ABSTRACT
@#Introduction: Previous medication adherence studies primarily focused on the domains of non-adherence in hypertension treatment and less attention has been given on domains that encourage adherence to anti-hypertensive medications. The current study is aimed to identify the domains of adherence and non-adherence to anti-hypertensive medications among hypertensive patients in Kuala Lumpur, Malaysia. Methods: Hypertensive patients from two public health clinics in Kuala Lumpur were invited for in-depth interviews until thematic saturation. Audio recordings from these interviews were transcribed verbatim. Transcripts were then analysed deductively with the guidance of the World Health Organization Medication Adherence Framework to extract the domains of adherence and non-adherence to anti-hypertensive medications. Results: Ten patients who were predominantly Malays and aged 34-73 years old participated the study. Patient-related (encompassing knowledge, attitude, belief and culture, lifestyle, personal barriers, self-efficacy, and cue to action), socioeconomic (encompassing social support), condition-related (encompassing nature of illness and presence of multiple co-morbidities), therapy-related (encompassing experience of receiving treatment, barrier in treatment, and side effects of treatment), and healthcare system (encompassing access to healthcare and healthcare center experience) domains were identified as central to the medication-taking behaviour of hypertensive patients. Conclusion: Sixteen codes of adherence and 22 codes of non-adherence to anti-hypertensive medications were identified, which were distributed across five domains (patient-related, socioeconomic, condition-related, therapy related, and healthcare system domains). These findings can help to inform future development of medication adherence questionnaires, individualised interventions for patients with adherence problems, and targeted health promotion programmes to reduce uncontrolled hypertension.
ABSTRACT
@#Introduction: Domains of adherence and non-adherence to hypertensive medications have not been extensively documented in Malaysia due to the absence of theoretically driven and culturally appropriate measurement tools, leading to a poor understanding of the adherence and underlying factors. We aim to identify these domains in Malaysian hypertensive patients and subsequently apply the findings to develop and validate the Malaysian Anti-Hypertensive Agents Non-Adherence Scale (MAANS). Methods: This study has an exploratory mixed-methods design. In Phase 1, we will recruit hypertensive patients from two health clinics to participate in a semi-structured interview. Recruitment of participants will terminate once thematic saturation is achieved. Coding and thematic analyses will be performed to identify the domains of adherence and non-adherence to anti-hypertensive medications. In Phase 2, based on the domains generated from Phase 1, we will develop the Malaysian Anti-Hypertensive Agents Non-Adherence Scale (MAANS). Four hundred hypertensive patients will be randomly selected. Data from 200 participants (serving as the calibration sample) will be subjected to exploratory factor analysis while data from additional 200 participants (serving as the validation sample) will be subjected to confirmatory factor analysis. Factor structure, predictive validity, and reliability of the MAANS will be statistically tested. Discussion: With the presence of the MAANS, health care providers can gather crucial information regarding barriers and facilitators to hypertensive treatment adherence and design effective health promotion programmes to reduce complications of uncontrolled hypertension. Trial registration: Ethical approval is granted by the Medical Research Ethics Committee, Ministry of Health, Malaysia (NMRR-18-3251-44694).
ABSTRACT
@#A majority of hypertensive patients will end up suffering uncontrolled hypertension, which is partly due to poor medication adherence. This paper aimed to review a range of interventions that could improve anti-hypertensive medication adherence. Literature search was conducted using PubMed, Scopus, Medline, and Science Direct databases, with publication dates confined to between October 2009 and October 2019. Eventually, only 11 studies were used for this study. It was found that interventions that are based on or include patient education, patient interviews, patient reminders, self-management and behavioural modifications have the potential to improve patients’ adherence to anti-hypertensive therapy. Most successful interventions involve patient reminder, self-management and behavioural intervention.