Blood Pressure Checks for Diagnosing Hypertension: Health Professionals' Knowledge, Beliefs, and Practices
==========================================================================================================

* Beverly B. Green
* Melissa L. Anderson
* Kelly Ehrlich
* Yoshio N. Hall
* Laurel D. Hansell
* Clarissa Hsu
* Dwayne Joseph
* Karen L. Margolis
* Jennifer B. McClure
* Sean A. Munson
* Mathew J. Thompson

## Abstract

*Introduction:* The US Preventive Services Task Force recommends out-of-office blood pressure (BP) measurement before making a new hypertension diagnosis and initiating treatment, using 24-hour ambulatory (ABPM) or home BP monitoring. However, this approach is not common.

*Methods:* e-mail-linked surveys were sent to primary care team members (n = 421) from 10 clinics. The sample included medical assistants, licensed practical nurses, registered nurses, and advanced practice registered nurses (LPN/RN/APRNs), physician assistants (PAs), and physicians. Those licensed to diagnosis hypertension (physician/PA/APRNs) received additional questions. Data were collected from November 2017 to July 2019.

*Results:* 2-thirds of invitees responded (163 MA/LPN/RNs, 86 physicians, and 33 PA/APRNs). When making a new hypertension diagnosis, most respondents believed that BP measured manually with a stethoscope (78.6%) or ABPM (84.2%) were very or highly accurate. In contrast, most did not believe that automated clinic BPs, home BP, or kiosk BP measurements were very or highly accurate. Almost all reported always or almost always relying on clinic BP measurements in making a diagnosis (95.7%), but most physician/PA/APRNs (60.5%) would prefer ABPM if it was readily available. Very few physician/PA/APRNs used the guideline-concordant diagnostic threshold (135/85 mmHg) with home monitoring (14.0%) or ABPM (8.4%), with 140/90 mmHg the most commonly reported threshold for home (59.4%) and ABPM (49.6%).

*Discussion:* Our study found health care professional knowledge, beliefs, and practices gaps in diagnosing hypertension. These gaps could lead to clinical care that is not aligned with guidelines.

*Conclusion:* System changes and interventions to increase use of evidence-based practices could improve hypertension diagnosis and outcomes.

*   Advanced Practice Nursing
*   Blood Pressure
*   Clinical Competence
*   Evidence-Based Practice
*   Hypertension
*   Licensed Practical Nurses
*   Physician Assistants
*   Physicians
*   Primary Health Care
*   Surveys and Questionnaires

## Background

The US Preventive Services Task Force (USPSTF) strongly1,2 recommends screening all adults aged 18 years or older for hypertension. For patients with high screening blood pressure (BP) in clinic, USPSTF and American College of Cardiology and American Heart Association (ACC/AHA)3 hypertension guidelines recommend follow-up BP testing outside of clinics, preferably 24-hour ambulatory BP monitoring (ABPM) or home BP monitoring (HBPM), in part to avoid overdiagnosis of hypertension and unnecessary treatment. Currently, ABPM is infrequently used in the United States, partly from lack of availability, low reimbursement, and perceptions about lower patient preference.4⇓–6 Clinicians may use HBPM, but do not always follow recommended guidelines.7⇓–9 BP kiosks, such as those found in pharmacies, provide another option for obtaining out-of-office BPs.

Blood Pressure Checks for Diagnosing Hypertension (BP-CHECK) was a randomized diagnostic study of 510 patients aged 18 to 85 without a hypertension diagnosis and taking no antihypertensive medications who had a high BP recorded in the electronic health record (EHR) and at a screening visit. Participants were randomized to either (1) Clinic, (2) Home, or (3) Kiosk BP monitoring regimens with all participants then completing ABPM.10 The primary outcomes were the accuracy and acceptability of each of the 3 diagnostic methods compared with ABPM. A secondary aim of the study was to understand health care professionals' was to understand health professional barriers and facilitators to best-practices for diagnosing hypertension in primary care. We report here results from a web-based survey sent to primary care team members at BP-CHECK participating clinics. We describe health professionals' knowledge, beliefs, and practices of using clinic BP, HBPM, kiosk BPs, and ABPM for making a new diagnosis of hypertension, comparing responses by different clinical roles (eg, physicians vs medical assistants [MAs]).

## Methods

Activities were reviewed and approved by the Kaiser Permanente Washington (KPWA) Human Subjects Review Committee. Data were collected from November 2017 to July 2019 as part of the BP-CHECK study. Study design and methods are published and include a description of the health care professional survey aims.10

### Setting, Recruitment, and Participants

The setting was KPWA, an integrated health system that provides health insurance and care in Washington state, specifically 10 of its primary care medical centers that were participating in the BP-CHECK study. Clinic participation activities included learning about the BP-CHECK study at a meeting before clinic patients were recruited, with primary care team members being invited to participate in a web-based survey. Primary care team members included MAs, licensed practical nurses, and registered nurses (collectively referred to as MA/LPN/RNs) and physicians, physician assistants, and advanced practice registered nurses (referred to as physician/PA/APRNs).

### Survey Administration

Using staffing lists generated by clinic managers, potential participants were sent a hard copy advance letter followed by an e-mail invitation with an embedded link to the secure survey hosted on a research institute server. They were informed that the survey was voluntary, would not affect their employment or benefits, and no individual-level responses or data would be shared with colleagues, organizational managers or leaders. They were also informed that participants who completed the survey would be entered into a lottery with a 1 in 20 chance of receiving a $100 Amazon gift card. Nonresponders to the initial e-mail were sent up to 2 follow-up e-mails each with the survey link embedded, and if they still did not respond, they were sent a final hard copy letter with a article survey and postage-paid return envelope. The surveys were fielded in a rolling fashion by clinic with incentive winners drawn and notified as the survey closed at each site. Late hard copy responses were accepted until the survey closed at the final site and the data set was closed.

### Questionnaires

Web surveys were derived from prior published studies,11,12 and communications with 1 of the authors (Fletcher). Physician/PA/APRNs received the same short survey as the MA/LPN/RNs, with health care professionals licensed to diagnosis hypertension (physician/PA/APRNs) receiving 5 additional questions specific to HBPM and ABPM (items 6, 21 to 24, **Questionnaires, Online Appendix**).

All respondents were asked questions about their beliefs about different BP monitoring methods for making a new hypertension diagnosis, including: in clinic (manual and automated measurement); HBPM (upper arm and wrist); kiosk-based (such as in the clinic or pharmacy); and ABPM testing. Five-point Likert scales were used to assess respondents' perceptions of diagnostic accuracy (“not at all” to “highly” accurate); how much they relied on the measurement method for diagnosis (“never” to “always”); and how easy it was for patients to complete (“not at all easy” to “very easy”). For HBPM, all respondents were asked if patients were (“never” to “always”): trained to use it and interpret results and provided a measurement schedule, and whether home monitors were checked for accuracy. All respondents were asked what BP threshold (mmHg) they used for making a diagnosis in clinic and home, with physician/PA/APRNs additionally asked about ABPM diagnostic thresholds.

Physician/PA/APRNs were asked which BP monitoring method they preferred to use now for making a new diagnosis (choose 1), and if there were no barriers to access or patient use, which they would prefer to use in the future (choose 1). They were also asked how often they had patients check home BPs and the ABPM threshold they used to make a new hypertension diagnosis. Respondents were also given an opportunity to add comments: “Is there anything we haven't asked about BP monitoring that you would like us to know or consider?” in a free text field.

### Analysis

Descriptive analyses were used to summarize survey responses. Responses were reported overall and stratified by subgroup based on health care delivery role within the primary care team. Responses from MA/LPN/RNs were reported separately from responses by physician/PA/APRNs, because only the latter health professionals are licensed to order tests (eg, ABPM) and diagnose and treat hypertension.

## Results

Participating medical center clinical staff received a web-based survey after enrollment began in their clinic, with 70.0% (163/233) of MA/LPN/RNs and 63.3% (119/188) of physician/PA/APRNs returning questionnaires. Most of the MA/LPN/RNs were MAs (61.1%) of most the physician/PA/APRNs were physicians (72.3%), (Table 1). The majority of respondents were female and younger than age 60. Most health professionals had heard of ABPM, particularly physician/PA/APRNs (81.5%), but almost 70% had not ordered 1 in the prior year (Table 2). The majority of physician/PA/APRNs (60.5%) reported ABPM as their top choice for making a new diagnosis of hypertension if there were no barriers to access, getting BP data, or patient acceptability.

View this table:
[Table 1.](http://www.jabfm.org/content/35/2/310/T1)

Table 1. 
Health Professional Characteristics

View this table:
[Table 2.](http://www.jabfm.org/content/35/2/310/T2)

Table 2. 
Use and Preferences for Ambulatory BP Monitoring and BP Measurement for Making a New Diagnosis of Hypertension

Most respondents, especially MA/LPN/RNs (88.9%), rated clinic BPs taken manually with an aneroid BP monitor and stethoscope as very or highly accurate. Only a minority of providers rated automated clinic BP, home BP, or kiosk BP as very or highly accurate, with little difference between the 2 health professional groups (Figure 1), and most respondents rating measurements taken at home with a wrist BP monitor as not very or not at all accurate. Both groups, especially physician/PA/APRNs (93.2%) rated ABPM as very or highly accurate.

![Figure 1.](http://www.jabfm.org/https://www.jabfm.org/content/jabfp/35/2/310/F1.medium.gif)

[Figure 1.](http://www.jabfm.org/content/35/2/310/F1)

Figure 1. 
Under optimal circumstances (such as no barriers to access, adherence) how accurate do believe the following screening procedures are in making a new diagnosis of hypertensions?* Abbreviations: BP, blood pressure.

Nearly all respondents (>95%), reported that they relied on BPs taken in clinic when making a new diagnosis of hypertension (Figure 2). However, almost half reported also relying on home BP (categories were not mutually exclusive). Only 1-third of physician/PA/APRNs (35.1%) reported relying on ABPM for making a new hypertension diagnosis. Both MA/LPN/RN (65.2%) and physician/PA/APRN (67.2%) groups rated home BP as easy or very easy for patients to do to confirm a new diagnosis of hypertension, but less than half thought clinic BP, kiosk, or ABPM would be easy or very easy for patients.

![Figure 2.](http://www.jabfm.org/https://www.jabfm.org/content/jabfp/35/2/310/F2.medium.gif)

[Figure 2.](http://www.jabfm.org/content/35/2/310/F2)

Figure 2. 
When making a new diagnosis of hypertension how often do you (or the providers you work with) rely on BP measurements form each of the following types of monitors?* Abbreviations: BP, blood pressure.

![Figure 3.](http://www.jabfm.org/https://www.jabfm.org/content/jabfp/35/2/310/F3.medium.gif)

[Figure 3.](http://www.jabfm.org/content/35/2/310/F3)

Figure 3. 
How Easy Would it Be for Patients to Complete the Following BP Measurement Methods for Confirming a New Diagnosis of Hypertension?* Abbreviations: BP, blood pressure.

When making a new diagnosis of hypertension, about half of the respondents reported that home BP monitors were checked for accuracy (always or almost always: MA/LPN/RNs 53.3%; physician/PA/APRNs 53.6%), and most said they always or almost always provided patients with advice on how often to measure their BP (MA/LPN/RNs 85.6%; physician/PA/APRNs 87.4%) and how to interpret the results (MA/LPN/RNs 71.1%; physician/PA/APRNs 82.0%). Physician/PA/APRNs were asked to report the number of days of home monitoring recommended when making a new hypertension diagnosis, with no recommended schedule the most common response (37.3%), followed by 14 days (19.1%), and 7 days (10.9%). The majority answered that they recommended checking BP once a day (55.9%) regardless of the number of days. Physician/PA/APRNs were asked how patients shared home BP measurements, with almost all reporting sharing by bringing in a written diary (91.5%) or recording by the patient in secure e-mail (92.4%), with some noting reviewing BP data saved on home BP monitors (45.8%).

Almost all respondents reported using a threshold of 140/90 mmHg for making a new diagnosis of hypertension, regardless of the screening method used, but a few reported 130/80 mmHg (Figure 4). Only physician/PA/APRNs were asked about ABPM thresholds, with 140/90 mmHg as the most common response, although 28 of 191 (23.5%) respondents did not answer the question. Physician/PA/APRNs were asked to report the top 3 sources that influenced their clinical decisions when diagnosing hypertension. Most (89.8%) reported that organizational guidelines were used, with the next most common response (69.5%) as national screening guidelines (eg, USPSTF, Eighth Joint National Committee). Health professionals were less likely to report being influenced by colleagues (22.9%), specialists (15.2%), systematic reviews (11.9%), patient requests (6.8%), or individual trials (0.8%).

![Figure 4.](http://www.jabfm.org/https://www.jabfm.org/content/jabfp/35/2/310/F4.medium.gif)

[Figure 4.](http://www.jabfm.org/content/35/2/310/F4)

Figure 4. 
Provider Reported Target BP Thresholds Clinic, Home, And 24-Hour Ambulatory BP Measurements Used For Making A Diagnosis Of Hypertension.* Abbreviations: BP, blood pressure; MA, medical assistant; LPN, licensed practical nurse; RN, registered nurse; PA, physician assistant; APRN, advanced practice registered nurse.

In subgroup analyses (Online Appendix Tables 1-4) PA/APRNs reported being younger than physicians and more frequently had not heard of ABPM (27.3% vs 9.3%) or ordered ABPM in the prior year (91.3% vs 61.5%). PA/APRNs also more frequently reported preferring clinic BP over other methods for diagnosing hypertension than physicians (53.3% vs 20.2%).

Some respondents (MA/LPN/RNs 16.6%, physician/PA/APRNs 12.6%) responded to the free text question: Is there anything we haven't asked about BP monitoring that you would like us to know or consider? MA/LPN/RNs reported concerns including: not trusting the automated monitor used in clinic, that automated measurements were higher than manual measurements, or they had issues related to losing data when batteries ran out, finding time to preplace them during a busy day. They also reported concerns about home BP monitor costs, how to address BPs that were high in clinic but normal at home, and making sure patients were properly trained. Physician/PA/APRNs reported having concerns about patients not having adequate rest or proper positioning when self-monitoring, costs of home BP to patients, difficulties entering home BP values into the EHR, not being able to access ABPM (long wait times for appointments, patients having to travel to far away clinics), and perceived intrusiveness of ABPM testing).

## Discussion

Our study found gaps between knowledge, beliefs, and practices of health care professionals in diagnosing hypertension, compared with guideline recommendations. While many studies have evaluated these features of health professionals related to BP measurement and treatment, few have focused on hypertension diagnosis. Todkar et al. conducted a systematic review of studies that used surveys to assess health professionals' knowledge, perceptions, and practice regarding BP measurement.13 Of 72 studies identified, 40 addressed clinic BP measurement, 25 HBPM, and 14 ABPM, with no studies that addressed using BP kiosks for BP monitoring or hypertension diagnosis. Similar to our study, Todkar et al. found that in general, health professionals' knowledge and practices about BP measurement and monitoring were suboptimal. However, most studies were from countries other than the US and few focused on hypertension diagnosis. Thus, our study provides new information on hypertension diagnosis specific to primary care practice in the US.

Health professionals in our study reported trusting and relying mainly on clinic BP measurements for making hypertension diagnostic decisions, despite USPSTF and ACC/AHA guideline recommendations that out-of-office BP measurements be taken before making and initiating treatment for a new diagnosis of hypertension.1⇓–3 The reason for the USPSTF recommendation is to avoid overdiagnosis of hypertension and unnecessary treatment by identifying white coat hypertension, in which BP is high in clinic but normal outside of clinic,14 and also to identify masked hypertension, in which BP is normal in clinic and high outside of clinic. Health professionals in our study also perceived that BPs taken manually with aneroid manometers were more accurate than automated BP measurements despite numerous studies that have demonstrated that clinic BP measurements, particularly when taken manually, are prone to errors because of difficulties hearing Korotoff sounds, cuff deflation that is too rapid, and end-number rounding.15⇓–17 To reduce these errors, guidelines and advocacy groups recommend using validated automated BP monitors.7,18,19

Health professionals in our study also perceived HBPM as easy for patients to do, but still thought it was less accurate and relied on it less than clinic BPs when making a new hypertension diagnosis. Physician/PA/APRNs ranked it as their third choice for making a new diagnosis, after ABPM and clinic BP. Logan et al., in a survey of 765 Canadian primary care physicians, reported similar results, with 52% preferring ABPM, 26% clinic, and only 12% HBPM.20 Fletcher et al., in a survey of 300 United Kingdom general practitioners, found that they were more likely to recommend HBPM for ongoing hypertension management (84%), than diagnosis (58%).11,21 Similar to our study, Fletcher found that physicians lacked knowledge about HBPM diagnostic thresholds recommended by US and UK guidelines (and BP measurement schedules (optimally 3 to 7 days with duplicate BPs morning and night),22 and that BPs should be averaged. Kronish conducted a series of focus groups to understand physicians' barriers to using HBPM to diagnose hypertension. Physicians were concerned about patients' ability to measure BP correctly, costs of home monitors, and home BP data not going into the EHR.6 Physician/PA/APRNs in our study reported similar concerns and that barriers could be overcome by training patients, loaning them home monitors (or providing them as part of insurance benefits), and having better methods for remotely capturing home BP in the EHR via telemonitoring, texting, or telephone communications.

While ABPM was the first choice of physician/PA/APRNs for making a new diagnosis of hypertension, several had not heard of this test, and most had not ordered ABPM in the prior year. These findings of lack of availability and/or use of ABPM are mirrored in other studies from the US. Carter et al., in a 2016 survey of 143 community primary care providers in Oregon, found that over half had never ordered ABPM,4 and a 2017 survey of 123 US-based primary clinics found that only 25% had access to ABPM.23 In contrast, Carrera et al. reported high use and provider preference for using ABPM for hypertension diagnosis in the Netherlands, and less trust in and use of home BP monitoring.24 In Kronish's focus group study, physicians ranked cost as an important ABPM barrier, including costs of the equipment, low reimbursement, and concerns about patient out-of-pocket costs.6 Similar to HBPM, physician/PA/APRNs in our study lacked knowledge of guideline-recommended ABPM diagnostic BP thresholds (ABPM daytime average ≥135 mmHg systolic or ≥85 mmHg diastolic). Daflo-Pibernat et al., in a study conducted in Spain,25 found that in contrast to our study, a majority of health professionals (72%) were able to correctly identify ABPM diagnostic thresholds, with this increasing to 96.6% after a 2-hour training workshop. ABPM is widely used in Spain. Increased access to ABPM and HBPM plus training in the US could decrease gaps in clinicians knowledge of guideline-recommended hypertension diagnostic thresholds.

Health professionals' confusion about HBPM and ABPM diagnostic BP thresholds in our study could be due to recent changes in US hypertension guidelines. Before 2013, clinic BP thresholds for diagnosing hypertension and initiating treatment were ≥140 mmHg systolic or ≥90 mmHg diastolic for all adult patients.26 From 2013 to 2017, the guidelines changed, incorporating a threshold of ≥150 mmHg systolic for adults aged 60 and over.27 In 2017, the guideline diagnostic thresholds changed again to ≥130 mmHg systolic or ≥80 mmHg diastolic for stage 1 hypertension and ≥140 mmHg systolic or ≥90 mmHg diastolic for stage 2,3 with treatment thresholds based on risk factors for cardiovascular disease. In contrast, US quality performance measures currently define uncontrolled hypertension as ≥140 mmHg systolic or ≥90 mmHg diastolic, regardless of whether BP is measured in the clinic or at home.28 Aligning quality performance metrics with guidelines (and including the differences between clinic and out-of-office BP measurements)29 could lead to improved knowledge by health professionals of recommended clinic BP, HBPM, and ABPM diagnostic and treatment thresholds and improved clinical care.

Health professionals' knowledge, beliefs, and practices about patients self-measuring BP at kiosks in pharmacies or clinics for making a new diagnosis of hypertension have not been previously studied. We found that health professionals rarely relied on kiosk BPs for making a new diagnosis and perceived them to be less accurate than clinic, HBPM (with an upper arm monitor), and ABPM, but perceived kiosks as easier for patients to use than clinic or ABPM testing. We did not ask any knowledge questions about kiosk BP, as kiosk BP diagnostic thresholds and frequency of measurement have not been established.

Strengths of our study include a high survey response and our comparative assessments of different types of health professionals, and different methods for diagnosing hypertension. In contrast, prior studies focused on 1 or 2 BP diagnostic methods, evaluated only 1 or 2 content areas (such as knowledge and practice, but not all 3 domains), rarely analyzed both MA/LPN/RN and physician/PA/APRN responses, and were not specific to diagnostic testing.13 Our study also has several limitations. Before conducting the survey, providers were told about the study and that some of their patients would be completing ABPM testing, which may have influenced their answers. In addition, although we distributed the surveys soon after we began recruiting patients at each clinic, some providers may have completed their survey after their patients had completed ABPM and thus were more familiar with the test. Finally, our study took place before the COVID-19 pandemic, and provider knowledge, beliefs, and practices may have changed since then with more focus on out-of-office care.

## Conclusion

Our study found gaps between knowledge, beliefs, and practices of health care professionals in diagnosing hypertension, compared with guideline recommendations. System changes and interventions to increase use of evidence-based practices could improve hypertension diagnosis and outcomes.

## Acknowledgments

We acknowledge the contributions of Chris Tachibana, PhD, Kaiser Permanente Health Research Institute for her scientific editing. We acknowledge Paula Sandler for administering and tracking the survey. We thank the participating Kaiser Permanente Washington primary care medical center administrators for allowing us to administer surveys to their staff, as well as the health professionals who completed the surveys. We also acknowledge our patient and stakeholder advisory committee for their assistance in planning the study and interpreting the study results.

## Appendix: Appendix Tables 1-6 and the Physician, Physician Assistant, Advanced Practice Registered Nurse Hypertension Diagnosis Survey

#### Appendix Table of Contents

Subgroup comparisons between physicians and Physician Assistants (PA) and Advanced Practice Registered Nurses (APRN) 

1.  Appendix Table 1. Physician and PA/APRN characteristics

2.  Appendix Table 2. Physician and PA/APRN use of and preferences for ambulatory bp monitoring and bp measurement for making a new diagnosis of hypertension

3.  Appendix Table 3. Physician and PA/APRN responses to the questions: Under optimal circumstances (such as no barriers to access, adherence) how accurate do believe the following screening procedures are in making a new diagnosis of hypertensions?

4.  Appendix Table 4. Physician and PA/APRN responses to the questions: Under optimal circumstances (such as no barriers to access, adherence) how accurate do believe the following screening procedures are in making a new diagnosis of hypertensions?

5.  Appendix Table 5. Physician and PA/APRN responses to the question: How easy would it be for patients to complete the following BP measurement methods for confirming a new diagnosis of hypertension?

6.  Appendix Table 6. Physician and PA/APRN reported diagnostic bp thresholds used for making a diagnosis of hypertension using clinic, home, and daytime ambulatory BP measurements

7.  Physician/PA/APRN questionnaire. Medical Assistants, Licensed Practical Nurses, and Registered Nurses received the same questionnaire except for 5 items (items 6, 21-24)

View this table:
[Appendix Table 1.](http://www.jabfm.org/content/35/2/310/T3)

Appendix Table 1. 
Physician and PA/APRN Characteristics

View this table:
[Appendix Table 2.](http://www.jabfm.org/content/35/2/310/T4)

Appendix Table 2. 
Physician and PA/APRN Use and Preferences for Ambulatory bp Monitoring and BP Measurement for Making a New Diagnosis of Hypertension

View this table:
[Appendix Table 3.](http://www.jabfm.org/content/35/2/310/T5)

Appendix Table 3. 
Physician and PA/APRN Responses to the Question: Under Optimal Circumstances (Such as No Barriers to Access, Adherence) How Accurate Do Believe the following Screening Procedures Are in Making a New Diagnosis of Hypertensions?*

View this table:
[Appendix Table 4.](http://www.jabfm.org/content/35/2/310/T6)

Appendix Table 4. 
Physician and PA/APRN Responses to the Question: When Making a New Diagnosis of Hypertension How Often Do You (or the Providers You Work with) Rely on BP Measurements Form Each of the following Types of Monitors?*

View this table:
[Appendix Table 5.](http://www.jabfm.org/content/35/2/310/T7)

Appendix Table 5. 
Physician and PA/APRN Responses to the Question: How Easy Would It Be for Patients to Complete the following BP Measurement Methods for Confirming a New Diagnosis of Hypertension?*

View this table:
[Appendix Table 6.](http://www.jabfm.org/content/35/2/310/T8)

Appendix Table 6. 
Physician and PA/APRN Reported Diagnostic bp Thresholds Used for Making a Diagnosis of Hypertension Using Clinic, Home, and Daytime Ambulatory BP Measurements.*

![](http://www.jabfm.org/https://www.jabfm.org/content/jabfp/35/2/310/F5/graphic-5.medium.gif)

[](http://www.jabfm.org/content/35/2/310/F5/graphic-5)

![](http://www.jabfm.org/https://www.jabfm.org/content/jabfp/35/2/310/F5/graphic-6.medium.gif)

[](http://www.jabfm.org/content/35/2/310/F5/graphic-6)

![](http://www.jabfm.org/https://www.jabfm.org/content/jabfp/35/2/310/F5/graphic-7.medium.gif)

[](http://www.jabfm.org/content/35/2/310/F5/graphic-7)

![](http://www.jabfm.org/https://www.jabfm.org/content/jabfp/35/2/310/F5/graphic-8.medium.gif)

[](http://www.jabfm.org/content/35/2/310/F5/graphic-8)

![](http://www.jabfm.org/https://www.jabfm.org/content/jabfp/35/2/310/F5/graphic-9.medium.gif)

[](http://www.jabfm.org/content/35/2/310/F5/graphic-9)

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[](http://www.jabfm.org/content/35/2/310/F5/graphic-10)

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[](http://www.jabfm.org/content/35/2/310/F5/graphic-11)

## Notes

*   This article was externally peer reviewed.

*   *Funder:* Patient Centered Outcomes Research Institute CER-1511-32979

*   *Conflict of interest:* None.

*   *Funder:* The funder had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.

*   To see this article online, please go to: [http://jabfm.org/content/35/2/310.full](http://jabfm.org/content/35/2/310.full).

*   Received for publication July 26, 2021.
*   Revision received October 28, 2021.
*   Accepted for publication November 2, 2021.

## References

1.  1.US Preventive Services Task Force. Screening for hypertension in adults: US Preventive Services Task Force reaffirmation recommendation statement. JAMA 2021;325:1650–6.
    
    

2.  2.Guirguis-Blake JM, Evans CV, Webber EM, Coppola EL, Perdue LA, Weyrich MS. Screening for hypertension in adults: a systematic evidence review for the U.S. Preventive Services Task Force. JAMA 2021;325:1657–69.
    
    

3.  3.Whelton PK, Carey RM, Aronow WS, et al. ACC/AHA/AAPA/ABC/ACPM/AGS/APhA/ASH/ASPC/NMA/PCNA Guideline for prevention, detection, evaluation and management of high BP in adults. J Am Coll Cardiol 2017;S0735-1097:41519–1.
    
    

4.  4.Carter BU, Kaylor MB. The use of ambulatory blood pressure monitoring to confirm a diagnosis of high blood pressure by primary-care physicians in Oregon. Blood Press Monit 2016;21:95–102.
    
    [PubMed](http://www.jabfm.org/lookup/external-ref?access_num=26683382&link_type=MED&atom=%2Fjabfp%2F35%2F2%2F310.atom) 

5.  5.Dietrich E, Desai R, Garg M, Park H, Smith SM. Reimbursement of ambulatory blood pressure monitoring in the US commercial insurance marketplace. J Clin Hypertens (Greenwich) 2020;22:6–15.
    
    

6.  6.Kronish IM, Kent S, Moise N, et al. Barriers to conducting ambulatory and home blood pressure monitoring during hypertension screening in the United States. J Am Soc Hypertens 2017;11:573–80.
    
    [CrossRef](http://www.jabfm.org/lookup/external-ref?access_num=10.1016/j.jash.2017.06.012&link_type=DOI) 

7.  7.Muntner P, Shimbo D, Carey RM, et al. Measurement of blood pressure in humans: a scientific statement From the American Heart Association. Hypertension May 2019;73:e35–e66.
    
    [PubMed](http://www.jabfm.org/lookup/external-ref?access_num=http://www.n&link_type=MED&atom=%2Fjabfp%2F35%2F2%2F310.atom) 

8.  8.Jones NR, McCormack T, Constanti M, McManus RJ. Diagnosis and management of hypertension in adults: NICE guideline update 2019. Br J Gen Pract 2020;70:90–1.
    
    [FREE Full Text](http://www.jabfm.org/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiRlVMTCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYmpncCI7czo1OiJyZXNpZCI7czo5OiI3MC82OTEvOTAiO3M6NDoiYXRvbSI7czoyMDoiL2phYmZwLzM1LzIvMzEwLmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==) 

9.  9.Stergiou GS, Palatini P, Parati G, European Society of Hypertension Council and the European Society of Hypertension Working Group on Blood Pressure Monitoring and Cardiovascular Variabilityet al. 2021 European Society of Hypertension practice guidelines for office and out-of-office blood pressure measurement. J Hypertens 2021;39:1293–302.
    
    

10. 10.Green BB, Anderson ML, Campbell J, et al. Blood pressure checks and diagnosing hypertension (BP-CHECK): Design and methods of a randomized controlled diagnostic study comparing clinic, home, kiosk, and 24-hour ambulatory BP monitoring. Contemp Clin Trials 2019;79:1–13.
    
    

11. 11.Fletcher BR, Hinton L, Bray EP, et al. Self-monitoring blood pressure in patients with hypertension: an internet-based survey of UK GPs. Br J Gen Pract 2016;66:e831–e837.
    
    [Abstract/FREE Full Text](http://www.jabfm.org/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYmpncCI7czo1OiJyZXNpZCI7czoxMToiNjYvNjUyL2U4MzEiO3M6NDoiYXRvbSI7czoyMDoiL2phYmZwLzM1LzIvMzEwLmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==) 

12. 12.McManus R, Wood S, Bray E, et al. Self-monitoring in hypertension: a web-based survey of primary care physicians. J Hum Hypertens 2014;28:123–7.
    
    [CrossRef](http://www.jabfm.org/lookup/external-ref?access_num=10.1038/jhh.2013.54&link_type=DOI) 
    
    [PubMed](http://www.jabfm.org/lookup/external-ref?access_num=23823583&link_type=MED&atom=%2Fjabfp%2F35%2F2%2F310.atom) 

13. 13.Todkar S, Padwal R, Michaud A, Cloutier L. Knowledge, perception and practice of health professionals regarding blood pressure measurement methods: a scoping review. J Hypertens. 2021;39:391–9.
    
    

14. 14.Piper MA, Evans CV, Burda BU, Margolis KL, O'Connor E, Whitlock EP. Diagnostic and predictive accuracy of blood pressure screening methods with consideration of rescreening intervals: a systematic review for the U.S. Preventive Services Task Force. Ann Intern Med 2015;162:192–204.
    
    [CrossRef](http://www.jabfm.org/lookup/external-ref?access_num=10.7326/M14-1539&link_type=DOI) 
    
    [PubMed](http://www.jabfm.org/lookup/external-ref?access_num=25531400&link_type=MED&atom=%2Fjabfp%2F35%2F2%2F310.atom) 

15. 15.Kallioinen N, Hill A, Horswill MS, Ward HE, Watson MO. Sources of inaccuracy in the measurement of adult patients' resting blood pressure in clinical settings: a systematic review. J Hypertens. 2017;35:421–41.
    
    [CrossRef](http://www.jabfm.org/lookup/external-ref?access_num=10.1097/HJH.0000000000001197&link_type=DOI) 
    
    [PubMed](http://www.jabfm.org/lookup/external-ref?access_num=27977471&link_type=MED&atom=%2Fjabfp%2F35%2F2%2F310.atom) 

16. 16.Foti KE, Appel LJ, Matsushita K, Coresh J, Alexander GC, Selvin E. Digit preference in office blood pressure measurements, United States 2015–2019. Am J Hypertens 2021;34:521–30.
    
    

17. 17.Nelson MR, Quinn S, Bowers-Ingram L, Nelson JM, Winzenberg TM. Cluster-randomized controlled trial of oscillometric vs. manual sphygmomanometer for blood pressure management in primary care (CRAB). Am J Hypertens 2009;22:598–603.
    
    [CrossRef](http://www.jabfm.org/lookup/external-ref?access_num=10.1038/ajh.2009.55&link_type=DOI) 
    
    [PubMed](http://www.jabfm.org/lookup/external-ref?access_num=19300424&link_type=MED&atom=%2Fjabfp%2F35%2F2%2F310.atom) 

18. 18.Hypertension Canada. Diagnosis & assessment. Accessed June 1, 2020. Available at: [https://guidelines.hypertension.ca/diagnosis-assessment/](https://guidelines.hypertension.ca/diagnosis-assessment/).
    
    

19. 19.Tomson CRV, Cheung AK, Mann JFE, et al. Management of blood pressure in patients with chronic kidney disease not receiving dialysis: Synopsis of the 2021 KDIGO clinical practice guideline. Ann Intern Med 2021;174:1270–81.: Online ahead of print.
    
    

20. 20.Logan AG, Dunai A, McIsaac WJ, Irvine MJ, Tisler A. Attitudes of primary care physicians and their patients about home blood pressure monitoring in Ontario. J Hypertens 2008;26:446–52.
    
    [CrossRef](http://www.jabfm.org/lookup/external-ref?access_num=10.1097/HJH.0b013e3282f2fdd4&link_type=DOI) 
    
    [PubMed](http://www.jabfm.org/lookup/external-ref?access_num=18300854&link_type=MED&atom=%2Fjabfp%2F35%2F2%2F310.atom) 
    
    [Web of Science](http://www.jabfm.org/lookup/external-ref?access_num=000253457800012&link_type=ISI) 

21. 21.Fletcher BR, Hinton L, Hartmann-Boyce J, Roberts NW, Bobrovitz N, McManus RJ. Self-monitoring blood pressure in hypertension, patient and provider perspectives: a systematic review and thematic synthesis. Patient Educ Couns 2016;99:210–9.
    
    [CrossRef](http://www.jabfm.org/lookup/external-ref?access_num=10.1016/j.pec.2015.08.026&link_type=DOI) 
    
    [PubMed](http://www.jabfm.org/lookup/external-ref?access_num=26341941&link_type=MED&atom=%2Fjabfp%2F35%2F2%2F310.atom) 

22. 22.Hodgkinson JA, Stevens R, Grant S, et al. Schedules for self-monitoring blood pressure: a systematic review. Am J Hypertens 2019;32:350–64.
    
    

23. 23.Woolsey S, Brown B, Ralls B, Friedrichs M, Stults B. Diagnosing hypertension in primary care clinics according to current guidelines. J Am Board Fam Med 2017;30:170–7.
    
    [Abstract/FREE Full Text](http://www.jabfm.org/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NToiamFiZnAiO3M6NToicmVzaWQiO3M6ODoiMzAvMi8xNzAiO3M6NDoiYXRvbSI7czoyMDoiL2phYmZwLzM1LzIvMzEwLmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==) 

24. 24.Carrera PM, Lambooij MS. Implementation of out-of-office blood pressure monitoring in the Netherlands: from clinical guidelines to patients' adoption of innovation. Medicine 2015;94:e1813.
    
    

25. 25.Dalfo-Pibernat A, Dalfo Baque A, Pelegrina Rodriguez FJ, et al. Improving ambulatory blood pressure monitoring knowledge in nurses and doctors: impact of a training intervention. Eur J Cardiovasc Nurs 2018;17:742–50.
    
    

26. 26.Chobanian AV, Bakris GL, Black HR, et al. The seventh report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure: the JNC 7 report. JAMA 2003;289:2560–72.
    
    [CrossRef](http://www.jabfm.org/lookup/external-ref?access_num=10.1001/jama.289.19.2560&link_type=DOI) 
    
    [PubMed](http://www.jabfm.org/lookup/external-ref?access_num=12748199&link_type=MED&atom=%2Fjabfp%2F35%2F2%2F310.atom) 
    
    [Web of Science](http://www.jabfm.org/lookup/external-ref?access_num=000182976500025&link_type=ISI) 

27. 27.James PA, Oparil S, Carter BL, et al. Evidence-based guideline for the management of high blood pressure in adults: report from the panel members appointed to the Eighth Joint National Committee (JNC 8). JAMA. 2014;311:507–20.
    
    [CrossRef](http://www.jabfm.org/lookup/external-ref?access_num=10.1001/jama.2013.284427&link_type=DOI) 
    
    [PubMed](http://www.jabfm.org/lookup/external-ref?access_num=24352797&link_type=MED&atom=%2Fjabfp%2F35%2F2%2F310.atom) 
    
    [Web of Science](http://www.jabfm.org/lookup/external-ref?access_num=000330589800024&link_type=ISI) 

28. 28.National Committee for Quality Assurance. 2022 Quality Rating System measure technical specifications. Centers for Medicare & Medicaid Services; 2021. Accessed Oct 1, 2021. [https://www.cms.gov/files/document/2022-qrs-measure-tech-specs.pdf](https://www.cms.gov/files/document/2022-qrs-measure-tech-specs.pdf).
    
    

29. 29.Muntner P, Carey RM, Jamerson K, Wright JT Jr.., Whelton PK. Rationale for ambulatory and home blood pressure monitoring thresholds in the 2017 American College of Cardiology/American Heart Association guideline. Hypertension 2019;73:33–8.