Medication non-adherence in the elderly: how big is the problem?

Evaluating the integration of chronic disease prevention and management services into primary health care

Background

The increasing number of patients with chronic diseases represents a challenge for health care systems. The Chronic Care Model suggests a multi-component remodelling of chronic disease services to improve patient outcomes. To meet the complex and ongoing needs of patients, chronic disease prevention and management (CDPM) has been advocated as a key feature of primary care producing better outcomes, greater effectiveness and improved access to services compared to other sectors. The objective of this study is to evaluate the adaptation and implementation of an intervention involving the integration of chronic disease prevention and management (CDPM) services into primary health care.

Methods/Design

The implementation of the intervention will be evaluated using descriptive qualitative methods to collect data from various stakeholders (decision-makers, primary care professionals, CDPM professionals and patients) before, during and after the implementation. The evaluation of the effects will be based on a combination of experimental designs: a randomized trial using a delayed intervention arm (n = 326), a before-and-after design with repeated measures (n = 163), and a quasi-experimental design using a comparative cohort (n = 326). This evaluation will utilize self-report questionnaires measuring self-efficacy, empowerment, comorbidity, health behaviour, functional health status, quality of life, psychological well-being, patient characteristics and co-interventions. The study will take place in eight primary care practices of the Saguenay region of Quebec (Canada). To be included, patients will have to be referred by their primary care provider and present at least one of the following conditions (or their risk factors): diabetes, cardiovascular diseases, chronic obstructive pulmonary disease, asthma. Patients presenting serious cognitive problems will be excluded.

Discussion

In the short-term, improved patient self-efficacy and empowerment are expected. In the mid-term, we expect to observe an improvement in health behaviour, functional health status, quality of life and psychological well-being. At the organizational level, the project should lead to coordinated service delivery, improved patient follow-up mechanisms and enhanced interprofessional collaboration. Integration of CDPM services at the point of care in primary care practices is a promising innovation in care delivery that needs to be thoroughly evaluated.

Trial registration

ClinicalTrials.gov Identifier: NCT01319656

Predictors of medication adherence in elderly patients with chronic diseases using support vector machine models

Objectives

The aim of this study was to establish a prediction model of medication adherence in elderly patients with chronic diseases and to identify variables showing the highest classification accuracy of medication adherence in elderly patients with chronic diseases using support vector machine (SVM) and conventional statistical methods, such as logistic regression (LR).

Methods

We included 293 chronic disease patients older than 65 years treated at one tertiary hospital. For the medication adherence, Morisky's self-report was used. Data were collected through face-to-face interviews. The mean age of the patients was 73.8 years. The classification process was performed with LR (SPSS ver. 20.0) and SVM (MATLAB ver. 7.12) method.

Results

Taking into account 16 variables as predictors, the result of applying LR and SVM classification accuracy was 71.1% and 97.3%, respectively. We listed the top nine variables selected by SVM, and the accuracy using a single variable, self-efficacy, was 72.4%. The results suggest that self-efficacy is a key factor to medication adherence among a Korean elderly population both in LR and SVM.

Conclusions

Medication non-adherence was strongly associated with self-efficacy. Also, modifiable factors such as depression, health literacy, and medication knowledge associated with medication non-adherence were identified. Since SVM builds an optimal classifier to minimize empirical classification errors in discriminating between patient samples, it could achieve a higher accuracy with the smaller number of variables than the number of variables used in LR. Further applications of our approach in areas of complex diseases, treatment will provide uncharted potentials to researchers in the domains.

Characterizing caregiver-mediated medication management in patients with memory loss

Increasingly, family members are assisting with the complex task of medication management when patients are experiencing cognitive decline. To date, limited published research addresses caregiver-mediated medication management of patients with impaired cognition. Thus, the purpose of this study was to describe the characteristics and correlates of caregiver-mediated medication management in community-dwelling patients with memory loss. We used baseline data from the 91 patient-caregiver dyads participating in a randomized controlled trial designed to assist caregivers of patients with memory loss with medication management. The patient's level of cognitive impairment was not related to medication errors; however, the number of medications that patients were prescribed and taking was related to medication errors. Important factors to consider when discussing medication management with caregivers of patients with memory loss include the caregiver's age, cognitive ability, and depressive symptoms, as well as the caregiver's perception of the impact of the patient's behavioral problems.

Asthma beliefs are associated with medication adherence in older asthmatics

BACKGROUND

Empirical research and health policies on asthma have focused on children and young adults, even though asthma morbidity and mortality are higher among older asthmatics.

OBJECTIVE

To explore the relationship of asthma-related beliefs and self-reported controller medication adherence in older asthmatics.

DESIGN

An observational study of asthma beliefs and self-management among older adults.

PARTICIPANTS

Asthmatics ages ≥ 60 years (N = 324, mean age 67.4 ± 6.8, 28 % white, 32 % black, 30 % Hispanic) were recruited from primary care practices in New York City and Chicago.

MAIN MEASURES

Self-reported controller medication adherence was assessed using the Medication Adherence Report Scale. Based on the Common Sense Model of Self-Regulation, patients were asked if they believe they only have asthma with symptoms, their physician can cure their asthma, and if their asthma will persist. Beliefs on the benefit, necessity and concerns of treatment use were also assessed. Multivariate logistic regression was used to examine the association of beliefs with self-reported medication adherence.

KEY RESULTS

The majority (57.0 %) of patients reported poor adherence. Poor self-reported adherence was more common among those with erroneous beliefs about asthma illness and treatments, including the "no symptoms, no asthma" belief (58.7 % vs. 31.7 %, respectively, p < 0.001), "will not always have asthma" belief (34.8 % vs. 12.5 %, p < 0.001), and the "MD can cure asthma" belief (21.7 % vs. 9.6 %, p = 0.01). Adjusting for illness beliefs, treatment beliefs and demographics, patients with a "no symptoms, no asthma" belief had lower odds of having good self-reported adherence (odds ratio [OR] 0.45, 95 % confidence interval [CI] 0.23-0.86), as did those with negative beliefs about the benefits (OR 0.73, 95 % CI 0.57-0.94) and necessity (OR 0.89, 95 % CI 0.83-0.96) of treatment.

CONCLUSIONS

Illness and treatment beliefs have a strong influence on self-reported medication adherence in older asthmatics. Interventions to improve medication adherence in older asthmatics by modifying illness and treatment beliefs warrant study.

Evidence-based strategies for the optimization of pharmacotherapy in older people

Geriatric pharmacotherapy represents one of the biggest achievements of modern medical interventions. However, geriatric pharmacotherapy is a complex process that encompasses not only drug prescribing but also age-appropriate drug development and manufacturing, appropriate drug testing in clinical trials, rational and safe prescribing, reliable administration and assessment of drug effects, including adherence measurement and age-appropriate outcomes monitoring. During this complex process, errors can occur at any stage, and intervention strategies to improve geriatric pharmacotherapy are targeted at improving the regulatory processes of drug testing, reducing inappropriate prescribing, preventing beneficial drug underuse and use of potentially harmful drugs, and preventing adverse drug interactions. The aim of this review is to provide an update on selected recent developments in geriatric pharmacotherapy, including age discrimination in drug trials, a new healthcare professional qualification and shared competence in geriatric drug therapy, the usefulness of information and communication technologies, and pharmacogenetics. We also review optimizing strategies aimed at medication adherence focusing on complex elderly patients. Among the current information technologies, there is sufficient evidence that computerized decision-making support systems are modestly but significantly effective in reducing inappropriate prescribing and adverse drug events across healthcare settings. The majority of interventions target physicians, for whom the scientific concept of appropriate prescribing and the acceptability of the alert system used play crucial roles in the intervention's success. For prescribing optimization, results of educational intervention strategies were inconsistent. The more promising strategies involved pharmacists or multidisciplinary teams including geriatric medicine services. However, methodological weaknesses including population and intervention heterogeneity do not allow for comprehensive meta-analyses to determine the clinical value of individual approaches. In relation to drug adherence, a recent meta-analysis of 33 randomized clinical trials in older patients found behavioural interventions had significant effects, and these interventions were more effective than educational interventions. For patients with multiple conditions and polypharmacy, successful interventions included structured medication review, medication regimen simplification, administration aids and medication reminders, but no firm conclusion in favour of any particular intervention could be made. Interventions to optimize geriatric pharmacotherapy focused most commonly on pharmacological outcomes (drug appropriateness, adverse drug events, adherence), providing only limited information about clinical outcomes in terms of health status, morbidity, functionality and overall healthcare costs. Little attention was given to psychosocial and behavioural aspects of pharmacotherapy. There is sufficient potential for improvements in geriatric pharmacotherapy in terms of drug safety and effectiveness. However, just as we require evidence-based, age-specific, pharmacological information for efficient clinical decision making, we need solid evidence for strategies that consistently improve the quality of pharmacological treatments at the health system level to shape 'age-attuned' health and drug policy.

Adherence and medication management by the elderly

AIMS AND OBJECTIVES

The purpose of this study was to explore the strategies used for medication management by elderly who live at home.

BACKGROUND

Non-adherence to chronic medication is a common problem among the elderly with chronic conditions. Many studies have been developed, but it did not progress in solving this multidisciplinary health care problem. The causes of non-adherence by the elderly are multiple and complex.

DESIGN

Descriptive qualitative design.

METHODS

Data were collected by two focus groups. The content of discussion was analysed from verbatim transcript and identifying categories and sub-categories emerged, leading to the construction of a diagram analysis.

RESULTS

The finding indicated the strategies and the interpretation of people aged 65 or more and with chronic illness, managing their medication. Four content categories emerged: to live with drugs, taking medication, belief about drugs and relationship with health professionals.

CONCLUSION

The study enabled us to identify and understand, by giving a 'voice' to the elderly, that living with drugs is a dynamic and complex process and that taking medication is perceived by older people as a consequence of their ageing, which requires them to include that process in their lives as a habit implying changes in their daily routines. The elderly suggest that the relationship with health professionals is essential in medication management and they reported that the information given by the nurse during consultation is very important.

RELEVANCE TO CLINICAL PRACTICE

The relationship with nurses in particular is an important issue for the older people. Understanding the factors of adherence and helping people are important areas of research in nursing. The quality of this relationship may be the key to increasing adherence in this group of people.

Medication management among home-dwelling older patients with chronic diseases: possible roles for community pharmacists

OBJECTIVE

To describe medication management among home-dwelling older adults. These data should allow us to identify potential problems and to indicate target areas for community pharmacist intervention.

DESIGN

Cross-sectional observational study.

SETTING

Community pharmacies (n=86) in Belgium.

PARTICIPANTS

Home-dwelling older adults using at least one chronic medicine (n=338).

MEASUREMENTS

Data on drug use were taken from the electronic pharmacy databases, while drug adherence was measured by pill count, self-report and estimation by GP and pharmacist. Drug knowledge and practical drug management capacity were assessed by patient interview and questionnaire, respectively.

RESULTS

The study population (n=338) used a median of 5 chronic drugs per patient. Half of our sample (n=169) used psychotropic medication chronically, mainly benzodiazepines. In 100 patients (29.6%) at least one drug-drug interaction of potential clinical significance was observed. The overall mean adherence per patient was very high (98.1%), but 39.6% of individuals was underadherent with at least one medication. Seventy-six % of patients had an acceptable knowledge of the indication for at least 75% of their medication. In nearly 15 % of the study population cognitive impairment was suspected by the mini-cog test. The participants reported several practical problems with drug taking: difficulties with vision (32.0%), blister opening (12.1%), tablet swallowing (14.8%), tablet splitting (29.7% [represents % of patients who have to split tablets]) and distinction between different drug packages (23.4%).

CONCLUSION

This study identified the following aspects of medication management by home-dwelling older adults that could be improved by pharmaceutical care services: (i) assistance of cognitively impaired patients, (ii) management of practical drug taking problems, (iii) DDI screening, (iv) drug adherence, and (v) chronic benzodiazepine use.

Medication use in the context of everyday living as understood by seniors

Recognizing that older adults are among the biggest consumers of medication, and the demographic group most likely to suffer an adverse drug reaction (ADR), this paper details the findings from a recent study on how older adults come to understand medication and its related use. Using a qualitative content analysis method, semi-structured interviews were conducted with 21 individuals from British Columbia, Canada. Study participants ranged in age from 65 to 89 years (male=9, female=11). Using NVIVO^® 7 software, data were subjected to comparative thematic content analysis in an effort to capture the role of medication use in the context of everyday living as understood by older adults. While there was variability in how older adults come to understand their medication use, an overarching theme was revealed whereby most participants identified their prescription medications as being life-sustaining and prolonging. Deeper thematic content analysis of participant narratives drew attention to three key areas: (A) medications are viewed as a necessary, often unquestioned, aspect of day-to-day life (B) a relationship is perceived to exist between the amount of medications taken and ones current state of health (C) the overall medication experience is positively or negatively influenced by the doctor patient relationship and the assumption that it is the physicians role to communicate medication information that will support everyday living. The article concludes that medical authority and the complexities surrounding medication use need to undergo significant revision if community dwelling older adults are to experience greater success in safely managing their health and medication-related needs.

A new taxonomy for describing and defining adherence to medications

Interest in patient adherence has increased in recent years, with a growing literature that shows the pervasiveness of poor adherence to appropriately prescribed medications. However, four decades of adherence research has not resulted in uniformity in the terminology used to describe deviations from prescribed therapies. The aim of this review was to propose a new taxonomy, in which adherence to medications is conceptualized, based on behavioural and pharmacological science, and which will support quantifiable parameters. A systematic literature review was performed using MEDLINE, EMBASE, CINAHL, the Cochrane Library and PsycINFO from database inception to 1 April 2009. The objective was to identify the different conceptual approaches to adherence research. Definitions were analyzed according to time and methodological perspectives. A taxonomic approach was subsequently derived, evaluated and discussed with international experts. More than 10 different terms describing medication-taking behaviour were identified through the literature review, often with differing meanings. The conceptual foundation for a new, transparent taxonomy relies on three elements, which make a clear distinction between processes that describe actions through established routines ('Adherence to medications', 'Management of adherence') and the discipline that studies those processes ('Adherence-related sciences'). 'Adherence to medications' is the process by which patients take their medication as prescribed, further divided into three quantifiable phases: 'Initiation', 'Implementation' and 'Discontinuation'. In response to the proliferation of ambiguous or unquantifiable terms in the literature on medication adherence, this research has resulted in a new conceptual foundation for a transparent taxonomy. The terms and definitions are focused on promoting consistency and quantification in terminology and methods to aid in the conduct, analysis and interpretation of scientific studies of medication adherence.

A new taxonomy for describing and defining adherence to medications

Interest in patient adherence has increased in recent years, with a growing literature that shows the pervasiveness of poor adherence to appropriately prescribed medications. However, four decades of adherence research has not resulted in uniformity in the terminology used to describe deviations from prescribed therapies. The aim of this review was to propose a new taxonomy, in which adherence to medications is conceptualized, based on behavioural and pharmacological science, and which will support quantifiable parameters. A systematic literature review was performed using MEDLINE, EMBASE, CINAHL, the Cochrane Library and PsycINFO from database inception to 1 April 2009. The objective was to identify the different conceptual approaches to adherence research. Definitions were analyzed according to time and methodological perspectives. A taxonomic approach was subsequently derived, evaluated and discussed with international experts. More than 10 different terms describing medication-taking behaviour were identified through the literature review, often with differing meanings. The conceptual foundation for a new, transparent taxonomy relies on three elements, which make a clear distinction between processes that describe actions through established routines ('Adherence to medications', 'Management of adherence') and the discipline that studies those processes ('Adherence-related sciences'). 'Adherence to medications' is the process by which patients take their medication as prescribed, further divided into three quantifiable phases: 'Initiation', 'Implementation' and 'Discontinuation'. In response to the proliferation of ambiguous or unquantifiable terms in the literature on medication adherence, this research has resulted in a new conceptual foundation for a transparent taxonomy. The terms and definitions are focused on promoting consistency and quantification in terminology and methods to aid in the conduct, analysis and interpretation of scientific studies of medication adherence.

A systematic review of barriers to medication adherence in the elderly: looking beyond cost and regimen complexity

BACKGROUND

Medication nonadherence is a common problem among the elderly.

OBJECTIVE

To conduct a systematic review of the published literature describing potential nonfinancial barriers to medication adherence among the elderly.

METHODS

The PubMed and PsychINFO databases were searched for articles published in English between January 1998 and January 2010 that (1) described "predictors," "facilitators," or "determinants" of medication adherence or that (2) examined the "relationship" between a specific barrier and adherence for elderly patients (ie, ≥65 years of age) in the United States. A manual search of the reference lists of identified articles and the authors' files and recent review articles was conducted. The search included articles that (1) reviewed specific barriers to medication adherence and did not solely describe nonmodifiable predictors of adherence (eg, demographics, marital status), (2) were not interventions designed to address adherence, (3) defined adherence or compliance and specified its method of measurement, and (4) involved US participants only. Nonsystematic reviews were excluded, as were studies that focused specifically on people who were homeless or substance abusers, or patients with psychotic disorders, tuberculosis, or HIV infection, because of the unique circumstances that surround medication adherence for each of these populations.

RESULTS

Nine studies met inclusion criteria for this review. Four studies used pharmacy records or claims data to assess adherence, 2 studies used pill count or electronic monitoring, and 3 studies used other methods to assess adherence. Substantial heterogeneity existed among the populations studied as well as among the measures of adherence, barriers addressed, and significant findings. Some potential barriers (ie, factors associated with nonadherence) were identified from the studies, including patient-related factors such as disease-related knowledge, health literacy, and cognitive function; drug-related factors such as adverse effects and polypharmacy; and other factors including the patient-provider relationship and various logistical barriers to obtaining medications. None of the reviewed studies examined primary nonadherence or nonpersistence.

CONCLUSION

Medication nonadherence in the elderly is not well described in the literature, despite being a major cause of morbidity, and thus it is difficult to draw a systematic conclusion on potential barriers based on the current literature. Future research should focus on standardizing medication adherence measurements among the elderly to gain a better understanding of this important issue.

Antibiotics nonadherence and knowledge in a community with the world's leading prevalence of antibiotics resistance: implications for public health intervention

Background

Community determinants of antibiotics nonadherence, an important contributor of antibiotics resistance, remained unclear.

Objectives

Our objective was to investigate whether deficient antibiotics knowledge could contribute to nonadherence in a community with high prevalence of antibiotics resistance.

Methods

We recruited 465 people by random sampling from 5 urban areas in Hong Kong. A structured questionnaire was used to assess antibiotics knowledge and adherence. Adherence was defined as completing the most recent course of antibiotics entirely according to physicians’ instructions. An antibiotics knowledge score ranging from 0 to 3 (highest) was composed based on the number of correctly answered questions.

Results

Of the 465 participants interviewed, 96.3% had heard of the term “antibiotics,” and 80.6% recalled having previously received antibiotics prescription. Among the eligible 369 subjects, 32.9% showed nonadherence. Percentages of participants with antibiotics knowledge scores of 0, 1, 2, and 3 were 11%, 27%, 33%, and 29%, respectively. There was a higher prevalence of nonadherence among people with lower antibiotics knowledge score (P < .001). Furthermore, people with nonadherence had a significantly lower mean antibiotics knowledge score (1.3 ± 1.0 versus 2.0 ± 0.9, P < .001), with no interaction with education (P < .05). Adjusted for potential confounders, antibiotics knowledge scores of 2, 1, and 0 independently predicted increased risk of nonadherence by 1-fold (odds ratio [OR], 2.00; 95% confidence interval [CI]: 1.01-3.94; P = .047), 4-fold (OR, 4.77; 95% CI: 2.30-9.92; P < .001), and 17-fold (OR, 18.41; 95% CI: 6.92-48.97; P < .001) respectively, compared with the maximum score of 3.

Conclusion

Lack of antibiotics knowledge is a critical determinant of nonadherence independent of education in the community.

Does increased sunlight exposure work as a strategy to improve vitamin D status in the elderly: a cluster randomised controlled trial

SUMMARY

Sunlight exposure by improving vitamin D status could be a simple public health strategy in reducing falls among frail elder people. In a randomised controlled trial, adherence to sunlight exposure was low (median adherence, 26%) and no effect of increased UV exposure on falls risk was observed (incidence rate ratio (IRR) 1.06, P = 0.73).

INTRODUCTION

This study aimed to determine whether increased sunlight exposure was effective to improve vitamin D status and reduce falls in the elderly.

METHODS

In a cluster randomised controlled trial (NCT00322166 at ClinicalTrials.gov), 602 residents aged 70 or more (mean age, 86.4 years; 71% female) were recruited from 51 aged care facilities in Northern Sydney, Australia. Participants were randomised by facility to receive either increased sunlight exposure (additional 30-40 min/day in the early morning) with (UV+) or without (UV) calcium supplementation (600 mg/day) or neither (control) for a year. The co-primary endpoints were change in serum 25 hydroxy vitamin D (25OHD) and falls incidence after 12 months.

RESULTS

Adherence to sunlight exposure was low (median adherence, 26%; IQR, 7%-45%). Serum 25OHD levels were low at baseline (median, 32.9 nmol/L) and increased only slightly depending on the number of sunlight sessions attended over 12 months (P = 0.04). During the study, 327 falls occurred in 111 (54%) subjects in the control group, 326 falls in 111 (58%) subjects in the UV only group and 335 falls in 108 (52%) subjects in the UV+ group. By intention-to-treat analysis, there was no significant effect of increased UV exposure on falls risk (IRR, 1.06; 95% CI, 0.76-1.48; P = 0.73). However, in 66 participants who attended ≥130 sessions per year (adherence, ≥50% of 260 sessions-five per week), falls were significantly reduced (IRR, 0.52; 95% CI, 0.31-0.88; P = 0.01) compared with the control group.

CONCLUSIONS

Increased sunlight exposure did not reduce vitamin D deficiency or falls risk in frail older people. This public health strategy was not effective most likely due to poor adherence to the intervention.

Medication adherence among geriatric outpatients prescribed multiple medications

BACKGROUND

Poor medication adherence (PMA) is associated with higher risks of morbidity, hospitalization, and mortality. Polypharmacy is not only a determinant of PMA but is also associated with many adverse health outcomes.

OBJECTIVE

We aimed to determine the prevalence and correlates of PMA in an older population with polypharmacy.

METHODS

Baseline data from 193 older adults from the Medication Safety Review Clinic Taiwan Study were analyzed. Patients were either prescribed ≥8 long-term medications or visited ≥3 different physicians between August and October 2007. PMA was defined as taking either <80% or >120% of prescribed amounts of a medication. Patients were classified as no (0%), low level (>0 but <25%), and high level (≥25%) PMA depending on what percentage of entire medication regimen taken reached PMA.

RESULTS

Mean (SD) age was 76 (6) years, and mean number of medications was 9 (3), with a mean medication class number of 4 (1). Of the 1713 medications reviewed, 19% had PMA. However, at patient level, 34%, 32%, and 34% of patients were classified as no, low level, and high level PMA, respectively. Correlates varied by levels of PMA. Compared with patients without PMA, higher medication class number and use of alimentary tract, psychotropic, and hematologic agents were associated with both low and high level PMA. History of dizziness was associated with low level PMA, and higher Mini Mental Status Examination score was associated with high level PMA.

CONCLUSIONS

To enhance medication adherence in older adults prescribed multiple medications, medication class numbers and certain high-risk medication classes should be taken into account. Physicians should also routinely assess systemic (eg, cognition) or drug-specific characteristics (eg, side effects).

Let's talk about medication: concordance in rating medication adherence among multimorbid patients and their general practitioners

BACKGROUND

Medication adherence can be essential for improving health outcomes. Patients with multiple chronic conditions, often receiving multiple medications, are at higher risk for medication nonadherence. Previous research has focused on concordance between patients and providers about which medication should be taken. However, the question of whether patients and providers are concordant in rating actual medication intake has not been answered as yet. This study aimed to explore the extent and predictors of patient - provider concordance in rating medication adherence in patients with multiple chronic conditions.

METHODS

Overall medication adherence was measured by self-report (Medication Adherence Report Scale, MARS-D) in a sample of 92 patients with multiple chronic conditions. Twelve treating primary care physicians were asked to rate medication adherence in these patients using a mirrored version of the MARS-D. Concordance between external rating and self-reported medication adherence was analyzed descriptively. Predictors of concordance in rating medication adherence were explored in a multilevel analysis.

RESULTS

Patients rate their medication adherence markedly higher than their general practitioner. Accordingly, the percentage of concordance ranges between 40% (forgot to take medication) and 61% (deliberately omitted a dose). In multilevel analysis, concordance in rating medication adherence was positively associated with being the single primary care provider (β 2.24, P < 0.0001) and frequent questioning about medication use (β 0.66, P = 0.0031). At the patient level, "not [being] married" (β -0.81, P = 0.0064) and "number of prescribed medications" (β -0.10, P = 0.0203) were negative predictors of patient - provider concordance in rating medication adherence.

CONCLUSION

Concordance for rating medication adherence between general practitioners and their patients was low. Talking about medication on a regular basis and better continuity of care may enhance patient - provider concordance in rating medication adherence as a prerequisite for shared decisions concerning medication in patients with multiple chronic conditions.

Toward identifying the causes and combinations of causes increasing the risks of nonadherence to medical regimens: combined results of two German self-report surveys

OBJECTIVES

This study aimed to identify the causes of the nonadherence (NA) of German patients to their prescribed medication. In the course of the investigation, the NA risk profiles resulting from the combination of the various causes were identified.

METHODS

Two cross-sectional surveys with a total of 1517 patients (comprising 1177 patients contacted by telephone and forming survey 1 and a different set of 340 patients interviewed in-depth and face-to-face forming survey 2) were conducted. Self-reported NA was measured by the generic Morisky Medication Adherence Scale (MMAS). Survey 1 used a four-item MMAS and Survey 2 an eight-item MMAS.

RESULTS

Approximately 35% to 40% of the patients can be described as nonadherent. In survey 1, a few causes explain the NA (chronic disease, younger age, and fewer medications required to be taken). The more detailed survey 2 shows that the existence of intentional NA has considerably more influence than any other causal factors. Positive medication beliefs, a positive mood, and a good patient-doctor relationship reduce the NA risk. Furthermore, patients who are easily able to recognize the correct medication, as evidenced by ability to correctly identify the packaging, have a reduced NA probability. Concerning additive risk, patients who are chronically ill but display no other causes of risk have an NA probability of 10.4%. By contrast, in patients displaying all the identified causes of risk, the rate increases to 93.9%.

CONCLUSIONS

About one-third of patients can be classified as nonadherent. Intentional/medication-based NA causal factors explain the NA considerably better than do socioeconomics. The existence of more than one cause of risk considerably increases the NA risk of a patient.

A look into the future: improving diabetes care by 2015

Insulin initiation, which was traditionally the province of specialists, is increasingly undertaken by primary care. However, significant barriers to appropriate and timely initiation still exist. Whilst insulin is recognized as providing the most effective treatment in type 2 diabetes, it is also widely considered to be the most challenging and time consuming. This editorial identifies that the organization of existing healthcare services, the challenges faced by patients, and the treatments themselves contribute to suboptimal insulin management. In order to improve future diabetes care, it will be necessary to address all three problem areas: (1) re-think the best use of existing human and financial resources to promote and support patient self-management and adherence to treatment; (2) empower patients to participate more actively in treatment decision making; and (3) improve acceptance, persistence and adherence to therapy by continuing to refine insulin therapy and treatment regimens in terms of safety, simplicity and convenience. The principles discussed are also applicable to the successful management of any chronic medical illness.

Perceptions of social capital and cost-related non-adherence to medication among the elderly

The aim of this study was to examine the association between social capital and cost-related non-adherence (CRN) in an elderly population, using data from 1,134 respondents to the Greater Metropolitan Belo Horizonte Health Survey. CRN was lower for those elderly with a better perception of attachment to their neighbourhoods (PR = 0.68; 95%CI: 0.50-0.94), with more social contacts (one to five, PR = 0.49; 95%CI: 0.30-0.80 and more than five, PR = 0.42; 95%CI: 0.26-0.67), and with private health insurance coverage (PR = 0.64; 95%CI: 0.45-0.93). Meanwhile, CRN was significantly higher for those with fair to poor self-rated health (PR =1.66; 95%CI: 0.95-2.90 and PR = 2.62; 95%CI: 1.46-4.71 respectively), with multiple comorbidities (two, PR = 3.45; 95%CI: 1.38-8.62 and three or more, PR = 4.42; 95%CI: 1.74-11.25), and with a lower frequency of physician-patient dialogue about health/treatment (rarely/never, PR = 1.91; 95%CI: 1.16-3.13). These findings highlight the need to take into account the social context in future research on CRN.

Pharmacotherapy at the end-of-life

Older people reaching end-of-life status are particularly at risk from inter-related adverse effects of pharmacotherapy, including polypharmacy, inappropriate medications and adverse drug events. These adverse effects of pharmacotherapy may be highly detrimental, as well as highly expensive. End-of-life pharmacotherapy is sometimes perceived to be complex and challenging, probably unnecessarily. This relates in part to the poorly developed evidence base and lack of high-quality research in this area. In this article, we deal with some of the key issues relating to pharmacotherapy in end-of-life patients, namely (i) the guiding principles of drug selection, (ii) the main drugs and drug classes that are best avoided, (iii) the benefits of 'oligopharmacy' (i.e. deliberate avoidance of polypharmacy) in end-of-life patients.

Regimen complexity and prescription adherence in dialysis patients

OBJECTIVES

Poor medication adherence is common in end-stage renal disease and may cause suboptimal outcomes and increased healthcare costs. We assessed the association between regimen complexity, perceived burden of oral therapy (BOT) and medication adherence in a large sample of hemodialysis (HD) patients.

METHODS

1,238 HD patients in 54 Italian centers participated. Data were collected on patients' socio-demographic characteristics, perceived BOT, quality of life, healthcare satisfaction, social support and medication adherence with a self-administered questionnaire. Data on medication regimen, comorbidities, hospitalizations, and transplant listing status were provided by the nursing staff. We estimated the adjusted association of regimen complexity, BOT and medication adherence with logistic regression.

RESULTS

There were 789 (64%) men and the median age was 67 years. Mean daily burden was 9.7 tablets and 48% of patients were adherent to medication prescriptions. The number of tablets prescribed in the medication regimen was associated to adherence likelihood after adjustment for possible confounders. Perceived BOT moderated the association between tablet count and self-reported adherence.

CONCLUSION

Poor adherence was very common in our sample. Reducing tablet burden might help patients be adherent. However, our results suggest that modulating regimen complexity might be ineffective if patients' negative attitudes toward medications are not addressed concurrently.

Factors associated with medication adherence in patients with chronic obstructive pulmonary disease

BACKGROUND

Predictors of medication adherence are not well known in chronic obstructive pulmonary disease (COPD). It is therefore necessary to identify factors associated with adherence to improve the effectiveness of COPD management within real-world situations.

OBJECTIVES

The goals of this study were to estimate adherence to respiratory medication and to identify factors related to adherence in COPD patients.

METHODS

This was an observational, cross-sectional study conducted on a sample of COPD outpatients. The following information was obtained: adherence to respiratory therapy (Morisky Medication Adherence Scale), age, gender, smoking status, COPD severity [Global Initiative for Chronic Obstructive Lung Disease (GOLD) stage], lung function [post-bronchodilator forced expiratory volume in 1 s (FEV(1))], treatment regimen for COPD, COPD medication costs per month paid by the patient and health-related quality of life (EuroQol 5-dimension questionnaire). A multivariate logistic regression analysis was performed to identify the independent predictors of adherence.

RESULTS

Of the 170 participants (mean age 63.8 years, 41.8% male), 58.2% reported optimal adherence. Adherence to respiratory therapy was associated with age, current smoking status, number of respiratory drugs, number of daily respiratory drug doses and quality of life (p < 0.005). Adherence to respiratory therapy was not related to gender, GOLD stage, FEV(1) or COPD medication costs.

CONCLUSIONS

Adherence to COPD medication regimens is poor. Less frequent dosing regimens could be an effective method to enhance adherence to respiratory therapy. Quality-of-life monitoring within clinical practice settings could facilitate improved medication adherence.

Overcoming problems with adherence to osteoporosis medication

Nonadherence to pharmacological treatment in osteoporosis is a well-recognized problem. As in other chronic diseases, adherence to osteoporosis treatment is poor, resulting in enormous burden on patients and healthcare resources. Most importantly, low adherence rates consistently result in increased rates of fractures. However, it seems that efforts to evaluate and improve rates of both compliance and persistence are increasing. The extension of dosing intervals may be an element, among others, allowing improvements in therapeutic adherence. Improved patient education, enhancing healthcare provider-patients interaction, taking into account patient's preferences and involving them in treatment decisions may improve adherence.

Medication beliefs predict medication adherence in older adults with multiple illnesses

OBJECTIVE

To examine factors preventing medication nonadherence in community-dwelling older adults with multiple illnesses (multimorbidity). Nonadherence threatens successful treatment of multimorbidity. Adherence problems can be intentional (e.g., deliberately choosing not to take medicines or to change medication dosage) or unintentional (e.g., forgetting to take medication) and might depend on a range of factors. This study focused in particular on the role of changes in beliefs about medication to explain changes in adherence.

METHODS

Longitudinal study with N = 309 individuals aged 65-85 years with two or more diseases at three measurement points over six months. Medication adherence and beliefs about medicines were assessed by questionnaire. Hierarchical weighted least squares regression analyses were used to predict individual intentional and unintentional nonadherence.

RESULTS

Changes in intentional nonadherence were predicted by changes in specific necessity beliefs (B = -.19, P<.01), after controlling for sociodemographic factors, health status and number of prescribed medicines. Changes in unintentional nonadherence were predicted by changes in general overuse beliefs (B = .26, P<.01), controlling for the same covariates.

CONCLUSION

Beliefs about medication affect both intentional and unintentional adherence to medication in multimorbid older adults. This points to the importance of addressing medication beliefs in patient education to improve adherence.

Relationships between repeated instruction on inhalation therapy, medication adherence, and health status in chronic obstructive pulmonary disease

Purpose

Adherence to inhalation therapy is a critical determinant of the success of chronic obstructive pulmonary disease (COPD) management. However, in practice, nonadherence to inhalation therapy is very common in COPD patients. The effects of adherence to inhalation therapy in COPD have not been fully studied, and less is known about the relationship between medication adherence and quality of life in COPD. Our aim is to assess the factors that contribute to adherence to inhalation therapy and examine their correlation with quality of life.

Patients and methods

A cross-sectional analysis of 88 COPD patients was performed using a self-reported adherence questionnaire with responses on a 5-point Likert scale.

Results

Of the 88 patients who were potential participants, 55 (63%) responded with usable information. The only significant factor associated with the overall mean adherence score was receiving repeated instruction about inhalation techniques (P = 0.032). Of the 55 respondents, 22 (40.0%) were given repeated verbal instruction and/or demonstrations of inhalation technique by a respiratory physician. Significant correlations were found between the overall mean adherence score and the health-related quality of life score (St George’s Respiratory Questionnaire: total, r = −0.35, P = 0.023; symptoms, r = −0.43, P = 0.002; impacts, r = −0.35, P = 0.011). Furthermore, patients with repeated instruction showed better quality of life scores than those who did not receive instruction (total, P = 0.030; symptoms, P = 0.038; impacts, P = 0.019).

Conclusions

Repeated instruction for inhalation techniques may contribute to adherence to therapeutic regimens, which relates to better health status in COPD.

Socio-demographic and clinical factors influencing the adherence to treatment in Parkinson's disease: the ADHESON study

BACKGROUND

Symptoms of Parkinson's disease (PD) are usually controlled by a continuous titration of medication and addition of multiple therapies over the course of the disease. Therapeutic complex schemes, polymedication, comorbidities and the number of medications required contribute to non-adherence.

METHODS

This cross-sectional survey was performed in 418 patients with PD on treatment with any antiparkinsonian medication. Patient adherence was assessed through physicians' subjective perception and the Morisky-Green test (MGT). Several social, demographic and clinical features were correlated through bivariate and multivariate analyses.

RESULTS

According to the physician's opinion 93.7%, and according to the MGT 60.4% of patients were adherent to parkinsonian therapy. The bivariate analysis showed greater adherence in patients with a high level of knowledge about the disease (62.8%), good clinical control (63.6%), a spouse or life partner (63%) and higher incomes (66%). Negative correlation with psychiatric symptoms was found. In relation to the MGT, the logistic regression model showed a negative correlation between cognitive deterioration and psychiatric pathology and adherence to therapy.

CONCLUSIONS

The physician's impression overestimated the compliance of patients when compared with an objective evaluation such as the MGT. Cognitive impairment and psychiatric symptoms are the clinical variables associated with a lower level of adherence.

Inverting compliance, increasing concerns: aging, mental health, and caring for a trustful patient

Why, after 40 years of intensive research, is adherence to treatment still an issue? This paper suggests a possible solution to an apparently unsolvable problem: reconceptualizing adherence. To understand how adherence can affect key personnel in any western health system, this study focuses on community nurses working with older mental health patients in Quebec. When they spoke about adherence, nurses presented an idealized image of the nurse-patient relationship, namely, the caring nurse and the trustful patient. However, this idealization cannot be reduced only to questions of power and paternalism. By reconceptualizing adherence as a 'matter of concern', health professionals and researchers alike might come to understand individual care situations within a broader notion of conflicts in patient care.

'Not the full Monty': a qualitative study of seniors' perceptions of generic medicines in Western Australia

The study explored consumers' perspectives on generic medicine use in Australia. A qualitative methodology was used to explore the topic, including community participation in the form of forums, focus groups and a panel of seniors. Three consumer forums were held from which a seniors' panel was formed and a series of focus groups were conducted. Participants demonstrated considerable mistrust of generic medicines. Participants highlighted their uncertainty about the extent of pharmaceutical companies' influence on health professionals, the mistrust of foreign generic manufacturers and scepticism in their equivalence. In addition, the substitution of generic medicines and variability in packaging added to the overall concern and reported poor compliance. Altering consumers' beliefs and attitudes about generic medicines might require a more concerted effort to reduce consumer mistrust. Consumers' beliefs about generic medicines will strongly affect attempts to increase generic prescribing in Australia. Many seniors require multiple medications for a range of chronic conditions. Currently however, the lack of uniformity in information and packaging implies that closer monitoring, greater clarity of information and improved packaging of generic medicines is required. Otherwise, the widespread problems and lower uptake of generic medicines amongst seniors will remain.

Assessing patient adherence to chronic diseases treatment: differentiating between epidemiological and clinical approaches

This review discusses the concepts and methods for assessing patient adherence to treatment, as applied to both epidemiological and clinical approaches within real health care practices. For the epidemiological approach, the assessment must be as accurate as possible. Self-reported questionnaires are the most feasible option in most circumstances, but most demonstrate low sensitivity combined with high specificity. We suggest that self-reported outcomes, where feasible, can increase the sensitivity for non-adherence of these questionnaires. In the clinical approach an accurate distinction between adherents and non-adherents is less useful. For the health provider, it is more important to be aware of the particular situation that each patient is currently experiencing with his/her treatment. Self-reported questionnaires applied in clinical settings can help the health provider to form an objective opinion. In any event, the patient-provider dialogue is still the best approach to assess patient adherence as well as to deliver good care.

Geriatric drug therapy: neglecting the inevitable majority

Demographic evolution will considerably increase the number of people aged 65 years and beyond in the coming decades. The elderly not only represent the most heterogeneous population, but also are a major user group for prescribed medicines, a predominance that will continue to further increase. Medicines and medication management are much more complex and challenging in the elderly and can only be addressed through a multidisciplinary approach. There is strong evidence that the elderly are able to properly manage their medication; however, their medications require different features than the standard medications used by adults. The elderly are exposed to several chronic disease conditions and their treatments, as well as experience age-related changes and limitations that need to be reflected in their medication management strategies. Geriatric drug therapy remains a multidisciplinary task. The health care industry, physicians, pharmacists, nurses and care givers provide and guide the patient's therapy according to individual needs, while the health care system and regulatory authorities build the necessary framework of support and resources.Any realistic and significant enhancement to the elderly patients' medicines and medication management needs to be addressed by all disciplines and stakeholders involved since the absence of any of the stakeholders in the overall process negatively impacts the achievable enhancement in geriatric drug therapy.

Use of multicompartment compliance aids for elderly patients: patient viewpoints and hospital length of stay

AIM

To explore elderly (aged > or = 75 years) patients' views regarding the use of multicompartment compliance aids (MCAs) and determine whether MCAs would prolong their length of hospital stay.

METHODS

A cross-sectional, prospective study in 3 acute geriatric wards in a district general hospital in the United Kingdom. Patients admitted to the hospital who were found to be users of MCAs were interviewed about their perception of MCAs, and their length of hospital stay was monitored.

RESULTS

A total of 1080 older patients were admitted over a 3-month period. Only 51 (4.7%) patients were users of MCAs and constituted the study group. The majority (51%) of MCAs were requested by general practitioners. Eight (16%) patients were asked whether they wished to use the MCAs and 3 (6%) had formal assessment prior to MCA start. On the patients' survey, 18 (35%) patients did not prefer the MCA if they were given the choice. This group of patients had better cognitive function assessed by the Mini-Mental State Examination (24.4 [3.6] vs 21.8 [3.6]; P = 0.02) and were less dependent on social services (39% vs 67%; P = 0.04) in comparison with patients who did prefer the MCA. They expressed a greater lack of autonomy (94% vs 52%; P = 0.002) and decision making (78% vs 49%; P = 0.04). They tended to be more informed about their medications' names (44% vs 6%; P = 0.01), indications (28% vs 9%; P = 0.02), and self-administration of medications (89% vs 39%; P = 0.01). Multicompartment compliance aids resulted in delayed discharges of 40 (78%) patients, with a mean of 1.3 days (standard deviation, 0.9 days; range, 0-3 days per patient) and a total of 65 days.

CONCLUSION

The use of MCAs resulted in a lack of autonomy and decision making in older patients and a significant delay of discharges, thereby increasing hospital costs.

Polypharmacy in older adults with cancer

The definition of "polypharmacy" ranges from the use of a large number of medications; the use of potentially inappropriate medications, which can increase the risk for adverse drug events; medication underuse despite instructions to the contrary; and medication duplication. Older adults are particularly at risk because they often present with several medical conditions requiring pharmacotherapy. Cancer-related therapy adds to this risk in older adults, but few studies have been conducted in this patient population. In this review, we outline the adverse outcomes associated with polypharmacy and present polypharmacy definitions offered by the geriatrics literature. We also examine the strengths and weaknesses of these definitions and explore the relationships among these definitions and what is known about the prevalence and impact of polypharmacy.

Determinants of medication adherence in hypertensive patients: an application of self-efficacy and the Theory of Planned Behaviour

Objective

The study aimed to identify the determinants of medication adherence in a population of hypertensive outpatients. The principle objective of the present study was to determine the utility of self-efficacy and the Theory of Planned Behaviour (TPB) in predicting adherence with antihypertensive medication.

Setting

An outpatient hypertension clinic at the Belfast City Hospital, Northern Ireland.

Method

Outpatients who had attended the hypertension clinic on at least one previous occasion were invited to participate in the study. Participants completed a questionnaire incorporating measures of adherence with medication, medical and sociodemographic factors, together with measures of self-efficacy and the TPB. There were no specific study exclusion criteria.

Key findings

A total of 139 participants took part in the study; 20.9% of the participants reported non-adherence with their prescribed antihypertensive medication. A statistically significant difference in self-efficacy scores between the adherent and non-adherent groups was revealed by a Mann-Whitney test, with adherent patients perceiving higher levels of self-efficacy. Regression analysis with the TPB variables revealed that adherence was predicted by intentions and subjective norms, with 41% of the variance explained. Intention was predicted by attitudes and perceived behavioural control, with 61.9% of the variance explained.

Conclusion

The present study provides support for the use of self-efficacy and the TPB in predicting medication adherence; however, further research is required on the application of the TBP in the prediction of health behaviour. These findings have implications for the design of adherence-enhancing interventions.

Estudo de base populacional da subutilização de medicamentos por motivos financeiros entre idosos na Região Metropolitana de Belo Horizonte, Minas Gerais, Brasil

O objetivo deste trabalho foi estimar a prevalência e avaliar os fatores associados à subutilização de medicamentos por motivos financeiros em amostra representativa de 1.134 idosos, residentes na Região Metropolitana de Belo Horizonte, Minas Gerais, Brasil. A prevalência da subutilização foi de 12,9%, estando independentemente associada à renda pessoal mensal inferior a dois salários mínimos (RP = 0,57; IC95%: 0,34-0,97), à filiação a plano privado de saúde (RP = 0,68; IC95%: 0,46-0,99), à freqüência com que o profissional de saúde esclareceu sobre a saúde/tratamento (raramente/nunca, RP = 1,79; IC95%: 1,10-2,90), à auto-avaliação de saúde (razoável, RP = 1,66; IC95%: 0,95-2,90 e ruim/muito ruim, RP = 2,49; IC95%: 1,38-4,48) e ao número de condições crônicas (uma, RP = 2,51; IC95%: 0,99-6,35; duas, RP = 3,51; IC95%: 1,40-8,72 e três ou mais, RP = 4,52; IC95%: 1,79-11,41). Os resultados confirmam a importância dos aspectos sócio-econômicos para a subutilização, mas indicam que sua determinação também está ligada à qualidade da comunicação médico-paciente. Evidencia-se ainda uma situação de risco para idosos em piores condições de saúde.

Older people and adherence with medication: a review of the literature

BACKGROUND

Older people represent a sizeable population of the UK. Many older people receive drug treatment for long-term conditions. Adherence with medication is therefore an important clinical, financial and resource intensive concern.

OBJECTIVES

This review aimed to examine patient's beliefs, perceptions and views in relation to adherence with medication.

DESIGN

A comprehensive search of the literature was undertaken using numerous approaches. The search of revealed 30 research papers.

FINDINGS

Articles were initially evaluated using Critical Appraisal Skills Programme principles to identify those relevant to the review. Relevant studies were then subjected to a narrative analysis to assist the development of relevant themes. Four themes were identified; experience of adherence; perceptions and attitudes to medication adherence and non-adherence; patients acceptance of their illness and impact on medication taking behaviour and shared decision making.

CONCLUSIONS

The findings of this review imply that there is a need for more emphasis on shared decision making between the older patient and the prescriber. Using this approach, adherence with medication may improve. There is also a need to develop a standardized measure of medication adherence.

Exploring the impact of depressive symptoms and medication beliefs on medication adherence in hypertension--a primary care study

OBJECTIVE

This study aimed to assess the levels of adherence in a sample of hypertensive patients being cared for in primary care in Northern Ireland and to explore the impact of depressive symptoms and medication beliefs on medication adherence.

METHODS

The study was conducted in 97 community pharmacies across Northern Ireland. A questionnaire containing measures of medication adherence, depressive symptoms and beliefs about medicines was completed by 327 patients receiving antihypertensive medications.

RESULTS

Analysis found that 9.3% of participants were non-adherent with their antihypertensive medication (self-report adherence scale) and 37.9% had scores indicative of depressive symptoms as determined by the Center for Epidemiological Studies Depression Scale (CES-D). In the univariate analysis, concerns about medications had negative effects on both adherence and depressive symptomatology. However, logistic regression analysis revealed that patients over the age of 50 were more likely to be adherent with their medication than those younger than 50. Depressive symptomatology and medication beliefs (concerns) were not significantly related to adherence in the regression analysis.

CONCLUSION

Depressive symptomatology was high in the sample as measured by the CES-D. Age was the only significant predictor of medication adherence in this population.

PRACTICE IMPLICATIONS

Health care professionals should consider the beliefs of the patient about their hypertensive medications and counsel younger patients on adherence.