Faculty Bibliography

BACKGROUND: Sub-Saharan Africa (SSA) is facing a double burden of disease with a rising prevalence of non-communicable diseases (NCDs) while the burden of communicable diseases (CDs) remains high. Despite these challenges, there remains a significant need to understand how or under what conditions health interventions implemented in sub-Saharan Africa are sustained. The purpose of this study was to conduct a systematic review of empirical literature to explore how health interventions implemented in SSA are sustained. METHODS: We searched MEDLINE, Biological Abstracts, CINAHL, Embase, PsycInfo, SCIELO, Web of Science, and Google Scholar for available research investigating the sustainability of health interventions implemented in sub-Saharan Africa. We also used narrative synthesis to examine factors whether positive or negative that may influence the sustainability of health interventions in the region. RESULTS: The search identified 1819 citations, and following removal of duplicates and our inclusion/exclusion criteria, only 41 papers were eligible for inclusion in the review. Twenty-six countries were represented in this review, with Kenya and Nigeria having the most representation of available studies examining sustainability. Study dates ranged from 1996 to 2015. Of note, majority of these studies (30 %) were published in 2014. The most common framework utilized was the sustainability framework, which was discussed in four of the studies. Nineteen out of 41 studies (46 %) reported sustainability outcomes focused on communicable diseases, with HIV and AIDS represented in majority of the studies, followed by malaria. Only 21 out of 41 studies had clear definitions of sustainability. Community ownership and mobilization were recognized by many of the reviewed studies as crucial facilitators for intervention sustainability, both early on and after intervention implementation, while social and ecological conditions as well as societal upheavals were barriers that influenced the sustainment of interventions in sub-Saharan Africa. CONCLUSION: The sustainability of health interventions implemented in sub-Saharan Africa is inevitable given the double burden of diseases, health care worker shortage, weak health systems, and limited resources. We propose a conceptual framework that draws attention to sustainability as a core component of the overall life cycle of interventions implemented in the region.

Members of racial/ethnic minorities, in contrast to majority groups, experience disparities in stroke risk factors, recognition, evaluation, and treatment. This article describes the use of qualitative methods to examine the cultural and lifestyle appropriateness, clarity of item-wording, comprehension of item intent, and conceptual equivalence of the developed Spanish and the revised English Stroke Action Test (which includes three additional atypical stroke symptoms more common in women). Thirty in-depth cognitive interviews were conducted (10 in Spanish) using concurrent structured probes. The desired ultimate outcome was to obtain conceptually equivalent measures in both languages. Four sources of variability in comprehension were identified: unfamiliar and/or idiosyncratic Spanish words used in translation; phrases in the original (English) and in the literal (Spanish) translation that were not understood; and unclear intended meaning of the original (English) items. Cognitive interviews helped identify problematic items, highlighted potential response errors, and provided insight regarding putative causes for inconsistent interpretation.

OBJECTIVE: There is a shortage of trained health care personnel for cervical cancer screening in low-/middle-income countries. We evaluated the feasibility and limited efficacy of a smartphone-based training of community health nurses in visual inspection of the cervix under acetic acid (VIA). MATERIALS AND METHODS: During April to July 2015 in urban Ghana, we designed and developed a study to determine the feasibility and efficacy of an mHealth-supported training of community health nurses (CHNs, n = 15) to perform VIA and to use smartphone images to obtain expert feedback on their diagnoses within 24 hours and to improve VIA skills retention. The CHNs completed a 2-week on-site introductory training in VIA performance and interpretation, followed by an ongoing 3-month text messaging-supported VIA training by an expert VIA reviewer. RESULTS: Community health nurses screened 169 women at their respective community health centers while receiving real-time feedback from the reviewer. The total agreement rate between all VIA diagnoses made by all CHNs and the expert reviewer was 95%. The mean (SD) rate of agreement between each CHN and the expert reviewer was 89.6% (12.8%). The agreement rates for positive and negative cases were 61.5% and 98.0%, respectively. Cohen kappa statistic was 0.67 (95% CI = 0.45-0.88). Around 7.7% of women tested VIA positive and received cryotherapy or further services. CONCLUSIONS: Our findings demonstrate the feasibility and efficacy of mHealth-supported VIA training of CHNs and have the potential to improve cervical cancer screening coverage in Ghana.

BACKGROUND: African Americans exhibit a lower degree of nocturnal blood pressure (BP) dipping compared with Whites, but the reasons for reduced BP dipping in this group are not fully understood. The aim of this study was to identify psychosocial factors associated with BP dipping in a population-based cohort of African Americans. METHODS: This cross-sectional study included 668 Jackson Heart Study (JHS) participants with valid 24-hour ambulatory BP data and complete data on psychosocial factors of interest including stress, negative emotions, and psychosocial resources (e.g., perceived support). The association of each psychosocial factor with BP dipping percentage and nondipping status (defined as <10% BP dipping) was assessed using linear and Poisson regression models, respectively, with progressive adjustment for demographic, socioeconomic, biomedical, and behavioral factors. RESULTS: The prevalence of nondipping was 64%. Higher depressive symptoms, higher hostility, and lower perceived social support were associated with a lower BP dipping percentage in unadjusted models and after adjustment for age, sex, body mass index, and mean 24-hour systolic BP (P < 0.05). Only perceived support was associated with BP dipping percentage in fully adjusted models. Also, after full multivariable adjustment, the prevalence ratio for nondipping BP associated with 1 SD (7.1 unit) increase in perceived support was 0.93 (95% CI: 0.88-0.99). No other psychosocial factors were associated with nondipping status. CONCLUSIONS: Lower perceived support was associated with reduced BP dipping in this study. The role of social support as a potentially modifiable determinant of nocturnal BP dipping warrants further investigation.

BACKGROUND: Many studies have examined the multiple correlates of non-adherence in Blacks. However, they are largely cross-sectional; thus, these studies are unable to examine their predictive value on long-term medication adherence. PURPOSE: The purpose of this study is to examine the predictive role of key psychosocial and interpersonal factors on changes in medication adherence over a 1-year period. METHODS: Data were collected from 815 Black patients with hypertension followed in community health centers. Hypothesized predictor variables included self-efficacy, depressive symptoms, social support, and patient-provider communication measured at baseline, 6, and 12 months. The dependent variable, medication adherence was assessed at baseline, 6, and 12 months. Latent Growth Modeling was used to evaluate the pathways between the latent predictor variables and medication adherence. RESULTS: Participants were mostly female, low-income, with high school education or less, and mean age of 57 years. At baseline, high self-efficacy was associated with low depressive symptoms (beta = -0.22, p = 0.05), collaborative patient-provider communication (beta = 0.17, p = 0.006), and better medication adherence (beta = 1.04, p < 0.001). More social support and collaborative patient-provider communication were associated with low depressive symptoms (beta = -0.08, p = 0.02; beta = -0.18, p = 0.01). More social support was positively associated with collaborative patient-provider communication (beta = 0.32, p < 0.001). In the longitudinal model, increasing self-efficacy over time predicted improvements in medication adherence 1 year later (beta = 1.76, p < 0.001; CFI = 0.95; RMSEA = 0.04; SRMR = 0.04; Chi-Squared Index of Model Fit = 1128.54). CONCLUSIONS: Self-efficacy is a key predictor of medication adherence over time in Black patients with hypertension. Initial levels of self-efficacy are influenced by the presence of depressive symptoms as well as the perceived quality of patient-provider communication.

OBJECTIVE: Our objective was to determine the effectiveness of combining positive affect and self-affirmation strategies with motivational interviewing in achieving blood pressure control among hypertensive African Americans (AA) compared with AA hypertensives in an education-only control group. DESIGN: Randomized trial. SETTING: Ambulatory practices in the South Bronx and Harlem, New York City. PARTICIPANTS: African American adults with uncontrolled hypertension. INTERVENTIONS: Participants were randomized to a positive affect and self-affirmation intervention or an education control group. The positive affect and self-affirmation intervention involved having participants think about things that made them happy and that reminded them of their core values on a daily basis. These strategies were reinforced every two months through motivational interviewing. The control arm received a workbook of strategies on blood pressure control. All participants were called every two months for one year. MAIN OUTCOMES: Blood pressure control rate. RESULTS: A total of 238 participants were randomized. The average age was 56 +/- 11 years, approximately 70% were female, 80% were not married, and up to 70% had completed high school. There was no difference in control rates between the intervention and the control group. However, at one year, female participants were more likely to be controlled. Participants with high depressive symptoms or high perceived stress at baseline were less likely to be controlled. CONCLUSIONS: While this study did not demonstrate an intervention effect, it does provide important insight into the psychosocial factors that may underlie blood pressure control in African Americans. Implications for future behavioral intervention trials are discussed.

PURPOSE: We undertook a study to determine the rates, predictors, and barriers to blood pressure control among homeless and nonhomeless hypertensive adult patients from 10 New York City shelter-based clinics. METHODS: The study was a retrospective chart review of blood pressure measurements, sociodemographic characteristics, and factors associated with homelessness and hypertension extracted from the medical records of a random sample of hypertensive patients (N = 210) in 2014. RESULTS: Most patients were African American or Hispanic; 24.8% were female, and 84.3% were homeless for a mean duration of 3.07 years (SD = 5.04 years). Homeless adult patients were younger, had less insurance, and were more likely to be a current smoker and alcohol abuser. Of the 210 hypertensive patients, 40.1% of homeless and 33.3% of nonhomeless patients had uncontrolled blood pressure (P = .29) when compared with US rates for hypertensive adults, which range between 19.6% and 24.8%, respectively; 15.8% of homeless patients had stage 2 hypertension (P = .27). Homeless hypertensive patients with diabetes or multiple chronic diseases had better blood pressure control (P <.01). In logistic regression, lack of insurance was associated with inadequate blood pressure control (P <.05). CONCLUSIONS: The high rate of uncontrolled hypertension among hypertensive homeless adults is alarming. We propose comprehensive approaches to improve social support, access to medical insurance, and medication adherence, the lack of which complicate blood pressure control, targeted health education, and life style modifications using mobile health strategies for this mobile population.

OBJECTIVES: To compare the efficacy and safety of angiotensin-converting enzyme inhibitors (ACEis) and angiotensin receptor blockers (ARBs) in patients without heart failure. PATIENTS AND METHODS: Meta-analysis of randomized trials identified using PubMed, Embase, and Cochrane Central Register of Controlled Trials searches from January 1, 1980, through April 13, 2015, of ACEis and ARBs compared with placebo or active controls and corroborated with head-to-head trials of ARBs vs ACEis. Outcomes were all-cause mortality, cardiovascular death, myocardial infarction (MI), angina, stroke, heart failure, revascularization, and new-onset diabetes. RESULTS: Our search yielded 106 randomized trials that enrolled 254,301 patients. Compared with placebo, ACEis but not ARBs reduced the outcomes of all-cause mortality (ACEis vs placebo: relative risk [RR], 0.89; 95% CI, 0.80-1.00; ARBs vs placebo: RR, 1.01; 95% CI, 0.96-1.06; Pinteraction=.04), cardiovascular death (RR, 0.83; 95% CI, 0.70-0.99 and RR, 1.02; 95% CI, 0.92-1.14; Pinteraction=.05), and MI (RR, 0.83; 95% CI, 0.78-0.90 and RR, 0.93; 95% CI, 0.85-1.03; Pinteraction=.06). The meta-regression analysis revealed that the difference between ACEis and ARBs compared with placebo was due to a higher placebo event rate in the ACEis trials (most of these trials were conducted a decade earlier than the ARB trials) for the outcome of all-cause mortality (P=.001), cardiovascular death (P<.001), and MI (P=.02). Sensitivity analyses restricted to trials published after 2000 revealed similar outcomes with ACEis vs placebo and ARBs vs placebo (Pinteraction>.05). Head-to-head comparison trials of ARBs vs ACEis exhibited no difference in outcomes except for a lower risk of drug withdrawal due to adverse effects with ARBs (RR, 0.72; 95% CI, 0.65-0.81). CONCLUSION: In patients without heart failure, evidence from placebo-controlled trials (restricted to trials after 2000), active controlled trials, and head-to-head randomized trials all suggest ARBs to be as efficacious and safe as ACEis, with the added advantage of better tolerability.

OBJECTIVE: Obstructive sleep apnea (OSA) is a leading sleep disorder that is disproportionately more prevalent in minority populations and is a major risk factor for cardiovascular disease (CVD) morbidity and mortality. OSA is associated with many chronic conditions including hypertension, diabetes, and obesity, all of which are disproportionately more prevalent among blacks (ie, peoples of African American, Caribbean, or African descent). METHODS: This article reviews studies conducted in the United States (US) that investigated sleep screenings and adherence to treatment for OSA among blacks. In addition, guidelines are provided for implementing a practical framework to increase OSA screening and management among blacks. RESULTS: Several studies have documented racial/ethnic disparities in adherence to treatment for OSA. However, despite its public health significance, there is a paucity of studies addressing these disparities. Further, there is a lack of health programs and policies to increase screening and treatment of OSA among blacks and other minority populations. A practical framework to increase the number of blacks who are screened for OSA and treated appropriately is warranted. Such a framework is timely and major importance, as early identification of OSA in this high-risk population could potentially lead to early treatment and prevention of CVD, thereby reducing racial and ethnic disparities in sleep-related CVD morbidity and mortality.