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Randomized Controlled Trial
. 2018 Mar 14;19(1):180.
doi: 10.1186/s13063-018-2559-x.

Management of hypertension and multiple risk factors to enhance cardiovascular health in Singapore: The SingHypertension cluster randomized trial

Tazeen H Jafar  1   2   3 , Ngiap Chuan Tan  4   5 , John C Allen  6 , Eric A Finkelstein  7 , Paul Goh  4 , Peter Moey  4 , Joanne Hui Min Quah  4 , Siew Wai Hwang  4 , Juliana Bahadin  4 , Anandan Gerard Thiagarajah  4 , Jason Chan  4 , Gary Kang  4 , Agnes Koong  4
Affiliations
Randomized Controlled Trial

Management of hypertension and multiple risk factors to enhance cardiovascular health in Singapore: The SingHypertension cluster randomized trial

Tazeen H Jafar et al. Trials. .

Abstract

Background: Hypertension is a serious public health problem in Singapore and is associated with significant morbidity and mortality from cardiovascular disease (CVD) with considerable implications for health-care resources. The goal of the trial is to compare a multicomponent intervention (MCI) to usual care to evaluate the effectiveness and cost-effectiveness of the MCI for lowering blood pressure (BP) among adults with uncontrolled hypertension in Singapore primary-care clinics.

Methods/design: The study is a cluster randomized trial in eight polyclinics in Singapore: four deliver a structured MCI and four deliver usual care. The components of the MCI are: (1) an algorithm-driven antihypertensive treatment for all hypertensive individuals using single-pill combination (SPC) and lipid-lowering medication for high-risk hypertensive individuals, (2) a motivational conversation for high-risk hypertensive individuals, (3) telephone-based follow-ups of all hypertensive individuals by polyclinic nurses, and (4) discounts on SPC antihypertensive medications. The trial will be conducted with 1000 individuals aged ≥ 40 years with uncontrolled hypertension (systolic BP ≥ 140 mmHg or diastolic BP ≥ 90 mmHg, based on the mean of the last two of three measurements) in eight polyclinics in Singapore. The primary outcome is change in systolic BP from baseline to follow-up at 24 months post-randomization. The incremental cost of MCI per CVD disability adjusted life years (DALY) averted and quality adjusted life years (QALY) saved will be computed.

Discussion: The demonstration of an effective and cost-effective hypertension control program that is implementable in busy polyclinics would provide compelling evidence for upscaling the program across all primary-care centers in Singapore, and possibly other regional countries with a similar health-care structure.

Trial registration: Clinicaltrials.gov, NCT02972619 . Registered on 23 November 2016.

Keywords: Blood pressure; Hypertension; Motivational counseling; Single-pill combination; Telephone follow-up; cardiovascular.

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Conflict of interest statement

Ethics approval and consent to participate

Ethical approval has been obtained from the SingHealth Ethics Review Committee for the original protocol as well as the amendments. Written informed consent will be obtained prior to participant involvement in the study.

Consent for publication

Not applicable.

Competing interests

The authors declare that they have no competing interests.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
Study flow diagram
See this image and copyright information in PMC

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