Interest In and Uptake of HIV Pre-Exposure Prophylaxis (PrEP): A Cross-Sectional Study of High-Risk Patients in Western Canada

Abstract

Rationale Pre-exposure prophylaxis (PrEP) is a highly effective, evidence-based HIV prevention strategy. However, its use in the city of Saskatoon, Saskatchewan province of western Canada, is relatively new. Therefore, this study aimed to examine the interest and uptake of PrEP and investigate factors associated with HIV PrEP by high-risk patients. Methods A cross-sectional, self-administered survey of patients attending Saskatoon's Public Health Services Sexual Health Clinic was conducted from October until December 2018. The primary outcome was the interest in taking PrEP to reduce the risk of HIV infection. This outcome was evaluated for its association with potential correlates, which included: sociodemographic characteristics, HIV risk perception, prior PrEP awareness, and sexual behaviors/lifestyles. Descriptive, univariate, and multivariate analyses were used to pursue our research objectives. Results One hundred forty-one participants were recruited from a sexual health clinic in Saskatoon. The median age (interquartile range) was 26 (22-31) years. The median number of partners (interquartile range) was 3 (2-4) partners. A total of 66.0% of participants were unaware of PrEP, and almost half ( 49.6%) indicated an interest in taking PrEP. Among those disinterested in PrEP, 49.3% perceived minimal HIV risk, 35.2% expressed concern regarding side effects, 28.1% cited the added need for condom use, 23.9% indicated incomplete effectiveness, and 22.5% did not wish to undergo regular bloodwork. Multivariate analysis showed that interested patients were more likely to have been previously aware of PrEP (OR: 2.6, p-value = 0.03), perceived themselves to be vulnerable to HIV (OR: 15.7, p = <0.0001), or were unsure about their risk (OR: 3.9, p = 0.001). Conclusion This study suggests that a lack of knowledge regarding personal HIV risk and PrEP as a preventive option may influence PrEP interest. There lies a need for more health promotion campaigns around the health benefits of PrEP, including literacy efforts on HIV risk, concerns around side effects, and associated blood work with PrEP use.

Keywords: canada; hiv risk perception; hiv/aids; pre-exposure prophylaxis; prep awareness; prep interest; sexual behaviour.

Figure 1. Study survey instrument.