Reliability and validity of the self-efficacy and outcome expectations for osteoporosis medication adherence scales

Measurement Properties of Existing Patient-Reported Outcome Measures on Medication Adherence: Systematic Review

BACKGROUND

Medication adherence is essential for improving the health outcomes of patients. Various patient-reported outcome measures (PROMs) have been developed to measure medication adherence in patients. However, no study has summarized the psychometric properties of these PROMs to guide selection for use in clinical practice or research.

OBJECTIVE

This study aims to evaluate the quality of the PROMs used to measure medication adherence.

METHODS

This study was guided by the PRISMA (Preferred Reporting Items for Systematic Review and Meta-Analysis) guidelines. Relevant articles were retrieved from the EMBASE, PubMed, Cochrane Library, Web of Science, and CINAHL (Cumulative Index to Nursing and Allied Health Literature) databases. The PROMs were then evaluated based on the COnsensus-based Standards for the selection of health Measurement Instruments (COSMIN) guidelines.

RESULTS

A total of 121 unique medication adherence PROMs from 214 studies were identified. Hypotheses testing for construct validity and internal consistency were the most frequently assessed measurement properties. PROMs with at least a moderate level of evidence for ≥5 measurement properties include the Adherence Starts with Knowledge 20, Compliance Questionnaire-Rheumatology, General Medication Adherence Scale, Hill-Bone Scale, Immunosuppressant Therapy Barrier Scale, Medication Adherence Reasons Scale (MAR-Scale) revised, 5-item Medication Adherence Rating Scale (MARS-5), 9-item MARS (MARS-9), 4-item Morisky Medication Adherence Scale (MMAS-4), 8-item MMAS (MMAS-8), Self-efficacy for Appropriate Medication Adherence Scale, Satisfaction with Iron Chelation Therapy, Test of Adherence to Inhalers, and questionnaire by Voils. The MAR-Scale revised, MMAS-4, and MMAS-8 have been administered electronically.

CONCLUSIONS

This study identified 121 PROMs for medication adherence and provided synthesized evidence for the measurement properties of these PROMs. The findings from this study may assist clinicians and researchers in selecting suitable PROMs to assess medication adherence.

Development of an Item Bank to Measure Medication Adherence: Systematic Review

Background

Medication adherence is important in managing the progression of chronic diseases. A promising approach to reduce cognitive burden when measuring medication adherence lies in the use of computer‐adaptive tests (CATs) or in the development of shorter patient-reported outcome measures (PROMs). However, the lack of an item bank currently hampers this progress.

Objective

We aim to develop an item bank to measure general medication adherence.

Methods

Using the preferred reporting items for systematic review and meta-analysis (PRISMA), articles published before October 2019 were retrieved from PubMed, Embase, CINAHL, the Cochrane Library, and Web of Science. Items from existing PROMs were classified and selected (“binned” and “winnowed”) according to standards published by the Patient-Reported Outcomes Measurement Information System (PROMIS) Cooperative Group.

Results

A total of 126 unique PROMs were identified from 213 studies in 48 countries. Items from the literature review (47 PROMs with 579 items for which permission has been obtained) underwent binning and winnowing. This resulted in 421 candidate items (77 extent of adherence and 344 reasons for adherence).

Conclusions

We developed an item bank for measuring general medication adherence using items from validated PROMs. This will allow researchers to create new PROMs from selected items and provide the foundation to develop CATs.

Is patient empowerment the key to promote adherence? A systematic review of the relationship between self-efficacy, health locus of control and medication adherence

Background

Current health policies emphasize the need for an equitable doctor-patient relationship, and this requires a certain level of patient empowerment. However, a systematic review of the empirical evidence on how empowerment affects medication adherence—the extent to which patients follow the physician’s prescription of medication intake—is still missing. The goal of this systematic review is to sum up current state-of-the-art knowledge concerning the relationship between patient empowerment and medication adherence across medical conditions. As our conceptualization defines health locus of control and self-efficacy as being crucial components of empowerment, we explored the relationship between these two constructs and medication adherence.

Methods

Relevant studies were retrieved through a comprehensive search of Medline and PsychINFO databases (1967 to 2017). In total, 4903 publications were identified. After applying inclusion and exclusion criteria and quality assessment, 154 articles were deemed relevant. Peer-reviewed articles, written in English, addressing the relationship between empowerment (predictor) and medication adherence (outcome) were included.

Findings

High levels of self-efficacy and Internal Health Locus of Control are consistently found to promote medication adherence. External control dimensions were found to have mainly negative (Chance and God attributed control beliefs) or ambiguous (Powerful others attributed control beliefs) links to adherence, except for Doctor Health Locus of Control which had a positive association with medication adherence. To fully capture how health locus of control dimensions influence medication adherence, the interaction between the sub-dimensions and the attitudinal symmetry between the doctor and patient, regarding the patient’s control over the disease management, can provide promising new alternatives.

Discussion

The beneficial effect of patients’ high internal and concurrent physician-attributed control beliefs suggests that a so-called “joint empowerment” approach can be suitable in order to foster medication adherence, enabling us to address the question of control as a versatile component in the doctor-patient relationship.

Medication persistence in older women with osteoporosis: a pilot study

Most osteoporosis patients stop their medications before they should. Side effects are the most common reason patients in this sample stopped their medication before they told their physician. Physicians should use shared decision-making and discuss side effects of osteoporosis medications with their patients and explain the risks of the medications.

INTRODUCTION

The aims of this study were to (a) qualitatively examine reasons for medication non-persistence in osteoporosis, and (b) investigate how medication non-persistence in osteoporosis is associated with outcome expectations, self-efficacy, trust in physicians, and health locus of control.

METHODS

Subjects were recruited from online support groups to answer an anonymous online survey. Subjects were eligible if they (a) were female, (b) were at least 40 years of age, (c) self-identify as having osteoporosis, and (d) have taken at least one medication for osteoporosis. During the survey, subjects completed measures of self-efficacy, outcome expectations, trust in physicians generally, health locus of control, and demographic information.

RESULTS

Thirty-four subjects completed the online survey and had usable data. Approximately 82 % (n = 28) of subjects reported discontinuing an osteoporosis medication without first consulting a physician. The most common reason patients discontinued an osteoporosis medication was adverse effects. Subjects were more likely to discontinue their medications when they had poorer outcome expectations on average (p = 0.01), had lower trust in physicians on average (p < 0.0001), and had more of a doctors-centered locus of control (p = 0.03). Self-efficacy, age, insurance, status, and other measures of locus of control were not associated with medication non-persistence.

CONCLUSIONS

Side effects are a significant concern for women with osteoporosis and may be a cause for medication non-persistence.

Development of a measure of self-efficacy for acute headache medication adherence

Acute medication adherence is essential to manage chronic, episodic disorders, including headache. This paper describes the development of a measure of acute medication self-efficacy for headache (AMSE-H). Phase 1: 14 AMSE-H items were generated through qualitative interviews with 21 patients and 15 clinical headache experts. Phase 2: Researchers selected 7 AMSE-H items by examining item performance in 35 headache patients. Phase 3: Migraine patients (n = 161) completed the AMSE-H, and measures of outcome expectancies, perceived access to medication, headache management self-efficacy (n = 58) and a 1-week AMSE-H re-test (n = 103). Content validity was established through input of multiple stakeholder groups during item generation. PCA identified two components: cross-episode self-efficacy (eigenvalue = 3.4) and Episode-Specific Self-Efficacy (eigenvalue = 1.0). These subscales are internally consistent (.73-.80), have low 1-week test-retest reliability (rs = .52-.66), and demonstrated solid construct and discriminant validity. The AMSE-H is brief, theory-driven, focused, socially valid measure acceptable to both patients and providers.

Reliability and validity of the Chinese versions of self-efficacy and outcome expectations for osteoporosis medication adherence scales in Chinese immigrants

BACKGROUND AND PURPOSE

To assess the psychometric properties of Chinese versions self-efficacy and outcome expectations on osteoporosis medication adherence (SEOMA-C and OEOMA-C) scales.

METHODS

Back-translated tools were assessed by internal consistency and R2 by structured equation modeling, confirmatory factor analyses, hypothesis testing, and criterion-related validity among 110 (81 females, 29 males) Mandarin-speaking immigrants (mean age = 63.44, SD = 9.63).

RESULTS

The Cronbach's alpha for SEOMA-C and OEOMA-C is .904 and .937, respectively. There was fair and good fit of the measurement model to the data. Previous bone mineral density (BMD) testing, calcaneus BMD, self-efficacy for exercise, and osteoporosis medication adherence were positively related to SEOMA-C scores.

CONCLUSION

These scales constitute some preliminary validity and reliability. Further refined and cultural sensitive items could be explored and added.

Patient's Communication Perceived Self-efficacy Scale (PCSS): construction and validation of a new measure in a socio-cognitive perspective

OBJECTIVE

In two studies we constructed and validated the Patient's Communication Perceived Self-efficacy Scale (PCSS) designed to assess patients' beliefs about their capability to successfully manage problematic situations related to communication with doctor.

METHODS

The 20-item scale was administered to 179 outpatients (study 1). An Exploratory Factor Analysis revealed a three-factor solution. In study 2, the 16-item scale was administered to 890 outpatients.

RESULTS

Exploratory and Confirmatory Factor Analyses supported the 3-factor solution (Provide and Collect information, Express concerns and doubts, Verify information) that showed good psychometric properties and was invariant for gender.

CONCLUSION

PCSS is an easily administered, reliable, and valid test of patients' communication self-efficacy beliefs.

PRACTICE IMPLICATIONS

It can be applied optimally in the empirical study of factors influencing doctor-patient communication and used in training aimed at strengthening patients' communication skills.

Adherence with medications used to treat osteoporosis: behavioral insights

Non-persistence (never starting or stopping medication prematurely) and non-compliance (taking medication inappropriately) with fracture prevention medication among those at high risk of fracture remain significant barriers to optimal reduction of osteoporotic fractures. Current research suggest that for patients to persist and comply with prescriptions for fracture prevention medication, they need to believe that they are at significant risk of fracture, that the prescribed medication can safely reduce their risk of fracture without exposing them to long-term harm, that equally effective non-medicinal therapies are not available, and that they can successfully execute medication use in the context of their daily task demands. Further research is needed to understand; a) the mental models of osteoporosis, fractures, and medications used to treat osteoporosis that patients employ when making decisions as to whether or not to take fracture prevention medication; and b) how patients arbitrage information from various sources (health care providers, family, friends, and other sources) to formulate their beliefs about osteoporosis and medications used to treat it.

A theory-based online hip fracture resource center for caregivers: effects on dyads

BACKGROUND

Hip fracture is a serious injury for older adults, usually requiring surgical repair and extensive therapy. Informal caregivers can help older adults make a successful recovery by encouraging them to adhere to the therapy plans and improve their health behaviors. Few resources, however, are available for these caregivers to learn about how to assist their care receivers and cope with their unique caregiving situations.

OBJECTIVE

The study aims were to develop a comprehensive theory-based online hip fracture resource center (OHRC) for caregivers, Caring for Caregivers, and conducted a feasibility trial.

METHODS

The OHRC included self-learning modules, discussion boards, Ask the Experts, and a virtual library. The feasibility of the intervention was assessed by usage and usability. The feasibility of the future trial was tested using a one-group pre-post design on 36 caregiver-care receiver dyads recruited from six hospitals. The caregivers used the OHRC for 8 weeks. The impact of the intervention was assessed on both caregivers (primary) and care receivers (secondary). The data were analyzed by descriptive statistics, paired t tests, and content analyses.

RESULTS

On average, caregivers reviewed five modules and used the discussion board 3.1 times. The mean perceived usability score for the OHRC was 74.04 ± 7.26 (range, 12-84). Exposure to the OHRC significantly improved caregivers' knowledge about the care of hip fracture patients (t = 3.17, p = .004) and eHealth literacy (t = 2.43, p = .002). Changes in other caregiver outcomes (e.g., strain, coping, and social support) and care receiver outcomes (e.g., self-efficacy for exercise and osteoporosis medication adherence) were favorable but not significant.

DISCUSSION

The findings suggest that the OHRC was user-friendly and could be beneficial for caregivers. Additional larger-scale trials are needed to assess the effectiveness of the intervention on outcomes.

Association of medication attitudes with non-persistence and non-compliance with medication to prevent fractures

Our objective was to assess the association of self-reported non-persistence (stopping fracture-prevention medication for more than 1 month) and self-reported non-compliance (missing doses of prescribed medication) with perceived need for fracture-prevention medication, concerns regarding long-term harm from and/or dependence upon medications, and medication-use self-efficacy (confidence in one's ability to successfully take medication in the context of their daily life).

INTRODUCTION

Non-persistence (stopping medication prematurely) and non-compliance (not taking medications at the prescribed times) with oral medications to prevent osteoporotic fractures is widespread and attenuates their fracture reduction benefit.

METHODS

Cross-sectional survey and medical record review of 729 patients at a large multispecialty clinic in the United States prescribed an oral bisphosphonate between January 1, 2006 and March 31, 2007.

RESULTS

Low perceived necessity for fracture-prevention medication was strongly associated with non-persistence independent of other predictors, but not with non-compliance. Concerns about medications were associated with non-persistence, but not with non-compliance. Low medication-use self-efficacy was associated with non-persistence and non-compliance.

CONCLUSIONS

Non-persistence and non-compliance with oral bisphosphonate medication have different, albeit overlapping, sets of predictors. Low perceived necessity of fracture-prevention medication, high concerns about long-term safety of and dependence upon medication , and low medication-use self-efficacy all predict non-persistence with oral bisphosphonates, whereas low medication-use self-efficacy strongly predicts non-compliance with oral bisphosphonate medication. Assessment of and influence of these medication attitudes among patients at high risk of fracture are likely necessary to achieve better persistence and compliance with fracture-prevention therapies.

Measuring patients' self-efficacy in understanding and using prescription medication

OBJECTIVE

To create a brief assessment tool, the Medication Understanding and Use Self-Efficacy Scale (MUSE).

METHODS

An existing scale (Communication and Attitudinal Self-Efficacy Scale) was modified, augmented, and piloted among 267 primary care patients in Chicago, New York City, and Shreveport, LA. Participant sociodemographics, literacy, current medication use, understanding medication instructions, and medication self-efficacy were measured.

RESULTS

Using principal components analysis, two scales emerged: taking medication and learning about medication; these two factors accounted for 55% of the total variance of understanding medication instructions. Performance on the MUSE differed by literacy level; multivariate analysis detected no interaction between literacy level and MUSE score. Regression analysis, adjusted for age, education, literacy level and number of current prescription medications indicated that participants' MUSE scores predicted patient understanding of common medication instructions (beta=0.07, 95% CI 0.001-0.14, p=0.04).

CONCLUSION

The MUSE is a valid and reliable tool measuring self-efficacy of understanding and using prescription medication. This scale differs from existing medication-specific self-efficacy scales as it addresses both learning about one's medications and adherence to the prescribed regimen.

PRACTICE IMPLICATIONS

The MUSE is an effective and brief research tool that can be utilized among participants with varying literacy levels.

Men's experiences of living with osteoporosis: focus group interviews

Osteoporotic fractures in men are an increasing public health problem. Male osteoporosis is often a low-prioritized issue, however. To examine men's experiences with osteoporosis and how they handle osteoporosis in their everyday lives, the authors collected data from four focus groups with a total of 16 men aged 51 to 82 years diagnosed with osteoporosis. Critical psychology was used as a theoretical framework for the data analysis, which aimed to elicit information about the men's daily lives. The men handled osteoporosis in different ways using different strategies. The authors found patterns that resonated with the social construction of hegemonic masculinity as displayed through the men's fear of weakness and endurance through physical activity, as well as identity construction through active decision making in relation to health. Understanding and implementation of these issues is necessary in the development of preventive, screening, and monitoring strategies, as well as in the clinical care of men with osteoporosis.

Pilot testing of the PRAISEDD intervention among African American and low-income older adults

BACKGROUND AND RESEARCH OBJECTIVE

The incidence of cardiovascular disease (CVD) is particularly high among African American (AA) older adults, and these individuals are least likely to have access to CVD prevention activities. The purpose of this study was to test the feasibility of People Reducing Risk and Improving Strength through Exercise, Diet and Drug Adherence (PRAISEDD), which is geared at increasing adherence to CVD prevention behaviors among AA and low-income older adults.

METHODS

This feasibility study was conducted in a senior housing site, using a single-group repeated-measures design and testing physical activity, diet, medication adherence beliefs and behaviors, and blood pressure at baseline and after a 12-week intervention period. Of 22 participants, mean (SD) age was 76.4 (7.6) years, and most were female (64%) and AA (86%). An intention-to-treat analysis was used.

RESULTS

There were significant decreases in systolic (P = .02) and diastolic blood pressure (P = .01) and a nonsignificant trend toward improvement in cholesterol intake (P = .09). There were no changes in time spent in moderate-level physical activity, sodium intake, medication adherence, or self-efficacy and outcome expectations across all 3 behaviors.

CONCLUSION

The PRAISEDD intervention was feasible in a group of AA and low-income older adults and, after 12 weeks, resulted in improvements in blood pressure. Future research is needed to test a revised PRAISEDD intervention using a randomized controlled design, a larger sample, and a longer follow-up period. The PRAISEDD intervention should be revised to incorporate environmental and policy changes that influence CVD prevention behaviors and explore the impact of social networking as it relates to diffusion of the intervention among participants in low-income housing facilities.

Non-compliance: the Achilles' heel of anti-fracture efficacy

About 50% of patients fail to comply or persist with anti-osteoporosis treatment regimens within 1 year. Poor compliance is associated with higher fracture rates. Causes of poor compliance are unknown. As it is not possible to predict poor compliance, close monitoring of compliance is needed. Despite evidence supporting the anti-fracture efficacy of several pharmacological agents, approximately 50% of patients do not follow their prescribed treatment regimen and/or discontinue treatment within 1 year. Poor compliance is associated with higher fracture rates and increased morbidity, mortality and cost. However, as poor compliance, even to placebo, is associated with adverse outcomes, the higher morbidity appears to be only partly the result of lack of treatment: as yet, undefined characteristics place poor compliers at higher risk of morbidity and mortality. Only a small proportion (e.g., 6%) of the variability in compliance is explained by putative causal factors such as older age, co-morbidity or greater number of medications. Regimens with longer dosing intervals, such as weekly dosing, improve compliance, persistence and outcomes, but only modestly. As it is not possible to predict poor compliance, close monitoring of compliance should be an obligatory duty in clinical care. How this is best achieved has yet to be established, but poor persistence occurs as early as 3 months of starting treatment, indicating the need for early monitoring.

Adherence, persistence, concordance: do we provide optimal management to our patients with osteoporosis?

The last two decades have witnessed numerous advances in the treatment of chronic diseases, most notably those occurring in postmenopausal women. An insidious course and minimal symptoms often characterize chronic diseases, with the result that long-term adherence to prescribed treatment regimens may be difficult to obtain. Poor compliance has been abundantly documented, particularly in patients with hypercholesterolemia, hypertension, or diabetes mellitus. Many factors may contribute to poor compliance, including the unobtrusiveness of the symptoms, limited patient awareness of the potential severity of the disease and of the benefits expected from optimal treatment, low level of education, fear of adverse effects from medications, and cost of medications. The effects of these factors vary across countries, in particular according to the characteristics of healthcare systems. Several strategies are being developed to measure compliance and to identify reasons for non-compliance. Attention is turning to methods for improving compliance, some of which rest on general principles and others on the specific characteristics of each disease. Few data are available on compliance with treatments for osteoporosis, since these were introduced only within the last decade. In many studies, the reference standard was hormone replacement therapy (HRT), whose use is decreasing markedly as a result of recent data on adverse effects. Available studies of bisphosphonate therapy indicate a less than 50% continuation rate after 1 year. The few comparative studies published to date have methodological flaws that preclude definitive conclusions. Compliance has been equally poor with all available bisphosphonates. Although statistically significant, the improvements produced by weekly dosing have been modest, about 10%, indicating a need for further compliance-enhancing strategies. Conflicting results were obtained from the few studies addressing the potential of bone turnover marker assays for influencing compliance. Having a nurse inform patients about the disease and the importance of compliance with dosing recommendations holds promise for improving compliance.

What is a health expectation? Developing a pragmatic conceptual model from psychological theory

INTRODUCTION

Examination of the existing literature in respect of health expectations revealed both ambiguity in relation to terminology, and relatively little work in respect of how abstract theories of expectancy in the psychological literature might be used in empirical research into the influence of expectations on attitudes and behaviours in the real world. This paper presents a conceptual model for the development of health expectations with specific reference to Alzheimer's disease.

METHOD

Literature review, synthesis and conceptual model development, illustrated by the case of a person with newly diagnosed, early-stage Alzheimer's disease, and her caregiver.

OUTCOME

Our model envisages the development of a health expectation as incorporating several longitudinal phases (precipitating phenomenon, prior understanding, cognitive processing, expectation formulation, outcome, post-outcome cognitive processing).

CONCLUSION

Expectations are a highly important but still relatively poorly understood phenomenon in relation to the experience of health and health care. We suggest a pragmatic conceptual model designed to clarify the process of expectation development, in order to inform future research into the measurement of health expectations and to enhance our understanding of the influence of expectations on health behaviours and attitudes.

Optimizing Pharmacists’ Effectiveness as Medication Therapy Managers Through a Segmentation Approach

OBJECTIVE

To determine whether older persons could be segmented into meaningful subgroups that shared similar patterns in terms of self-assessments of medication-related knowledge, beliefs, and perceived abilities.

DESIGN

Secondary analysis of data previously collected from a cross-sectional, descriptive study.

SETTING

United States.

PARTICIPANTS

A total of 500 community-dwelling older persons, 65 years and older, using at least one prescription medication.

INTERVENTION

Mail survey.

MAIN OUTCOME MEASURES

Older persons' self-assessments of medication-related knowledge, beliefs, and perceived abilities, as well as perceptions of pharmacist-patient relationships.

RESULTS

The data set contained usable responses from 330 respondents out of 496 surveys presumably delivered (66.5%). Cluster analysis revealed three groups of older persons who showed differences in terms of medication-related beliefs and perceived abilities. Older persons in group 1 reported worse health, used the most prescription medications, sought the most advice from pharmacists, and had the lowest perceived abilities. Older persons in group 2 reported good health, took the fewest medications, sought pharmacists' advice least frequently, and had the lowest beliefs and high perceived abilities. Older persons in group 3 reported the best health, had the highest beliefs, high perceived abilities, and the highest perceptions of pharmacist participative behavior, patient-centeredness, relationship quality, and commitment.

CONCLUSION

Pharmacists can use a segmentation approach to target those older persons who are most in need of medication therapy management.