Translation, Cultural Adaptation and Validation of the Hill Bone Compliance to High Blood Pressure Therapy Scale to Nepalese Language

Medication adherence scales in non-communicable diseases: A scoping review of design gaps, constructs and validation processes

INTRODUCTION

NCDs arise from complex interactions of modifiable factors such as unhealthy lifestyles, poor diet, and psychosocial challenges, along with non-modifiable factors like age and genetics. Notably, medication non-adherence is a widespread and growing concern, significantly contributing to disease progression and poor outcomes globally.

OBJECTIVE

This scoping review aims to synthesize evidence on medication adherence scales used for selected non communicable diseases. It examines their development methods, psychometric properties, and assessed domains, while identifying gaps or limitations in their design and application.

MATERIALS AND METHODS

The Joanna Briggs Institute methodological framework guided this scoping review and the protocol was registered prospectively to ensure methodological transparency and rigor. Electronic databases, the reference list of included articles, and grey literature were searched. Studies published in English from January 1950 to June 2024 were included. Two reviewers independently screened all articles, and a third reviewer settled any conflicts between the reviewers. Critical appraisal of the screened-in articles was done using JBI critical appraisal scales. The data was compiled into tables and a narrative summary that is consistent with the review's goal.

RESULTS

Our study included 140 articles, identifying 57 medication adherence scales. These scales, developed using qualitative methods (10.8%), literature review (32.4%), and mixed methods (45.9%), primarily focus on behavior, often neglecting cost-related non-adherence, self-efficacy, and systemic barriers. Psychometric findings varied widely, reflecting heterogeneity in study designs and scale development approaches. Many scales lack validation in diverse settings, underscoring the need for comprehensive, context-sensitive tools.

CONCLUSION

This scoping review highlights gaps in existing medication adherence scales for NCDs, particularly their limited consideration of socioeconomic and cultural factors and incomplete adherence assessment. Future research should focus on developing more holistic, contextually relevant adherence scales that integrate these dimensions. Strengthening adherence measurement methodologies can enhance patient-centered care, inform policy interventions, and improve health outcomes.

Evaluation of Hypertension-Related Knowledge, Medication Adherence, and Associated Factors Among Hypertensive Patients in the Aljouf Region, Saudi Arabia: A Cross-Sectional Study

Background and Objectives: Hypertensive patients' knowledge and adherence to prescribed medicines are critical in managing their condition, as poor adherence may lead to adverse cardiac and cerebrovascular events. The present study assessed hypertension-related knowledge and medication adherence among hypertensive patients attending primary health centers (PHCs) in the Aljouf Province, Saudi Arabia. Materials and Methods: Using a cross-sectional design, we conducted this survey on 390 patients. Self-reported hypertension knowledge was assessed using the Hypertension Knowledge Level Scale (HK-LS), and medication adherence was determined using the Hill-Bone Medication Adherence Scale. We used binomial regression analysis (adjusted with other variables) to find the associated factors of medication adherence. Results: This study found that nearly half (49.2%) of the participants had inadequate knowledge, and poor medication adherence was noted in 40.8% of the participants. We found a positive correlation between HK-LS and the Hill-Bone Medication Adherence Scale scores (Spearman's rho = 0.312, p = 0.002). Medication adherence was significantly associated with job status (private sector (ref: public sector, adjusted odds ratio [AOR] = 2.02, 95% CI = 1.18-3.62, p = 0.005)), living in an urban region (ref: rural, AOR = 3.61, 95% CI = 1.85-5.72, p = 0.002), and duration since diagnosis of more than 5 years (ref: ≤1 year, AOR = 3.53, 95% CI = 2.36-4.95, p = 0.001). Conclusions: The present study findings indicate that there is still a critical gap in managing hypertension at the PHCs in this region, and this may lead to poor health outcomes among the patients and burden the healthcare system. Hence, continuous patient education and targeted counseling are recommended for those with poor medication adherence.

Treatment Adherence and Health-Related Quality of Life Among Patients with Hypertension at Tertiary Healthcare Facility in Lalitpur, Nepal: A Cross-Sectional Study

Background

Measurement of medication adherence and health-related quality of life is extremely important when planning different health policies. Drug therapy and adherence to medication are critical to prevent complications of hypertension, especially in countries like Nepal, where hypertension is one of the most prevalent diseases. However, this has not been studied in Nepal. This study, hence, aimed to explore medication adherence, factors affecting medication adherence, health-related quality of life, and the correlation between medication adherence and health-related quality of life in hypertensive patients visiting tertiary care health facilities in Lalitpur district of Nepal.

Methodology

This quantitative cross-sectional study was conducted among 380 hypertensive patients at KIST Medical College and Teaching Hospital, Lalitpur, Nepal. The Nepali version of the European Quality of Life tool EQ-5D-5L and the Hill-Bone Compliance to High Blood Pressure Therapy Scale (HBCTS) were used. Intergroup differences in medication adherence, the EQ-5D index and EQ-VAS scores were assessed for statistical significance using either the Mann-Whitney or Kruskal-Wallis tests for numerical data. Spearman correlation coefficient was used to identify the relationship among medication adherence, EQ-5D-5L index values, and EQ-VAS scores.

Results

The mean treatment score was 22.43 ± 4.12. Age, sex, and occupation were significant factors that affected treatment adherence. The EQ-5D score was 0.72 with age, sex, income, and educational status as significant factors and marital status as an insignificant factor. A slightly negative correlation was found between the total treatment adherence score and the EQ-5D index.

Conclusion

The treatment adherence of patients to antihypertensive therapy was suboptimal, which could affect the outcome of therapy. Better treatment adherence was correlated with a better health-related quality of life. Hence, both health-care providers and patients should make efforts to increase treatment adherence to attain better HRQOL.

Knowledge, Adherence, and Satisfaction With Warfarin Therapy and Associated Factors Among Outpatients at University Teaching Hospital in Ethiopia

Anticoagulation management using warfarin is challenging in clinical practice. This study aimed to evaluate the knowledge, adherence, and satisfaction with warfarin therapy and associated factors among outpatients at the Tikur Anbessa Specialized Hospital (TASH) in Addis Ababa, Ethiopia. An interview-based cross-sectional study was conducted among 350 patients receiving warfarin therapy at cardiac and hematology clinics of TASH. Anticoagulation knowledge assessment (AKA) questionnaires assessed the patients' warfarin knowledge. Adherence to warfarin was evaluated using the Morisky Green Levine Scale (MGLS), and patient satisfaction with warfarin therapy was assessed using the 17-item anticlot treatment scale (ACTS). Binary logistic regression was used to determine factors associated with the outcome variables, and p < .05 was used as the cut-off point to declare a significant association. The mean AKA score was 59.35  ±  13.04% (10.68  ±  2.34 correct answers), and 82 (23.4%) of participants achieved a passing score. Based on the MGLS, 192 (54.9%) study participants adhered well to warfarin. The mean level of satisfaction was 53.67  ±  8.56, with mean scores of 41.93  ±  7.80 and 11.74  ±  2.43 in the ACTS burden and benefit subscales, respectively. One hundred eighty-four (52.6%) patients were satisfied with warfarin therapy. The absence of hyperthyroidism was significantly associated with poor knowledge of warfarin therapy (adjusted odds ratio [AOR] = 4.28, 95% confidence interval [CI]: 1.01-18.22). Those living with family had a 56% lower chance of poor warfarin adherence (AOR: 0.44; 95% CI: 0.21-0.93) than those living alone. This study shows room for improvement in patient knowledge, adherence, and satisfaction with warfarin therapy.

Non-adherence to anti-hypertensive medications in a low-resource country Nepal: a systematic review and meta-analysis

Background

Nepal is a low resource country with cardiovascular diseases being the number one cause of mortality. Despite hypertension being the single most important risk factor for cardiovascular diseases, non-adherence to anti-hypertensive medications has not been assessed systematically. So, this systematic review and meta-analysis aims to analyze the prevalence of non-adherence to anti-hypertensive medications in Nepal.

Methodology

This systematic review and meta-analysis was piloted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. Electronic databases of Embase, PubMed, Scopus, Web of Science, Cochrane Library, Cinhal Plus, and Google Scholar were searched from inception till 1 February 2023. The random-effects model with 95% confidence interval (CI) was used to calculate the non-adherence rate.

Results

Altogether, 14 studies with a total of 3276 hypertensive patients were included in the meta-analysis. The pooled prevalence of non-adherence to anti-hypertensive medications was 49% (95% CI: 0.37-0.62, I2=98.41%, P<0.001). The non-adherence rate using Morisky Medication Adherence Scale (MMAS) was 55% (95% CI: 0.34-0.76, I2=99.14%, P<0.001), and using Hill-Bone Compliance Scale, the non-adherence rate was 45% (95% CI: 0.37-0.54, I2=84.36%, P<0.001). In subgroup analysis, the non-adherence was higher in rural areas 56% (95% CI: 0.51-0.61, I2=0.0%, P=0.46) compared to urban areas 42% (95% CI: 0.31-0.54, I2=96.90%, P<0.001). The trend of non-adherence was increasing after 2020. Additionally, forgetfulness, carelessness, cost of medications, number of comorbidities, and using an alternate form of medication were common factors associated with non-adherence.

Conclusions

This meta-analysis showed that half of the hypertensive population of Nepal are non-adherent to their anti-hypertensive medications, thereby posing a significant long-term cardiovascular consequence among Nepali population.

Test performance of self-report adherence tools in patients with hypertension: A systematic review and a meta-analysis

WHAT IS KNOWN AND OBJECTIVES

Adherence has proved to have a positive influence on achieving plausible treatment outcomes. Self-report questionnaires are widely used in evaluating adherence, creating thus a high-powered research field. This review aims to provide an update of scales used in hypertension, which are compared and analysed against reliability and validity.

METHODS

PubMed, Web of Science and Cochrane Library were searched in May 2022 to identify studies. We extracted the study characteristics and evaluated their quality. A random-effects model with subgroup analysis was used to calculate estimates and heterogeneity parameters as well as regressions, funnel and forest plots. A bivariate model was selected to conduct validity analyses and draw receiver operating characteristic (ROC) curves.

RESULTS AND DISCUSSION

Fifty-five articles were identified and classified into 22 different reliable and validated tools. Pooled analyses predicted an overall good Cronbach's alpha of 0.76 (95%CI:0.67-0.83), a good ICC of 0.8 (95%CI:0.72-0.86) and an excellent correlation coefficient of 0.91 (95%CI:0.86-0.95), which all showed high heterogeneity and slight detection of asymmetry. Regression analyses showed that only time and the number of items/scale type influenced significantly retest and alpha, respectively. Overall validity showed acceptable sensitivity of 0.65 (95%CI:0.53-0.75) and specificity of 0.57 (95%CI:0.47-0.67) with a good Area Under Curve (AUC) of 0.637. Upon comparison, four tools showed superiority over Morisky's scale.

WHAT IS NEW AND CONCLUSION

Adherence is a multi-dimensional phenomenon, which deems scales to be highly variable or complex; thus, complicating the selection process. Adherence to Refills and Medications Scale (ARMS) is the most promising free non-inferior alternative to Morisky, the most used scale.