High blood pressure screening in pharmacies during May Measurement Month campaigns in Switzerland

May Measurement Month (MMM) is an international screening campaign for arterial hypertension (HT) organised by the International Society of Hypertension and the World Hypertension League. It aims at raising the awareness of elevated blood pressure (BP) in the population. The goal of this analysis was to assess the results obtained in Swiss pharmacies during a 3-year campaign.

Swiss data from the MMM17 to MMM19 campaigns were extracted from the global MMM database. The analysis was conducted specifically on measures taken in pharmacies. BP and a questionnaire including demographical and clinical information were recorded for each participant. To assess BP control, ESH 2018 thresholds of <140/90 mmHg and ESH 2021 pharmacy-thresholds of <135/85 mmHg were used.

From an initial sample of 3634 Swiss participants included during this 3-year campaign, 2567 participants (73.2%women and 26.8% men, p<.001) had their BP measured in triplicates in pharmacies. The first BP measurement was associated with 2.0 ± 4.9 mmHg effect on systolic blood pressure (SBP) (p<.001) and 0.7 ± 3.7 mmHg on diastolic blood pressure (DBP) (p<.001) compared to the mean of the second and third measurements. Based on the ESH 2018 and the ESH 2021 pharmacy thresholds, prevalence of HT (mean of second and third measurements) increased from 29.5% to 38.3%, respectively. In treated participants, 58.3% (279) had an average BP < 140/90 mmHg and 40.3% (193) had an average BP < 135/85 mmHg.

HT screening campaigns in pharmacies recruits mainly women. It helps the detection of untreated hypertensive participants and uncontrolled treated participants. Our data suggest that the average BP should be calculated on the second and third measurements due to a significant first measure effect in pharmacies measurement. SummaryHigh blood pressure (BP) is a major global public health issue as the leading risk factor of global death.World-wide initiatives like May Measurement Month (MMM) aim to screen thousands of people each year to raise awareness of hypertension (HT).Switzerland participated in MMM 2017-2019 and screened more than 2500 participants in pharmacies.When adopting the recent proposed thresholds of HT diagnosis in pharmacies (ESH 2021 > 135/85 mmHg), HT prevalence in Switzerland is high (38.3%) with only 2/3 of treated hypertensive achieving the BP goals.Women are more likely to participate in such campaigns taking place in pharmacies.A first measurement effect (FME) was also present in pharmacies, highlighting that taking three BP measurements in pharmacies and discarding the first should be also considered in the pharmacy setting.Involving a routine pharmacy-based health care of patients would help to identify more hypertensive patients and uncontrolled treated patients, who may not have had access to BP measurement.