Patient-specific factors relating to medication adherence in a post-percutaneous coronary intervention cohort

OUP accepted manuscript

OBJECTIVES

To investigate relationships between factors influencing medication taking and behavioural determinants in patients who have undergone percutaneous coronary intervention (PCI).

METHODS

A cross-sectional survey using a postal questionnaire distributed to PCI patients. The questionnaire was iteratively developed by the research team with reference to the theoretical domains framework (TDF) of behavioural determinants, reviewed for face and content validity and piloted. Data were analysed using descriptive and principal component analysis (PCA). Inferential analysis explored relationships between PCA component scores and factors influencing medicating taking behaviour.

KEY FINDINGS

Adjusted response rate was 62.4% (325/521). PCA gave three components: (C1) Self-perceptions of knowledge and abilities in relation to medication taking; (C2) Aspects relating to activities and support in medication taking; (C3) Emotional aspects in taking medication. Generally, respondents held very positive views. Statistically significant relationships between all three components and self-reported chest pain/discomfort indicated patients with ongoing chest pain/discomfort post-PCI are more likely to have behavioural determinants and beliefs which make medication taking challenging. Respondents who were on 10 or more medications had lower levels of agreement with the C2 and C3 statements indicating challenges associated with their activities/support and anxieties in medication taking.

CONCLUSIONS

PCI patients show links between TDF behavioural determinants and factors influencing medication taking for those reporting chest pain or polypharmacy. Further research needs to explore the effective design and implementation of behavioural change interventions to reduce the challenge of medication taking.

Impacts of Type D Personality and Depression, Alone and in Combination, on Medication Non-Adherence Following Percutaneous Coronary Intervention

Background: Medication adherence after percutaneous coronary intervention (PCI) is essential to preventing the risk of restenosis. Even though Type D personality and depression have been known to affect medication non-adherence, their combined influence on PCI patients remains unclear. Aim: We aimed to identify how both Type D personality and depression were associated with medication non-adherence for 3 months after successful PCI. Methods: This prospective cohort study included 257 PCI patients, who took 3 or more cardiac medications, at a university hospital. We measured sociodemographic and clinical variables, Type D personality, depression, and medication non-adherence using face-to-face interviews and medical record reviews. Results: The total prevalence of medication non-adherence at the one- and three-month follow-ups was 14% and 16%, respectively. At one month, the prevalence of those with a combination of Type D personality and depression (23.4%) and depression alone (24%) was significantly higher than other groups. At three months, the prevalence of the Type D personality-only group (39.1%) was the highest. Type D personality increased the risk of medication non-adherence 5.089 times at three months, while depression increased it 2.6 times at one month. However, the risk of medication non-adherence was not increased in patients with combined Type D personality and depression. Conclusions: Individual assessments of Type D personality and depression are required. Therefore, psychological interventions focusing on personality and depression are crucial. Longitudinal follow-up studies must explore the interaction or individual impact of Type D personality and depression on medication non-adherence and other negative outcomes.

Challenges adhering to a medication regimen following first-time percutaneous coronary intervention: A patient perspective

BACKGROUND

Percutaneous coronary intervention is the most common therapeutic intervention for patients with narrowed coronary arteries due to coronary artery disease. Although it is known that patients with coronary artery disease often do not adhere to their medication regimen, little is known about what patients undergoing percutaneous coronary interventions find challenging in adhering to their medication regimen after hospital discharge.

OBJECTIVES

To explore patients' experiences in adhering to medications following early post-discharge after first-time percutaneous coronary intervention.

DESIGN

An abductive qualitative approach was used to conduct in-depth interviews of patients undergoing first-time percutaneous coronary intervention.

SETTINGS

Participants were recruited from a single tertiary university hospital, which services a large geographical area in western Norway. Patients fulfilling the inclusion criteria were identified through the Norwegian Registry for Invasive Cardiology.

PARTICIPANTS

Participants were patients aged 18 years or older who had their first percutaneous coronary intervention six to nine months earlier, were living at home at the time of study inclusion, and were prescribed dual antiplatelet therapy. Patients who were cognitively impaired, had previously undergone cardiac surgery, and/or were prescribed anticoagulation therapy with warfarin or novel oral anticoagulants were excluded. Purposeful sampling was used to include patients of different gender, age, and geographic settings. Twenty-two patients (12 men) were interviewed between December 2016 and April 2017.

METHODS

Face-to-face semi-structured interviews were conducted, guided by a set of predetermined open-ended questions to gather patient experiences on factors relating to medication adherence or non-adherence. Transcribed interviews were analysed by qualitative content analysis.

FINDINGS

Patients failed to adhere to their medication regimen for several reasons; intentional and unintentional reasons, multifaceted side effects from heart medications, scepticism towards generic drugs, lack of information regarding seriousness of disease after percutaneous coronary intervention, psychological impact of living with coronary artery disease, and these interacted. There were patients who felt that the medication information they received from physicians and nurses was uninformative and inadequate. Side effects from heart medications were common, ranging from minor ones to more disabling side effects, such as severe muscle and joint pain and fatigue. Patients found well established medication taking routines and aids to be necessary, and these improved adherence.

CONCLUSION

Patients undergoing first-time percutaneous coronary intervention face multiple, interacting challenges in trying to adhere to prescribed medications following discharge. This study highlights the need for a more structured follow-up care in order to improve medication adherence and to maximise their self-care abilities.

A qualitative study of patient involvement in medicines management after hospital discharge: an under-recognised source of systems resilience

INTRODUCTION

There are risks to the safety of medicines management when patient care is transferred between healthcare organisations, for example, when a patient is discharged from hospital. Using the theoretical concept of resilience in healthcare, this study aimed to better understand the proactive role that patients can play in creating safer, resilient medicines management at a common transition of care.

METHODS

Qualitative interviews with 60 cardiology patients 6 weeks after their discharge from 2 UK hospitals explored patients' experiences with their discharge medicines. Data were initially subjected to an inductive thematic analysis and a subsequent theory-guided deductive analysis.

RESULTS

During interviews 23 patients described medicines management resilience strategies in two main themes: identifying system vulnerabilities; and establishing self-management strategies. Patients could anticipate problems in the system that supplied them with medicines and took specific actions to prevent them. They also identified when errors had occurred both before and after medicines had been supplied and took corrective action to avoid harm. Some reported how they had not foreseen problems or experienced patient safety incidents. Patients recounted how they ensured information about medicines changes was correctly communicated and acted upon, and described their strategies to enhance their own reliability in adherence and resource management.

CONCLUSION

Patients experience the impact of vulnerabilities in the medicines management system across the secondary-primary care transition but many are able to enhance system resilience through developing strategies to reduce the risk of medicines errors occurring. Consequently, there are opportunities-with caveats-to elicit, develop and formalise patients' capabilities which would contribute to safer patient care and more effective medicines management.

Factors influencing oral adherence: qualitative metasummary and triangulation with quantitative evidence

BACKGROUND

Concern about adherence to oral agents among patients with cancer has grown as more oral agents are being used for cancer treatment. Knowledge of common factors that facilitate or inhibit adherence to oral medication regimens can be beneficial to clinicians in identifying patients at risk for nonadherence, in planning care to address barriers to adherence, and in educating patients about ways to improve adherence.

OBJECTIVES

The focus of this review is to synthesize the evidence about factors that influence adherence and identify implications for practice.

METHODS

Literature was searched via PubMed and CINAHL®. Evidence regarding factors influencing adherence was synthesized using a metasummary of qualitative research and triangulated with findings from quantitative research.

FINDINGS

Forty-four factors influencing adherence were identified from 159 research studies of patients with and without cancer. Factors associated with adherence in oncology and non-oncology cases included provider relations, side effects, forgetfulness, beliefs about medication necessity, establishing routines for taking medication, social support, ability to fit medications in lifestyle, cost, and medication knowledge. Among patients with cancer, depression and negative expectations of results also were shown to have a negative relationship to adherence.

Knowledge, attitudes and beliefs of patients and carers regarding medication adherence: a review of qualitative literature

PURPOSE

The aim of this review is to cohere evidence on the knowledge, attitudes and beliefs of patients and carers regarding medication adherence. Medication adherence refers to "the extent to which the patient's action matches the agreed recommendations". Medication adherence is vital in preventing, managing and curing illnesses and, hence, is linked with positive health outcomes.

METHODS

A search was conducted using the following databases: CINAHL, Embase, PubMed and Web of Knowledge from inception to November 2013. Titles and abstracts were screened for inclusion in the review according to pre-defined inclusion and exclusion criteria. Studies were assessed for quality, and data were extracted into a data extraction form. Results were analysed thematically.

RESULTS

The final results included 34 articles. Eight analytical themes were identified: (i) beliefs and experiences of medicines, (ii) family support and culture, (iii) role of and relationship with health-care practitioners, (iv) factors related to the disease, (v) self-regulation, (vi) communication, (vii) cost and (viii) access. The theme, "beliefs and experiences of medicines", was present in 33 studies, with many discussing the influence that side effects have on medication adherence.

CONCLUSIONS

There are a number of variables that impact upon the knowledge, attitudes and beliefs of patients and carers regarding medication adherence. This review presents an overview of the analytical themes which offers the opportunity to examine interventions and their relative efficacies to increase medication adherence.

Medication taking in coronary artery disease: a systematic review and qualitative synthesis

PURPOSE

Despite the compelling evidence supporting cardiovascular medications in the secondary prevention of coronary artery disease, many patients discontinue treatment. In this synthesis, we sought to understand from a patient perspective the factors that promote medication persistence.

METHODS

We systematically searched 7 databases (MEDLINE, Embase, PsycINFO, SCOPUS, CINAHL, ASSIA, and SSCI) for published qualitative research about the medication-taking experiences of patients with coronary artery disease and their partners. Articles were assessed for quality using a modified CASP (Critical Appraisal Skills Programme) checklist. Synthesis was undertaken using well-established meta-ethnographic approaches.

RESULTS

We included 17 articles in the final synthesis from the United Kingdom (6), Europe (5), United States (4), China (1), and Australia (1), with a total sample size of 391 patients. Analyses suggested that some patients hold fatalistic beliefs about their disease, whereas others believe they have been cured by interventions; both can lead to failure to take medication. Patients who adapt to being a "heart patient" are positive about medication taking. Some individuals dislike taking tablets generally and are wary of long-term effects. Relationships with prescribing clinicians are of critical importance for patients, with inaccessibility and insensitive terminology negatively affecting patients' perceptions about treatments.

CONCLUSIONS

Strategies to promote higher persistence of secondary prevention medications in patients with coronary artery disease need to recognize the key role of the prescribing clinician. Providing medication-specific information at the time of initiating therapy, improving the transition between secondary and primary care, and explaining the risk of disease recurrence may all help to modify patient attitudes toward drugs to prevent further cardiovascular disease.

Optimal medical therapy and percutaneous coronary intervention for stable angina: why patients should 'be taking' and 'keep taking' the tablets

WHAT IS KNOWN AND OBJECTIVE

Cardioprotective drug regimens improve outcomes in patients with stable coronary artery disease. Revascularization is recommended for the persistence of symptoms despite optimal medical therapy (OMT) or in patients likely to derive prognostic benefit. Our objective is to comment on recent evidence that initiation of OMT is suboptimal in patients undergoing percutaneous coronary intervention (PCI) but conversely adherence to medication may be higher in patients treated with PCI.

COMMENT

Large randomized controlled trials demonstrate that the risk of death or myocardial infarction is similar in patients treated by OMT alone and those treated with PCI and OMT. Despite the recommendations of international practice guidelines, OMT remains underutilized in recent analyses of patients referred for PCI. Notwithstanding the underutilization of proven therapies, a recent study suggests that adherence to medication is significantly higher in patients treated with PCI than in those treated with OMT alone. We discuss the potential factors that may contribute to underprescription of OMT and predict adherence in patients undergoing PCI.

WHAT IS NEW AND CONCLUSION

Contemporary studies continue to demonstrate underutilization of OMT in patients referred for PCI but increased medication adherence in patients treated by PCI. We argue for increased recognition of OMT as the definitive treatment for stable angina, so that we can be sure those patients who require PCI 'are taking' and 'keep taking' the tablets.

[Perceived health status and pharmacological adherence of patients who underwent percutaneous coronary intervention]

The objectives of this study were to evaluate the perceived health status and pharmacological adherence, and to verify the correlation between these measures in patients who underwent percutaneous coronary intervention, after hospital discharge. It was a cross-sectional study carried out from May 2011 to July 2012. The instruments used were: SF-86 and Measurement of Adherence to Treatment, with 101 patients, 54 (53.5%) of which were men; average age of 59.5 +/- 10.3; and 32 (32.7%) with previous cardiac treatment. All study participants were using antihypertensive drugs; the majority 99 (98%) used antiplatelet drugs; 98 (97%) used cholesterol reducers, and 59 (58.4%) used coronary vasodilators. The average number of drugs used was 6.8 +/- 2.1. Pharmacological adherence was observed in 98 (97%) patients. The participants presented best perceived health status in Social Functioning and Physical Functioning. Positive correlations of moderate magnitude were found between measurements of pharmacological adherence and Physical Functioning, General Health and Social Functioning. There was correlation between pharmacological adherence and perceived health status.

How patient beliefs affect adherence to prescribed medication regimens

This article analyses the evidence relating to patients' beliefs and adherence to prescribed medication regimens. Between 30% and 50% of patients question the appropriateness and effectiveness of their prescribed medication and often do not comply with their regimens, which means significant amounts of NHS cash is wasted on unused medications. A critical analysis of published literature from several electronic databases and professional journals was undertaken. This showed a strong qualitative relationship between patients' beliefs about their medication and adherence to regimens. Better communication with and involvement of patients in the decision-making process of medication prescribing is significant in reducing misconceptions, improve beliefs and promote adherence to prescribed regimens.