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15.08.2018 | original article | Ausgabe 23-24/2018 Open Access

Wiener klinische Wochenschrift 23-24/2018

Lowering blood pressure in primary care in Vienna (LOW-BP-VIENNA)

A cluster-randomized trial

Zeitschrift:
Wiener klinische Wochenschrift > Ausgabe 23-24/2018
Autoren:
MD, PhD Miklos Rohla, MD Maximilian Tscharre, MD, FESC, FACC, FAHA Kurt Huber, MD, PhD, FESC Thomas W. Weiss
Wichtige Hinweise

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1007/​s00508-018-1374-4) contains supplementary material, which is available to authorized users.

Summary

Background

In Austria only 41% of patients with treated hypertension (HTN) have their blood pressure (BP) controlled. This study investigated a strategy to improve BP control in primary care.

Methods

General practitioners (GPs) were randomized to interventional care vs. standard care and included patients with uncontrolled office BP > 140/90 mm Hg. In interventional care, antihypertensive therapy was up-titrated using a single pill combination (olmesartan, amlodipine and/or hydrochlorothiazde) in 4‑week intervals. In standard care, physicians were encouraged to treat according to the 2013 European Society of Cardiology guidelines for the management of arterial hypertension. The primary endpoint was the proportion of patients with controlled office BP < 140/90 mm Hg at 6 months. The main secondary endpoint was the improvement in 24 h ambulatory BP (ABPM, Clinicaltrials.gov NCT02377661).

Results

Between 2015–2017, 20 GPs contributed to patient recruitment. The trial was discontinued due to slow recruitment after inclusion of 139 eligible patients, 54 of whom were included in the interventional group. A significantly larger proportion of patients in interventional vs. standard care achieved the office BP target (67% ± 26% vs. 39% ± 29%, respectively, mean difference −27.9%, 95% confidence interval CI −54.0%; −1.7%, p = 0.038). The proportion of patients with controlled 24 h ABPM (<130/80 mm Hg) was similar between groups (49% ± 33% vs. 40% ± 34%, respectively, mean difference −8.8%, 95% CI −40.7%; 23.1%, p = 0.57). At baseline, pretreated patients received an average of 1.5 ± 0.8 vs. 1.7 ± 0.9 antihypertensive prescriptions. At 6 months, the respective BP reductions were achieved with 1.2 ± 0.5 prescriptions in interventional vs. 2.0 ± 1.0 in standard care (p < 0.01).

Conclusion

In both groups statistically and clinically significant BP reductions were observed after 6 months. In the interventional care group, a larger proportion of patients achieved the office BP target compared to standard care. The 24 h ambulatory blood pressure levels were controlled in 44% of patients at 6 months, without significant differences between groups. The respective BP reductions were achieved with a significantly lower medication burden in interventional care.
Zusatzmaterial
Additional data for primary and secondary outcomes, and the incidence of adverse events
508_2018_1374_MOESM1_ESM.doc
Literatur
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