RESUMO
Background: Medication adherence is an integral component in the management of patients with co-morbid type 2 diabetes mellitus (T2DM) and hypertension. However due to their combined conditions, there is likelihood of polypharmacy and medication-related burden, which could negatively impact adherence to therapy. This study aimed to assess the perceived medication-related burden among patients with co-morbid T2DM and hypertension and to evaluate the association between the perceived burden and adherence to medication therapy. Methods: A cross-sectional study was conducted among adult patients with co-morbid T2DM and hypertension attending a primary health facility. The living with medicines questionnaire and the medication adherence report scale were used to assess extent of medication-related burden and adherence respectively. Binary logistic regression model was used to estimate the adjusted odds and their corresponding 95% confidence interval for medication-related burden and adherence outcomes. All observed categorical variables were considered for the multivariable binary logistic regression model. Results: The total number of participants was 329 with a median age of 57.5 ± 13.2 years. The median score for the overall burden was 99 (IQR: 93-113), and this significantly varied by sex (p = 0.012), monthly income (p = 0.025), monthly expenditure on medications (p = 0.012), frequency of daily dose of medications (p = 0.020) and family history of T2DM (p < 0.001). About 30.7% and 36.8% of participants reported moderate/high burden and medication adherence respectively. Uncontrolled diastolic blood pressure (AOR: 2.46, 95% CI: 1.20-5.05, p = 0.014), high glucose (AOR: 4.24, 95% CI: 2.13-8.46, p < 0.001) and no family history of T2DM (AOR: 2.14, 95% CI: 1.14-4.02, p = 0.026) were associated with moderate/high medication burden. Uncontrolled diastolic blood pressure (AOR: 0.48, 95% CI: 0.25-0.94, p = 0.031), at least 5 years since hypertension diagnosis (AOR: 0.55, 95% CI: 0.30-0.99, p = 0.045) and moderate/high medication-related burden (AOR: 0.33, 95% CI: 0.16-0.69, p = 0.003) were associated with lower odds of medication adherence. Conclusion: These findings suggest that to improve the preventive and optimal care of patients with T2DM and hypertension, interventions that aim to reduce medication-related burden and morbidity are recommended. The study proposes that health stakeholders such as clinicians, pharmacists, and policy makers, develop multidisciplinary clinical and pharmaceutical care interventions to include provision of counselling to patients on adherence. In addition, developing policies and sensitization activities on deprescribing and fixed-dose drug combinations aimed at reducing medication-related burden, while promoting better adherence, blood pressure and blood glucose outcomes are recommended.
RESUMO
Hypertension and diabetes are major risk factors for cardiovascular diseases and optimal control of blood pressure (BP) and blood glucose are associated with reduced cardiovascular disease events. This study, therefore, sought to estimate the prevalence and associated factors of controlled BP and blood glucose levels among patients diagnosed with both hypertension and Type 2- diabetes mellitus (T2DM). A quantitative cross-sectional study was conducted in a primary health setting in Ghana among patients 18 years and older diagnosed with both hypertension and T2DM. Pearson's chi-square was used to assess the association between BP and blood glucose levels and the independent variables. The multivariable binary logistic regression model was used to assess the adjusted odds of controlled BP and blood glucose levels. Among the 329 participants diagnosed with both hypertension and T2DM, 41.3% (95% CI: 36.1-46.8%) had controlled BP, 57.1% (95% CI: 51.7-62.4%) had controlled blood glucose whilst 21.8% (95% CI: 17.7-26.7%) had both controlled BP and blood glucose levels. Increased age, non-formal education, non-married, employed, single-dose anti-hypertensives or anti-diabetic medications, and hyperlipidaemia or stroke co-morbidities were positively associated with controlled BP levels. Being female, married, taking 2 or more anti-hypertensive medications, and moderate to high medication-related burden were positively associated with controlled blood glucose levels. In terms of both controlled BP and blood glucose levels, being employed, reduced income level, being registered with national health insurance, single anti-diabetes or anti-hypertensive medications, hyperlipidaemia or stroke co-morbidities, and moderate to high medication-related burden were positively associated with having both controlled BP and blood glucose levels. One in five patients with hypertension and T2DM had both BP and blood glucose levels under control. The benefits and risks of blood pressure and blood glucose targets should thus be factored into the management of patients with hypertension and T2DM.