical and pharmaceutical mistrust, and their sexual partnerships and behaviors [9, 11, 57]. For example, patients may be motivated to use PrEP because of positive experiences among peers, but they may also be cautious about PrEP after encountering misinformation about its safety on trusted social media platforms [58•], resulting in decisional conflict that well-trained providers could help patients to understand and work to resolve. For providers who elicit values from patients, it is of utmost importance that they do so in a nonjudgmental manner, so that patients will feel comfortable providing an unbiased assessment of their values, which in turn can improve the likelihood that their final decision is congruent with their preferences.

Patients and providers will need to collaborate to integrate information about each patient’s personal health status and social circumstances when considering PrEP use. Providers can use their medical expertise to help patients identify pertinent health considerations when choosing among prevention options, such as medical comorbidities (e.g., renal, bone, or metabolic conditions) that could affect the safety of PrEP, drug interactions between PrEP and other medications, and pregnancy or lactational status. Substance use and mental health conditions [59] are common among people who use PrEP and could result in barriers to adherence for some individuals [60, 61], so providers can also support patients by offering examples of strategies to successfully use PrEP in the context of these conditions [62, 63] (and by prescribing or referring patients for treatment). In addition, providers can assist patients in navigating external circumstances that might influence decisions about PrEP use, such as financial, insurance, or social barriers. For example, providers can connect patients to financial assistance programs if patients have difficulties in affording co-payments for PrEP [6], refer patients experiencing homelessness for housing support, in turn potentially mitigating structural vulnerabilities to HIV and facilitating adherence to PrEP, or provide suggestions for how patients can negotiate PrEP use with sexual partners. If patients receive the support they need to access and adhere to PrEP, they may be better positioned to base decisions about PrEP use on their personal preferences instead of external factors, which could improve satisfaction with their decisions.

Decision-Support Interventions for PrEP

For patients to make decisions about PrEP options that resonate with their values, they may benefit from interventions to help with the processing, weighing, and balancing of these options that occur in the final steps of the decision-making process. Moreover, because patients and providers will need to integrate evolving clinical evidence about PrEP options as well as each patient’s personal preferences, health status, and social circumstances—often within the time constraints of brief clinical encounters—there is a need for interventions that can optimize the efficiency of decision-making. An example of this type of intervention would be task-sharing, such as having patients begin the process of information exchange and deliberation with health educators and then concluding with a brief encounter with a provider to enact a decision.

An additional strategy that can potentially improve efficiency and effectiveness is the use of clinical decision aids, which are tools designed to facilitate informed decision-making in healthcare. These tools vary in their format (e.g., online, paper-based), their intended end users (e.g., patients, providers, or both), and their topic area (e.g., treatment or prevention). Clinical decision aids have been developed for many preventive healthcare decisions, including decisions about use of prophylactic medications. Examples include helping individuals to choose among contraception options [64] or whether or not to use statin medications for cardiovascular disease prevention [65]. A comprehensive review found that clinical decision aids tended to help patients to feel more knowledgeable, better informed, and clearer about what matters most to them; they also helped patients have more accurate risk perceptions and a more active role in decision-making [66••], all of which can support patient-led decision-making.

Few evidence-based clinical decision aids have been created for PrEP. An online clinical decision aid to help MSM and their primary care providers decide whether or not to initiate PrEP was developed using the Ottawa Decision Support Framework, a rigorous developmental processes that draws upon concepts from psychology, decision analysis, social support, and economic theory to support patient-centered decisions [67]. This clinical decision aid integrated an individualized HIV risk assessment tool based on prior sexual behaviors and sexually transmitted infections [68] and values clarification exercises about PrEP, such as reflections on how desirable or undesirable it would be to attend follow-up PrEP visits with providers every 3 months. In a pilot study, the decision aid was acceptable to patient and provider participants, improved knowledge about PrEP for these groups, and helped patients feel better prepared to decide whether or not to initiate PrEP [69, 70]. An additional decision aid is being developed using a framework of trauma-informed care to support cisgender women in patient-led decisions about PrEP [71] . Ideally, decision-support tools such as these will be easily modified and updated as new PrEP modalities and new data about the advantages and drawbacks of each modality become available, so that patients and providers can access up-to-date information as they approach decisions about PrEP use. Full-scale studies to test the impact of these decision-support interventions on shared and patient-led decision-making and clinical outcomes for PrEP are needed to inform whether and how to implement these strategies in clinical settings. These studies would ideally measure not only how these tools impact PrEP prescriptions but of equal importance would be how they affect patient experience, including satisfaction with the decision-making process.

While patient-led decision-making may represent the ideal approach for PrEP, providers may have misgivings about honoring patients’ decisions to use PrEP. Some providers have delayed PrEP provision or refused to prescribe PrEP despite direct requests from patients because of their own biases or preconceived notions [72•, 73•], such as inaccurate assumptions that increased condomless sex with PrEP use could increase HIV transmission [12, 45], representing a major threat to patient autonomy. Thus, it will be important for medical opinion leaders and public health authorities to provide clinicians and communities with accurate information on the benefits and risks of PrEP, address misconceptions about PrEP that could deter prescribing behaviors, and disseminate unequivocal guidance that patient-led decision-making represents the best practice for PrEP.

Conclusion

Shared decision-making is the optimal approach for preference-sensitive healthcare decisions, and patient-led decision-making, which maximizes patient autonomy, is well-suited for PrEP. Because many providers and patients lack knowledge of PrEP and have not been prepared to engage in patient-led decision-making about its use, strategies are needed to improve the frequency and quality of this process in clinical settings. Clinical decision aids are being developed for PrEP and merit rigorous testing to assess their impact on decisional processes and clinical outcomes, including patient satisfaction with their decisions. These interventions will need to be adaptable for the diverse populations that could benefit from PrEP, efficient for clinic staff and patients who have limited time during clinical encounters, and flexible to account for new PrEP information and modalities. Universal offering of PrEP during preventive healthcare, which can be achieved if providers adapt successful communication strategies from contraceptive counseling, could increase opportunities to provide PrEP. If patient-led decision-making can be implemented for PrEP, it has the potential to improve PrEP uptake across diverse patient populations, which could help achieve the goal of ending the HIV epidemic in the USA by 2030.