PERson-centredness in Hypertension management using Information Technology: a randomized controlled trial in primary care

Evaluation of self-monitoring of blood pressure in the PERHIT study and the impact on glomerular function

BACKGROUND

Although intensive blood pressure (BP) control has not been shown to slow the progression of chronic kidney disease (CKD), intensive BP control has been shown to reduce the risk for adverse cardiovascular outcomes in the CKD population. The aim of this post-hoc study was to study the interplay between a self-monitoring BP system and glomerular function.

METHODS

In all, 949 participants with hypertension underwent visits at baseline, after eight weeks and 12 months. Half of the participants received a BP monitor and installed a program on their mobile phone. During eight weeks, they measured daily and reported their BP values.

RESULTS

Within the intervention group, BP and systolic BP (SBP) decreased from baseline to eight weeks and 12 months (p < .001). Pulse pressure (PP) and mean arterial blood pressure (MAP) decreased from baseline to eight weeks (p = .021 and p = .004) vs 12 months (p = .035 and p = .008). Within the control group, a decrease was observed from baseline to 12 months for SBP, diastolic BP (DBP) and PP (p = .025, p = .023 and p = .036). In the intervention group, we observed an association between a decrease in SBP, DBP, PP and MAP and a decrease in eGFR (estimated glomerular filtration rate), (p < .001, p < .001, p = .013 and p < .001). In the control group, similar results were observed for PP only (p = .027). Within the intervention group, eGFR decreased (p < .001) but within the control group, the decrease was non-significant (p = .051).

CONCLUSION

We observed an association between a decrease in all BP components and eGFR decline within the normal range in the intervention group but not in the controls.

TRIAL REGISTRATION

The study was registered with ClinicalTrials.gov [NCT03554382].

Associations between daily home blood pressure measurements and self-reports of lifestyle and symptoms in primary care: the PERHIT study

OBJECTIVE

To explore in a primary care setting the associations between patients' daily self-measured blood pressure (BP) during eight weeks and concurrent self-reported values of wellbeing, lifestyle, symptoms, and medication intake. We also explore these associations for men and women separately.

DESIGN AND SETTING

The study is a secondary post-hoc analysis of the randomised controlled trial PERson-centeredness in Hypertension management using Information Technology (PERHIT). The trial was conducted in primary health care in four regions in Southern Sweden.

PATIENTS

Participants (n = 454) in the intervention group in the PERHIT-trial used an interactive web-based system for self-management of hypertension for eight consecutive weeks. Each evening, participants reported in the system their wellbeing, lifestyle, symptoms, and medication adherence as well as their self-measured BP and heart rate.

MAIN OUTCOME MEASURES

Association between self-reported BP and 10 self-report lifestyle-related variables.

RESULTS

Self-reported less stress and higher wellbeing were similarly associated with BP, with 1.0 mmHg lower systolic BP and 0.6/0.4 mmHg lower diastolic BP (p < 0.001). Adherence to medication had the greatest impact on BP levels (5.2/2.6 mmHg, p < 0.001). Restlessness and headache were also significantly associated with BP, but to a lesser extent. Physical activity was only significantly associated with BP levels for men, but not for women.

CONCLUSION

In hypertension management, it may be important to identify patients with high-stress levels and low wellbeing. The association between medication intake and BP was obvious, thus stressing the importance of medication adherence for patients with hypertension.

Effects of an interactive web-based support system via mobile phone on preference-based patient participation in patients living with hypertension - a randomized controlled trial in primary care

OBJECTIVE

To estimate the effects of an interactive web-based support system via mobile phone on preference-based patient participation in patients with hypertension treated in primary care (compared with standard hypertensive care only).

DESIGN

A parallel group, non-blinded, randomized controlled trial, conducted October 2018-February 2021. Besides standard hypertensive care, the intervention group received eight weeks of support via mobile phone to facilitate self-monitoring and self-management, tentatively providing for augmented patient engagement.

SETTING

31 primary healthcare centers in Sweden.

SUBJECTS

949 patients treated for hypertension.

MAIN OUTCOME MEASURES

The effects on preference-based patient participation, that is, the match between a patient's preferences for and experiences of patient participation in their health and healthcare. This was measured with the 4Ps (Patient Preferences for Patient Participation) tool at baseline, after 8 weeks, and at 12 months. Data were registered electronically and analyzed with multilevel ordinal regression.

RESULTS

At baseline, 43-51% had a complete match between their preferences for and experiences of patient participation. There was an indication of a positive effect by a higher match for 'managing treatment myself' at 8-weeks in the intervention group. Such preference-based participation in their health and healthcare was reversed at 12 months, and no further effects of the intervention on preference-based patient participation persisted after 12 months.

CONCLUSION

The interactive web-based support system via mobile phone had a wavering effect on preference-based patient participation. There is a prevailing need to better understand how person-centered patient participation can be facilitated in primary care.

Variability in home blood pressure and its association with renal function and pulse pressure in patients with treated hypertension in primary care

Blood pressure variability (BPV) represents a cardiovascular risk factor, regardless of mean level of blood pressure (BP). In this post-hoc analysis from the PERson-centredness in Hypertension management using Information Technology (PERHIT) study, we aimed to explore BPV in daily home measurements in hypertensive patients from primary care, to identify factors associated with high BPV and to investigate whether estimated glomerular filtration rate (eGFR) and pulse pressure, as markers of target organ damage (TOD), are associated with BPV. For eight consecutive weeks, 454 participants reported their daily BP and heart rate in their mobile phone, along with reports of lifestyle and hypertension-related factors. Systolic BP (SBP) values were used to calculate BPV with coefficient of variation (CV) as primary estimate. Background characteristics and self-reports were tested between fifths of CV in a linear regression model, adjusted for age and sex. Associations between BPV and eGFR and pulse pressure were tested with linear and logistic regression models. Higher home BPV was associated with higher age, BP, heart rate, and smoking. BPV was lower for participants with low alcohol consumption and treatment with calcium channel blockers. There was a significant association between BPV and pulse pressure (P = 0.015), and between BPV and eGFR (P = 0.049). Participants with high BPV reported more dizziness and palpitations. In conclusion, pulse pressure and eGFR were significantly associated with home BPV. Older age, high BP, heart rate, and smoking were associated with high BPV, but treatment with calcium channel blockers and low alcohol consumption was associated with low BPV. Trial registration: The study was registered with ClinicalTrials.gov [NCT03554382].

Beliefs about medications when treating hypertension in primary health care: results from "PERson-centredness in hypertension management using information Technology (PERHIT)"

PURPOSE

Hypertension is a major global health concern. Despite of efficient antihypertensive medications a low percentage of patients reach a blood pressure (BP) of <140/90. Nonadherence is a great concern in hypertension treatment and patients' beliefs about medications has been shown to have a strong impact on adherence. The objective of this study is to examine beliefs about medications and its impact on BP treatment in a group of Swedish primary healthcare patients treated for hypertension with or without an E-health platform.

MATERIALS AND METHOD

In a randomised unblinded controlled trial, 949 patients with hypertension from Swedish primary health care centres were included. The intervention group used a web-based system to support self-management of hypertension for eight weeks. Beliefs about medication questionnaire (BMQ) were administered to all patients at inclusion, 8-week follow up and 1-year follow up.

RESULTS

Data were collected from the 862 patients who completed the trial. No statistically significant difference was found in BMQ-scores between the intervention and the control group. An association between lower scores in the BMQ subsection 'General-Harm' and achieving target BP of <140/90 mmHg were noted (p = 0.021).

CONCLUSION

This study shows a significant association between beliefs about medication and BP levels, on hypertensive patients in the Swedish primary care setting, in only one out of four subsections of the BMQ. The intervention did not have a significant effect on changing patients' beliefs about medication. Further emphasis on patients' beliefs about medications could be useful in the clinical setting.

Hypertension management in primary health care: a survey in eight regions of Sweden

PURPOSE

To explore hypertension management in primary healthcare (PHC).

DESIGN

Structured interviews of randomly selected PHC centres (PHCCs) from December 2019 to January 2021.

SETTING

Seventy-six PHCCs in eight regions of Sweden.

MAIN OUTCOME MEASURES

Staffing and organization of hypertension care. Methods of measuring blood pressure (BP), laboratory tests, registration of co-morbidities and lifestyle advice at diagnosis and follow-up.

RESULTS

The management of hypertension varied among PHCCs. At diagnosis, most PHCCs (75%) used the sitting position at measurements, and only 13% routinely measured standing BP. One in three (33%) PHCCs never used home BP measurements and 25% only used manual measurements. The frequencies of laboratory analyses at diagnosis were similar in the PHCCs. At follow-up, fewer analyses were performed and the tests of lipids and microalbuminuria decreased from 95% to 45% (p < 0.001) and 61% to 43% (p = 0.001), respectively. Only one out of 76 PHCCs did not measure kidney function at routine follow-ups. Lifestyle, physical activity, food habits, smoking and alcohol use were assessed in ≥96% of patients at diagnosis. At follow-up, however, there were fewer assessments. Half of the PHCCs reported dedicated teams for hypertension, 82% of which were managed by nurses. There was a great inequality in the number of patients per tenured GP in the PHCCs (median 2500; range 1300-11300) patients.

CONCLUSIONS

The management of hypertension varies in many respects between PHCCs in Sweden. This might lead to inequity in the care of patients with hypertension.