Faculty Bibliography

BACKGROUND:: Research in industrialized countries has demonstrated that a key factor limiting the control of hypertension is poor patient adherence and that the most successful interventions for long-term adherence employ multiple strategies. Very little data exist on this question in low-income countries, wherein medication-taking behavior may be less well developed. METHOD:: We conducted a treatment adherence trial of 544 patients [mean age approximately 63 years, mean blood pressure (BP) approximately 168/92 mmHg] with previously untreated hypertension in urban and rural Nigeria. Eligible participants were randomized to one of two arms: clinic management only, or clinic management and home visits. Both interventions included three elements: a community based, nurse-led treatment program with physician backup; facilitation of clinic visits and health education; and the use of diuretics and a beta blocker as needed. After initial diagnosis, the management protocol was implemented by a nurse with physician backup. Participants were evaluated monthly for 6 months. RESULTS:: Medication adherence was assessed with pill count and urine testing. Drop-out rates, by treatment group, ranged from 12 to 28%. Among participants who completed the 6-month trial, overall adherence was high ( approximately 77% of participants took >98% of prescribed pills). Adherence did not differ by treatment arm, but was better at the rural than the urban site and among those with higher baseline BP. Hypertension control (BP <140/90 mmHg) was achieved in approximately 66% of participants at 6 months. CONCLUSION:: This community-based intervention confirms relatively modest default rates compared with industrialized societies, and suggests that medication adherence can be high in developing world settings in clinic attenders.

BACKGROUND:Poor adherence explains poor blood pressure (BP) control; however African Americans suffer worse hypertension-related outcomes. METHODS:This randomized controlled trial evaluated whether a patient education intervention enhanced with positive-affect induction and self-affirmation (PA) was more effective than patient education (PE) alone in improving medication adherence and BP reduction among 256 hypertensive African Americans followed up in 2 primary care practices. Patients in both groups received a culturally tailored hypertension self-management workbook, a behavioral contract, and bimonthly telephone calls designed to help them overcome barriers to medication adherence. Also, patients in the PA group received small gifts and bimonthly telephone calls to help them incorporate positive thoughts into their daily routine and foster self-affirmation. The main outcome measures were medication adherence (assessed with electronic pill monitors) and within-patient change in BP from baseline to 12 months. RESULTS:The baseline characteristics were similar in both groups: the mean BP was 137/82 mm Hg; 36% of the patients had diabetes; 11% had stroke; and 3% had chronic kidney disease. Based on the intention-to-treat principle, medication adherence at 12 months was higher in the PA group than in the PE group (42% vs 36%, respectively; P =.049). The within-group reduction in systolic BP (2.14 mm Hg vs 2.18 mm Hg; P = .98) and diastolic BP (-1.59 mm Hg vs -0.78 mm Hg; P = .45) for the PA group and PE group, respectively, was not significant. CONCLUSIONS:A PE intervention enhanced with PA led to significantly higher medication adherence compared with PE alone in hypertensive African Americans. Future studies should assess the cost-effectiveness of integrating such interventions into primary care. Trial Registration clinicaltrials.gov Identifier: NCT00227175.

BACKGROUND:Hypertension is becoming a common health problem worldwide with increasing life expectancy and increasing prevalence of risk factors. Epidemiological data on hypertension in Ghana is necessary to guide policy and develop effective interventions. METHODS:A review of population-based studies on hypertension in Ghana was conducted by a search of the PUBMED database, supplemented by a manual search of bibliographies of the identified articles and through the Ghana Medical Journal. A single reviewer extracted data using standard data collection forms. RESULTS:Eleven studies published on hypertension with surveys conducted between 1973 and 2009 were identified. The prevalence of hypertension was higher in urban than rural areas in studies that covered both types of area and increased with increasing age (prevalence ranging from 19.3% in rural to 54.6% in urban areas). Factors associated with high blood pressure included increasing body mass index, increased salt consumption, family history of hypertension and excessive alcohol intake. The levels of hypertension detection, treatment and control were generally low (control rates ranged from 1.7% to 12.7%). CONCLUSION/CONCLUSIONS:An increased burden of hypertension should be expected in Ghana as life expectancy increases and with rapid urbanisation. Without adequate detection and control, this will translate into a higher incidence of stroke and other adverse health outcomes for which hypertension is an established risk factor. Prevention and control of hypertension in Ghana is thus imperative and any delays in instituting preventive measures would most likely pose a greater challenge on the already overburdened health system.

BACKGROUND:Ghana's health system is ill-equipped to tackle the country's double burden of infectious and chronic diseases. The current focus is on empowering lay communities to adopt healthy practices to prevent chronic diseases. Understanding how individuals make sense of health, illness and chronic illnesses is an important first step to developing practical interventions. METHODS:Six focus group discussions with lay people (N= 51) in Accra, Nkoranza and Kintampo to explore: (1) knowledge of prevalent chronic diseases in Ghana; (2) chronic disease causal theories; and (3) chronic disease treatment. RESULTS:Nineteen conditions were listed cumulatively. Diabetes and hypertension were listed by all groups. Rural groups included HIV/AIDS on their list as well as diseases with alleged spiritual roots, in particular epilepsy and sickle cell disease. Multiple causal theories were presented for diabetes and hypertension; cancers were attributed to toxic foods; asthma attributed to environmental pollution. Biomedical care was preferred by the majority. Lay representations were drawn from multiple sources: medical professionals and chronically ill individuals were the most legitimate knowledge sources. CONCLUSION/CONCLUSIONS:This study provides insights on how lay representations of common chronic diseases and their major risk factors provide public health specialists with the conceptual tools to develop primary prevention strategies. The first challenge will be to train health experts to provide accurate information in practical language that lay people can understand and apply to their daily lives. A second challenge will be to develop sustainable behaviour-change interventions. Best practices from other African countries can inform interventions in Ghana.

OBJECTIVE: To determine the morbidity and mortality in adult in-patients with stroke admitted to the Komfo Anokye Teaching Hospital (KATH). METHODS: A retrospective study of in-patients with stroke admitted to the KATH, from January 2006 to december 2007 was undertaken. Data from admission and discharge registers were analysed to determine stroke morbidity and mortality. RESULTS: Stroke constituted 9.1% of total medical adult admissions and 13.2% of all medical adult deaths within the period under review. The mean age of stroke patients was 63.7 (95% ci=62.8, 64.57) years. Males were younger than females. The overall male to female ratio was 1:0.96, and the age-adjusted risk of death from stroke was slightly lower for females than males (relative risk= 0.88; 95% ci=0.79, 1.02, p=0.08). The stroke case fatality rate was 5.7% at 24 hours, 32.7% at 7 days, and 43.2% at 28 days. CONCLUSION: Stroke constitutes a significant cause of morbidity and mortality in Ghana. Major efforts are needed in the prevention and treatment of stroke. Population-based health education programs and appropriate public health policy need to be developed. This will require a multidisciplinary approach of key players with a strong political commitment. There is also a clear need for further studies on this topic including, for example, an assessment of care and quality of life after discharge from hospital. The outcomes of these studies will provide important information for the prevention efforts.

BACKGROUND: Heart failure is among the most common reasons for hospitalizations in the United States. Recent data from Medicare suggest that the number of hospitalizations with a primary diagnosis of heart failure has declined over the past decade. However, heart failure may increase hospitalization rates for related comorbidities and individuals with heart failure are commonly admitted for other reasons. Using a nationally representative sample of hospital admissions, we studied trends in hospitalizations with both a primary and a secondary diagnosis of heart failure. METHODS: We evaluated trends in heart failure hospitalizations from 2001 to 2009 using the Nationwide Inpatient Sample (NIS), the largest all-payer inpatient database in the United States. We included hospitalizations with an International Classification of Diseases, Ninth Revision discharge diagnosis codes of 402.X1, 404.X1, 404.X3, 428.XX in any position; these codes in the primary position are used by The Centers for Medicare & Medicaid Services for reporting heart failure quality measures. Admissions were categorized as either primary heart failure hospitalization, if heart failure was the primary discharge code, or heart failure associated hospitalization, if heart failure was listed as a secondary diagnosis. National estimates of heart failure hospitalizations were calculated using the sampling weights and stratified sample design of the NIS. Yearly hospitalization rateswere determined by dividing the number of hospitalizations by the United States population in a given year. Population estimates were obtained from the United States Census Bureau. RESULTS: The total number of heart failure hospitalizations in the United States increased from 3,900,305 in 2001 to 4,398,376 in 2006 and then decreased to 4,253,937 in 2009. The number of primary heart failure admissions decreased from 1,139,607 in 2001 to 1,087,913 in 2009, while the number of heart failure associated hospitalizations increased from 2,760,698 to 3,166,024 over !

This paper examines the challenges and opportunities in establishing and sustaining north-south research partnerships in Africa through a case study of the UK-Africa Academic Partnership on Chronic Disease. Established in 2006 with seed funding from the British Academy, the partnership aimed to bring together multidisciplinary chronic disease researchers based in the UK and Africa to collaborate on research, inform policymaking, train and support postgraduates and create a platform for research dissemination. We review the partnership's achievements and challenges, applying established criteria for developing successful partnerships. During the funded period we achieved major success in creating a platform for research dissemination through international meetings and publications. Other goals, such as engaging in collaborative research and training postgraduates, were not as successfully realised. Enabling factors included trust and respect between core working group members, a shared commitment to achieving partnership goals, and the collective ability to develop creative strategies to overcome funding challenges. Barriers included limited funding, administrative support, and framework for monitoring and evaluating some goals. Chronic disease research partnerships in low-income regions operate within health research, practice, funding and policy environments that prioritise infectious diseases and other pressing public health and developmental challenges. Their long-term sustainability will therefore depend on integrated funding systems that provide a crucial capacity building bridge. Beyond the specific challenges of chronic disease research, we identify social capital, measurable goals, administrative support, creativity and innovation and funding as five key ingredients that are essential for sustaining research partnerships.

OBJECTIVE: To elicit the explanatory models (EM) of hypertension among patients in a hospital-based primary care practice in Nigeria. Design. Semi-structured in-depth individual interviews and focus groups were conducted with 62 hypertensive patients. Interviews and focus groups were audiotaped and transcribed verbatim. Data analysis was guided by phenomenology and content analysis using qualitative research software ATLAS.ti 5.0. RESULTS: Patients expressed four categories of EM of hypertension: (1) perceptions of hypertension, (2) consequences, (3) effect on daily life, and (4) perception of treatment. Focus group discussions and individual interviews yielded a wide range of insights into the social and cultural factors influencing patients' beliefs and health behavior. Participants were aware of the risks of hypertension. There was disagreement between participants' own understanding of the serious nature of hypertension, the need for long-term treatment, and the desire to take long-term medication. Participants acknowledged the use of traditional medicine (e.g., teas and herbs) and healers. Different themes emerged for men versus women such that women often focused on family issues while men tended to discuss external stressors stemming from work as a cause of hypertension. Men were concerned with frequent urination, decreased libido, and erectile dysfunction. CONCLUSION: Knowledge gained will inform development of patient-centered treatment plans and targeted behavioral and educational interventions.