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Control of blood pressure and risk attenuation: a public health intervention in rural Bangladesh, Pakistan, and Sri Lanka: feasibility trial results

Jafar, Tazeen H.a,b; Silva, Asita dec,*; Naheed, Aliyad,*; Jehan, Imtiaze,*; Liang, Fenga; Assam, Pryseley N.f; Legido-Quigley, Helenag; Finkelstein, Eric A.a,b; Ebrahim, Shahh; Wickremasinghe, Rajithai; Alam, Dewand,j; Khan, Aamir Hameedk; for the COBRA-BPS Study Group

doi: 10.1097/HJH.0000000000001014
ORIGINAL PAPERS: Therapeutic aspects

Background: High blood pressure (BP) is the leading attributable risk for cardiovascular disease globally. There is little information on effective and sustainable public health system strategies for managing hypertension in South Asian countries. We conducted a feasibility study to gather preliminary data to optimize BP-lowering strategies for a public health intervention in rural communities in Bangladesh, Pakistan, and Sri Lanka.

Methods: A mixed method feasibility study comprised a 3-month pre and postevaluation of a multicomponent intervention (MCI), including BP screening and home health education by trained government community health worker (CHW); providers trained in hypertension management, and compensation of CHW for additional services. Checklists were used to document care. Stakeholder interviews were also conducted. Individuals aged 40 years and above with high BP (systolic ≥140 mmHg or diastolic ≥90 mmHg based on two readings from 2 separate days, or receiving antihypertensive medications) were enrolled from rural communities in Bangladesh, Pakistan, and Sri Lanka. BP was measured at baseline and 3 months postintervention.

Results: A total of 412 (90%) of the 454 eligible individuals were recruited. Of those recruited, 90% received home health education session by trained CHWs, 80% were referred to trained providers, of whom 83% completed the management checklist. A follow-up rate of 95.6% was achieved. The mean SBP declined significantly by 4.5 mmHg 95% confidence interval (2.3, 6.7) mmHg (P < 0.001) in the overall pooled analysis in three countries; however, it varied among countries. BP decline was 10.5 mmHg (8.1, 13.0 mmHg) (P < 0.001) in the pooled analysis of individuals with uncontrolled hypertension at baseline, and was also significant each of the three countries. All 98 stakeholders strongly supported upscaling the proposed MCI strategies.

Conclusion: The proposed MCI is feasible for implementation and requires long-term, large-scale evaluation in the rural public health infrastructure in South Asian countries to determine sustainability of health system changes and BP control. If these long-term effects are confirmed, MCI may be a long-term strategy for tackling rising rates of cardiovascular disease in low-resourced countries.

Clintrial.gov NCT02341651

aProgram in Health Services and Systems Research, Duke-NUS Graduate Medical School, Singapore, Singapore

bDuke Global Health Institute, Durham, North Carolina, USA

cDepartment of Pharmacology, Faculty of Medicine, Clinical Trials Unit, University of Kelaniya, Kelaniya, Sri Lanka

dInternational Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh

eDepartment of Community Health Sciences, Aga Khan University, Karachi, Pakistan

fSingapore Clinical Research Institute, Singapore, Singapore

gSaw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore

hLondon School of Hygiene and Tropical Medicine, London, UK

iDepartment of Public Health, Faculty of Medicine, University of Kelaniya, Kelaniya, Sri Lanka

jFaculty of Health, York University, Toronto, Ontario, Canada

kDepartment of Medicine, Section of Cardiology, Aga Khan University, Karachi, Pakistan

*Asita de Silva, Aliya Naheed, and Imtiaz Jehan contributed equally to the writing of this article.

Correspondence to Tazeen H. Jafar, MD, MPH, Professor, Program in Health Services and Systems Research, Duke-NUS Graduate Medical School, 8 College Road, Singapore 169857, Singapore. Tel: +65 6601 2582; fax: +65 6534 8632; e-mail: tazeen.jafar@duke-nus.edu.sg

Abbreviations: ACEI, angiotensin-converting enzyme inhibitors; ARB, angiotensin receptor blockers; BP, blood pressure; CCB, calcium channel blockers; CHW, community health worker; COBRA, Control of Blood Pressure and Risk Attenuation; COBRA-BPS, Control of Blood Pressure and Risk Attenuation-Bangladesh, Pakistan, and Sri Lanka; CVD, cardiovascular disease; GP, general practitioner; HHE, home health education; ICC, intracluster correlation coefficient; MCI, multicomponent intervention; NCD, noncommunicable disease

Received 24 February, 2016

Revised 18 May, 2016

Accepted 23 May, 2016

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