Acceptability of hypertension screening in pharmacies participating in May Measurement Month

Tsuyuki R., Gysel S., Lee T.

Objective: Elevated blood pressure (BP) is the largest contributing risk factor for premature death and disability. Approximately 50% of individuals with hypertension are unaware they have the condition; therefore, BP screening is essential. Canadian health professionals have previously participated in the annual global BP screening campaign, May Measurement Month (MMM); however this has never been completed in community pharmacies, which have the advantage of being highly accessible to the public. Our objective was to examine the prevalence of elevated (BP) in Alberta (AB), British Columbia (BC), Newfoundland and Labrador (NL) during MMM 2023. Design and method: This cross-sectional study enrolled consenting members of the general public 18 years of age, recruited through signage, media and social media. Data collection took place between May 1 and July 31, 2023 in 52 community pharmacies across AB, BC, and NL. Participants completed a questionnaire that included demographic information, medical history, and use of antihypertensives. Pharmacy personnel completed 3 blood pressure readings, with readings 2 and 3 used to estimate BP. We used an automated blood pressure device recommended by Hypertension Canada's Device Recommendation Program. Elevated BP was defined as >140/90mmHg or >130/80mmHg for individuals with diabetes. Results: We enrolled 736 participants. The mean age of participants was 52 (SD 18.6) years, 66% were female, 34% had a history of hypertension, and 14% had diabetes. Overall, 21% (152/733) had elevated BP. In subgroups of interest, elevated BP was found in 20% (96/480) of females, 35% (88/251) of those with a history of hypertension (13% (64/482) in those with no history of hypertension), and 52% (53/103) in those with diabetes. Conclusions: Identifying individuals with elevated BP is the starting point for better BP management. Community pharmacy screening of BP was effective in identifying individuals with elevated BP warranting further assessment. Our experiences from MMM 2023 will guide the future scale-up of a national community pharmacy-based screening program for MMM 2024.

Dixon D.L., Johnston K., Patterson J., Marra C.A., Tsuyuki R.T.

ImportancePharmacist-led interventions can significantly improve blood pressure (BP) control. The long-term cost-effectiveness of pharmacist-prescribing interventions implemented on a large scale in the US remains unclear.ObjectiveTo estimate the cost-effectiveness of implementing a pharmacist-prescribing intervention to improve BP control in the US.Design, Setting, and ParticipantsThis economic evaluation included a 5-state Markov model based on the pharmacist-prescribing intervention used in The Alberta Clinical Trial in Optimizing Hypertension (or RxACTION) (2009 to 2013). In the trial, control group patients received an active intervention, including a BP wallet card, education, and usual care. Data were analyzed from January to June 2023.Main Outcomes and MeasuresCardiovascular (CV) events, end-stage kidney disease events, life years, quality-adjusted life years (QALYs), lifetime costs, and lifetime incremental cost-effectiveness ratio (ICER). CV risk was calculated using Framingham risk equations. Costs were based on the reimbursement rate for level 1 encounters, medication costs from published literature, and event costs from national surveys and pricing data sets. Quality of life was determined using a published catalog of EQ-5D utility values. One-way sensitivity analyses were used to assess alternative reimbursement values, a reduced time horizon of 5 years, alternative assumptions for BP reduction, and the assumption of no benefit to the intervention after 10 years. The model was expanded to the US population to estimate population-level cost and health impacts.ResultsAssumed demographics were mean (SD) age, 64 (12.5) years, 121 (49%) male, and a mean (SD) baseline BP of 150/84 (13.9/11.5) mm Hg. Over a 30-year time horizon, the pharmacist-prescribing intervention yielded 2100 fewer cases of CV disease and 8 fewer cases of kidney disease per 10 000 patients. The intervention was also associated with 0.34 (2.5th-97.5th percentiles, 0.23-0.45) additional life years and 0.62 (2.5th-97.5th percentiles, 0.53-0.73) additional QALYs. The cost savings were $10 162 (2.5th-97.5th percentiles, $6636-$13 581) per person due to fewer CV events with the pharmacist-prescribing intervention, even after the cost of the visits and medication adjustments. The intervention continued to produce benefits in more conservative analyses despite increased costs as the ICER ranged from $2093 to $24 076. At the population level, a 50% intervention uptake was associated with a $1.137 trillion in cost savings and would save an estimated 30.2 million life years over 30 years.Conclusion and RelevanceThese findings suggest that a pharmacist-prescribing intervention to improve BP control may provide high economic value. The necessary tools and resources are readily available to implement pharmacist-prescribing interventions across the US; however, reimbursement limitations remain a barrier.

El-Den S., Lee Y.L., Gide D.N., O'Reilly C.L.

Introduction Community pharmacists are among the most accessible healthcare providers. Community pharmacist-led screening may facilitate the early detection of illnesses/medical risk factors, optimizing health outcomes. However, it is important to assess the acceptability of screening services to ensure uptake by key stakeholders. The aim of this review was to explore the acceptability of community pharmacist-led screening by all stakeholders (i.e., patients, pharmacists, and other healthcare professionals) and identify the methods used to evaluate the acceptability of screening. Methods A systematic search was conducted in Embase, MEDLINE, International Pharmaceutical Abstracts, and Scopus in April 2020 since inception. Studies that explored the acceptability of pharmacist-led screening for any risk factor/medical condition(s) within community pharmacies were included. Results A total of 44 studies met the inclusion criteria. A total of 17 studies identified community pharmacies as appropriate screening locations. Seven studies reported that patients were comfortable with participating in pharmacist-led screening. Eight studies explored acceptability from the perspective of medical practitioners and other healthcare professionals, with 6 reporting high recommendation acceptance rates and/or acceptability of pharmacist-led screening. Barriers to pharmacist-led screening included time and privacy constraints, whereas adequate remuneration was considered an important enabler. Discussion Community pharmacist-led screening appears to be acceptable to patients, pharmacists, and other healthcare professionals. However, no uniform psychometrically sound measure of acceptability was used consistently across studies, rendering comparisons difficult and showing the need for future research exploring the psychometric properties of acceptability measures. Findings, including barriers and enablers to pharmacist-led screening, are important to consider when providing screening services in community pharmacies.

Marra C., Johnston K., Santschi V., Tsuyuki R.T.

Background: More than half of all heart disease and stroke are attributable to hypertension, which is associated with approximately 10% of direct medical costs globally. Clinical trial evidence has demonstrated that the benefits of pharmacist intervention, including education, consultation and/or prescribing, can help to reduce blood pressure; a recent Canadian trial found an 18.3 mmHg reduction in systolic blood pressure associated with pharmacist care and prescribing. The objective of this study was to evaluate the economic impact of such an intervention in a Canadian setting. Methods: A Markov cost-effectiveness model was developed to extrapolate potential differences in long-term cardiovascular and renal disease outcomes, using Framingham risk equations and other published risk equations. A range of values for systolic blood pressure reduction was considered (7.6-18.3 mmHg) to reflect the range of potential interventions and available evidence. The model incorporated health outcomes, costs and quality of life to estimate an overall incremental cost-effectiveness ratio. Costs considered included direct medical costs as well as the costs associated with implementing the pharmacist intervention strategy. Results: For a systolic blood pressure reduction of 18.3 mmHg, the estimated impact is 0.21 fewer cardiovascular events per person and, discounted at 5% per year, 0.3 additional life-years, 0.4 additional quality-adjusted life-years and $6,364 cost savings over a lifetime. Thus, the intervention is economically dominant, being both more effective and cost-saving relative to usual care. Discussion: Across a range of one-way and probabilistic sensitivity analyses of key parameters and assumptions, pharmacist intervention remained both effective and cost-saving. Conclusion: Comprehensive pharmacist care of hypertension, including patient education and prescribing, has the potential to offer both health benefits and cost savings to Canadians and, as such, has important public health implications.

Sekhon M., Cartwright M., Francis J.J.

It is increasingly acknowledged that ‘acceptability’ should be considered when designing, evaluating and implementing healthcare interventions. However, the published literature offers little guidance on how to define or assess acceptability. The purpose of this study was to develop a multi-construct theoretical framework of acceptability of healthcare interventions that can be applied to assess prospective (i.e. anticipated) and retrospective (i.e. experienced) acceptability from the perspective of intervention delivers and recipients. Two methods were used to select the component constructs of acceptability. 1) An overview of reviews was conducted to identify systematic reviews that claim to define, theorise or measure acceptability of healthcare interventions. 2) Principles of inductive and deductive reasoning were applied to theorise the concept of acceptability and develop a theoretical framework. Steps included (1) defining acceptability; (2) describing its properties and scope and (3) identifying component constructs and empirical indicators. From the 43 reviews included in the overview, none explicitly theorised or defined acceptability. Measures used to assess acceptability focused on behaviour (e.g. dropout rates) (23 reviews), affect (i.e. feelings) (5 reviews), cognition (i.e. perceptions) (7 reviews) or a combination of these (8 reviews). From the methods described above we propose a definition: Acceptability is a multi-faceted construct that reflects the extent to which people delivering or receiving a healthcare intervention consider it to be appropriate, based on anticipated or experienced cognitive and emotional responses to the intervention. The theoretical framework of acceptability (TFA) consists of seven component constructs: affective attitude, burden, perceived effectiveness, ethicality, intervention coherence, opportunity costs, and self-efficacy. Despite frequent claims that healthcare interventions have assessed acceptability, it is evident that acceptability research could be more robust. The proposed definition of acceptability and the TFA can inform assessment tools and evaluations of the acceptability of new or existing interventions.

Santschi V., Chiolero A., Colosimo A.L., Platt R.W., Taffé P., Burnier M., Burnand B., Paradis G.

Background Control of blood pressure ( BP ) remains a major challenge in primary care. Innovative interventions to improve BP control are therefore needed. By updating and combining data from 2 previous systematic reviews, we assess the effect of pharmacist interventions on BP and identify potential determinants of heterogeneity. Methods and Results Randomized controlled trials ( RCT s) assessing the effect of pharmacist interventions on BP among outpatients with or without diabetes were identified from MEDLINE , EMBASE , CINAHL , and CENTRAL databases. Weighted mean differences in BP were estimated using random effect models. Prediction intervals ( PI ) were computed to better express uncertainties in the effect estimates. Thirty‐nine RCT s were included with 14 224 patients. Pharmacist interventions mainly included patient education, feedback to physician, and medication management. Compared with usual care, pharmacist interventions showed greater reduction in systolic BP (−7.6 mm Hg, 95% CI : −9.0 to −6.3; I 2 = 67%) and diastolic BP (−3.9 mm Hg, 95% CI : −5.1 to −2.8; I 2 = 83%). The 95% PI ranged from −13.9 to −1.4 mm Hg for systolic BP and from −9.9 to +2.0 mm Hg for diastolic BP . The effect tended to be larger if the intervention was led by the pharmacist and was done at least monthly. Conclusions Pharmacist interventions – alone or in collaboration with other healthcare professionals – improved BP management. Nevertheless, pharmacist interventions had differential effects on BP , from very large to modest or no effect; and determinants of heterogeneity could not be identified. Determining the most efficient, cost‐effective, and least time‐consuming intervention should be addressed with further research.