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Results for “Medication Adherence”

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PubMedDate not supplied

Concordance among three self-reported measures of medication adherence and pharmacy refill records.

OBJECTIVE: To evaluate the level of agreement among three previously validated self-reported medication adherence measures and pharmacy refill records (RRs). DESIGN: Cross-sectional study. SETTING: Five primary care physician office sites in rural northeast Georgia. PARTICIPANTS: 139 adult patients with one or more of these chronic diseases: hypertension, diabetes mellitus, hypercholesterolemia, hypothyroidism, or a condition requiring hormone replacement therapy. INTERVENTIONS: Study participants completed the Brief Medication Questionnaire (BMQ), the Medication Adherence Survey (MAS), and the Medical Outcomes Study (MOS) instruments; pharmacy RRs for the medication or medications being used to treat the target disease were obtained from pharmacies used by the study participants. MAIN OUTCOME MEASURES: Adherence to medication therapy for target disease. RESULTS: Participants were nearly all white (98.6%), consistent with the Appalachian area in which the study was conducted, and mostly women (71.9%). While 91.4% of study participants reported taking their study medication most or all of the time, RRs showed mean adherence rates of 82.6%, 82.1%, 79.1%, 74.6%, and 69.8% for diabetes mellitus, hypertension, hypothyroidism, hypercholesterolemia, and hormone replacement therapy, respectively. Moderate correlations of .234, .261, and .213 were found between RRs and the MAS, MOS, and BMQ belief screen, respectively. Spearman correlations ranged from .091 between RRs and the BMQ regimen subscale to .313 between MOS and MAS. Pearson chi-square tests showed that only the BMQ belief subscale was significant in this study. CONCLUSION: Because of the weak to moderate concordance found among validated measures of adherence, the selection of a useful adherence measure in pharmacy practice is difficult. These findings underscore the difficulty in both assessing patients' medication-taking behavior and assessing and comparing the results of adherence research. The development of valid and reliable measures for easily assessing medication adherence behavior in community pharmacies is needed.

Adult↗

PubMedDate not supplied

Cultural factors associated with antihypertensive medication adherence in Chinese immigrants.

BACKGROUND: Little is known about hypertension control and cultural factors related to medication adherence in Chinese immigrants. OBJECTIVE: : The purpose of this study was to characterize Chinese immigrants with hypertension and to examine what cultural factors are associated with medication adherence. METHODS: A cross-sectional design was used. Data were gathered from a convenience sample of 200 subjects recruited in an Asian outpatient clinic in the San Francisco Bay Area using self-report questionnaires and blood pressure measurements. Participants were Chinese immigrants 18 years old and older, taking antihypertensive medications, and able to speak Mandarin. RESULTS: The mean age was 71 (+/-10) years. Half were men (50%). Most were married (70%), and reported an annual family income of <20,000 dollars (71%) and an average length of stay in the United States of 13 (+/-7) years. Medication adherence was reported by 75%, although only 51% had controlled hypertension. Four of 8 cultural factors were statistically significant predictors for medication nonadherence: lower perceived susceptibility [OR = 3.77 (95% CI 1.19, 12.01)]; higher perceived benefit of Chinese herbs [OR = 2.21 (95% CI 1.02, 4.81)]; lower perceived benefit of Western medications for hypertension [OR = 2.78 (95% CI 1.13, 6.84)]; and longer length of stay in the United States [OR = 2.48 (95% CI 1.12, 5.50)]. CONCLUSIONS: Four cultural factors were identified as significant predictors of medication nonadherence in this sample. These findings can guide culturally appropriate nursing interventions for hypertension management in Chinese immigrants.

Adult↗

PubMedDate not supplied

Effectiveness of different medication management approaches on elders' medication adherence.

This pilot study investigated the effects of three different medication management approaches on medication adherence and resource utilization. Sixty-one participants living in an independent elder community in South Florida were randomly assigned to one of the three medication management approaches: (1) a pillbox method, (2) a voice-activated method, and (3) self-administration of medications as they had in the past. One outcome was measured by recording the number of doses of medications ingested over a 1-, 3-, and 6-month period. Adherence to medications also was measured by the impact on the medical diagnosis. For example, the hypertensive group was defined adherent by a sustained normotensive pressure. Participants' medical records were examined as to the number of physician office visits, hospitalizations, and home health visits. There were significant differences in the mean number of doses missed, with the fewest in the voice-activated group to the highest in the self-administration (control) group. Additionally, the group that self-administered their own medications had more frequent physician office visits and increased hospitalizations. Because the elder population is prone to medication mismanagement for a variety of reasons, nurses are in a unique position to identify populations at risk and suggest interventions that may improve medication adherence.

Aged↗

PubMed2006

A systematic review of the effects of home blood pressure monitoring on medication adherence.

Home blood pressure monitoring (HBPM) improves blood pressure control, but little is known about its effects on medication adherence. The authors conducted a systematic review of the published literature on the effects of HBPM on medication adherence. Of 440 abstracts and citations reviewed, 11 randomized control trials met predefined criteria. Six of the 11 randomized controlled trials reported statistically significant improvement in medication adherence; 84% of these were complex interventions involving the use of HBPM in combination with other adherence-enhancing strategies such as patient counseling by nurses, pharmacists, or a telephone-linked system; patient education; and the use of timed medication reminders. Interventions conducted in primary care settings were not effective compared with those that occurred in hospital-based clinics or nonclinical settings. The data on the effects of HBPM on patients' medication-taking behavior are mixed. Future studies should investigate the independent effects of HBPM in primary care practices where the majority of hypertensive patients receive their care.

Antihypertensive Agents↗

PubMed2006

An RCT of the effect of motivational interviewing on medication adherence in hypertensive African Americans: rationale and design.

BACKGROUND: Hypertension disproportionately affects African Americans compared to whites, and it is the single most common explanation for the disparity in mortality between African Americans and whites. Adherence with antihypertensive medications can help reduce risk of negative hypertension-related outcomes. Motivational interviewing is a promising patient-centered approach for improving adherence in patients with chronic diseases. In this paper we describe the rationale and design of an ongoing randomized controlled trial testing the effectiveness of motivational interviewing versus usual care in improving medication adherence among 190 African American uncontrolled hypertensive patients, who receive care in a primary care setting. METHODS: The usual care group receives standard medical care, while those in the intervention group receive standard care plus four sessions of motivational interviewing at 3-month intervals for a period of 1 year. This technique consists of brief, patient-driven counseling sessions to facilitate initiation and maintenance of behavior change. The primary outcome is adherence to prescribed antihypertensive medication, assessed with the electronic medication events monitoring system (MEMS) and the Morisky self-report adherence questionnaire. Secondary outcomes are within-patient changes in blood pressure, self-efficacy, and intrinsic motivation between baseline and 12 months. We report the baseline sociodemographic and clinical characteristics of the participants. CONCLUSIONS: Despite the potential utility of motivational interviewing, little is known about its effectiveness in improving medication adherence among hypertensive patients, especially African Americans. In addition to the baseline data this study has generated, this trial should provide data with which we can assess the effectiveness of this approach as a behavioral intervention.

Black or African American↗

PubMed1981

Evaluation and training of medication adherence counselors in a clinical trial: application of a skill inventory to video-recorded interviews.

This report describes the procedures and feasibility of an integrated evaluation and training program developed at the Baylor-Methodist Lipid Research Clinic to examine the skills used by the clinic's professional staff in conducting medication adherence interviews with participants in the Coronary Primary Prevention Trial (CPPT). The specific aims of this project were to evaluate the staff's interviewing and counseling skills, identify strengths and deficits, provide needed training, and reexamine the staff's skills following this training. Each of five staff members conducted two 20-minute video-recorded interviews with two different simulated CPPT participants. A trained observer reviewed the video-recordings and evaluated, by an Inventory for Interviewing and Counseling Skills for Adherence to Medication (IICS-AM), each staff member's possession and frequency of use of 17 interviewing skills and 10 counseling skills. The 27 skills on the IICS-AM were selected from the literature as being most frequently recommended for effective interviewing and counseling for medication adherence. These rating data were used to design a 14-week training program to acquire and promote the use of these skills. Following training, the video-recorded interview procedure was repeated and the data analyzed to identify the effects of the training program. The integrated evaluation and training procedures used in this project offer a practical, objective method for examining, improving, and monitoring the skills of the adherence counseling staff in a clinic participating in a multicenter clinical trial.

Audiovisual Aids↗

PubMed1983

Effect of spouse support and health beliefs on medication adherence.

This study addressed the issue of social support for patients' adherence to medical regimens. Social support of wives was assessed by structured interview of 150 male participants in the Coronary Primary Prevention Trial, their wives, and medical staff. In addition, wives were interviewed about their beliefs related to their husbands' health and participation in the trial. Unobtrusive packet counts were used as the measure of adherence. The participants were classified as having high spouse support if wife support scores were in the top one third of the distribution and as having low spouse support if scores were in the bottom one third as measured from inquiry of the participant, the spouse, and the staff. The adherence of men having low support averaged 70 percent, significantly lower than the high-support group, which averaged 96 percent. The correlations between spouses' health beliefs and their level of support were significant for three of four health belief variables. In particular, highly adhering men had wives who believed more strongly in the benefits of the Coronary Primary Prevention Trial.

Adult↗

PubMed2004

Posttraumatic stress disorder symptoms, salivary cortisol, medication adherence, and CD4 levels in HIV-positive individuals.

Previous research has reported rates of posttraumatic stress disorder (PTSD) following diagnosis with a life-threatening disease ranging from 5 to 42%. However, few studies have examined the impact of PTSD symptoms on disease markers or adherence to medical regimens. The present study represents an initial examination of the relationships among self-reported PTSD symptoms stemming from diagnosis with HIV, CD4 cell counts, salivary cortisol levels and adherence to highly active antiretroviral therapy (HAART) in 110 African-American and Caucasian individuals with HIV. Results revealed that the relationship between PTSD and disease progression is multifaceted: PTSD symptoms were related to worse adherence to HAART therapy, but were also associated with lower morning salivary cortisol levels and higher CD4 cell counts.

Adult↗

PubMed2004

Meta-analysis of interventions for medication adherence to antihypertensives.

OBJECTIVE: To identify methods targeted at improving adherence to antihypertensives and determine their effect on adherence using meta-analytic techniques. METHODS: A literature search from 1970 to December 2000 using MEDLINE, International Pharmaceutical Abstracts, PsychLit, ERIC, and EMBASE was performed using the terms compliance, adherence, and medication. Randomized articles with an intervention directed at a patient/caregiver, a comparator group, and a minimum of 10 subjects in each intervention group were identified by 3 independent reviewers. Articles that did not report sample size data or adequate results of the intervention were excluded. Sixteen citations focusing on antihypertensive adherence were identified. Of the 16 citations, 6 studied either more than one intervention in the same population or different interventions in different patient populations, yielding 24 cohorts with 2446 patients. RESULTS: Fifty-eight percent of the methods focused on behavioral interventions (BIs), 29% studied the effect of a combination of behavioral and educational interventions (BEIs), and 13% utilized educational interventions (EIs) alone. Overall, the study groups were nonhomogenous (Q = 183.92; p < 0.001). However, when the groups were separated by the intervention type, the BIs were homogenous (Q = 1.19; p = 1.00) with an overall effect size (ES) of 0.04 (95% CI -0.01 to -0.09), indicating a trend toward improved adherence. Fifty percent of the BIs were performed in the physician's office; however, setting did not influence the intervention's impact (p = 0.13). Within the BIs, no single intervention improved adherence over others. CONCLUSIONS: Based on the interventions included in this meta-analysis, there is no single intervention that improves adherence to antihypertensives over others; therefore, a patient-specific approach should be modeled.

Antihypertensive Agents↗

PubMed2003

Meta-analysis of trials of interventions to improve medication adherence.

The effect of tools and methods designed to enhance medication adherence that have been evaluated in randomized controlled trials was studied. A literature search was performed with MEDLINE, International Pharmaceutical Abstracts, PsychLIT, ERIC, and EMBASE for the period from 1966 to December 2000. Only randomized, controlled trials with at least 10 subjects per intervention group were included. Of 484 articles evaluated, only 61 met the criteria for the meta-analysis. Multiple interventions or study samples were identified in 23 of the articles. Each intervention was counted as a separate study, yielding 95 cohorts totaling 18,922 subjects. Of these subjects, 9,604 (51%) received interventions and 9,318 served as controls. Cohorts reported between 1990 and 1999 accounted for 53% of the sample; 56% of all cohorts were based in physician offices and 26% involved hypertensive patients. Behavioral interventions accounted for 41 cohorts (8,885 subjects), educational interventions for 22 cohorts (6,392 subjects), and combined interventions for 32 cohorts (3,645 subjects). Homogeneity of groupings and effect sizes (ESs) were calculated for each type of intervention. Overall, the data were not homogeneous, so conclusions could not be derived from the entire body of data. The educational intervention and combined intervention cohorts were nonhomogeneous (p < 0.001 and p < 0.01, respectively); however, the behavioral intervention cohort was homogeneous (Q = 42.48, d.f. = 40, p = 0.36). The overall ES for behavioral interventions was 0.07 (95% confidence interval [CI] = 0.04-0.09). There were no significant differences among the behavioral interventions. Educational interventions had an overall ES of 0.11 (95% CI = 0.06-0.15); there were no significant differences among the educational interventions. The overall ES of the combined interventions was 0.08 (95% CI = 0.04-0.12). When stratifying the combined intervention group by type of behavioral intervention, mail reminders had the largest impact (ES = 0.38). Meta-analysis of studies of interventions to improve medication adherence revealed an increase in adherence of 4-11%. No single strategy appeared to be best.

Adult↗

PubMed2004

Assessing medication adherence self-efficacy among low-literacy patients: development of a pictographic visual analogue scale.

Health behavior interventions are often grounded in Social Cognitive Theory, but instruments used to assess self-efficacy rely on verbal skills and yield scores that are highly positively skewed. Based on a review of the research literature and qualitative research with key informants, a pictographic medication adherence self-efficacy scale was developed. Two studies were conducted to test the pictographic and color visual analogue scale for assessing self-efficacy for medication adherence. Study 1 (N = 81) demonstrated that the pictographic self-efficacy scale was internally consistent (alpha = 0.68), time stable (2-week test-re-test r = 0.63), and showed evidence for convergent and divergent construct validity. Study 2 (N = 64) further supported the reliability of the pictographic self-efficacy scale with additional data supporting its convergent, divergent and criterion-related validity, including associations with medication adherence and HIV viral load. Distributions of self-efficacy scores approximated normal. This newly developed pictographic scale may be useful in assessing medication adherence self-efficacy in lower-literacy populations.

Adult↗

PubMed2005

Integration of motivational interviewing and cognitive behavioral therapy to improve HIV medication adherence and reduce substance use among HIV-positive men and women: results of a pilot project.

Directly addressing HIV medication adherence and substance use together is ideal in light of the research on the complex connections between these two behaviors. This paper describes the development of a pilot program in which a combined motivational interviewing and cognitive behavioral therapy intervention was used to increase adherence to highly active antiretroviral therapy (HAART) and reduce substance use in HIV-infected adults. The main goals of the pilot study were (1) to confirm the ability to recruit HIV-positive substance users taking HAART; (2) to demonstrate the ability to retain participants over the course of an eight-session intervention; and (3) to examine changes in substance use and HAART adherence from pretreatment to posttreatment. Twelve HIV-positive adults with a substance use disorder participated in an 8-week intervention, which consisted of weekly individual sessions with a trained therapist. Results showed that despite the small sample size, there was a significant reduction in substance use from pretreatment to posttreatment. No statistically significant differences were found for changes in HIV medication adherence, but the trends suggest the potential for positive results with a larger sample. Retention for all eight sessions of the treatment was 73.3%. Eighty percent completed the 3-month follow-up assessment. Participants reported high therapeutic alliance reflecting comfort with their therapists and in the treatment. Overall, the pilot demonstrated feasibility and acceptability of the treatment. Furthermore, results suggest that this may, in fact, be an effective intervention to reduce substance use and improve HIV medication adherence.

Adult↗

PubMed2006

Effect of personal and cultural beliefs on medication adherence in the elderly.

Approximately 50% of patients across all age groups with varied types of medical conditions do not adhere to their prescribed medication regimens. Medication nonadherence is common in older adults who are often prescribed medications for age-related chronic disorders. The purpose of this paper is to investigate the effect of personal and cultural beliefs on older adults' medication adherence through a review of research studies published in journals across different disciplines. A systematic literature search using ten databases found 14 articles meeting the inclusion criteria. Belief-laden variables including self-efficacy (i.e. the belief that one can perform a specific behaviour under differing conditions), medication efficacy, confidence in the physician's knowledge, perceptions about natural products and home remedies, beliefs of control (over one's health), and illness perceptions were found to be significantly related to medication adherence among older adults. However, several measurement, design and sampling problems were identified in this review. The majority of the studies in the review evaluated older adults' medication adherence by self-report and used cross-sectional designs and convenience samples. Future studies should utilise prospective longitudinal designs and a more objective measure of medication adherence, such as electronic event monitoring, when examining factors related to older adults' medication adherence. Future research should also evaluate belief-related variables in larger and more ethnically diverse samples of older adults. Implications for assessment and intervention are evident from this literature review of the effect of personal and cultural beliefs on medication adherence in older adults.

Aged↗

PubMed2004

Association of medication adherence, knowledge, and skills with emergency department visits by adults 50 years or older with congestive heart failure.

PURPOSE: The association of medication adherence, knowledge, and skills with emergency department (ED) visits by patients 50 years of age or older with congestive heart failure (CHF) was studied. METHODS: The patients in this study were enrolled in the usual care group of an ongoing trial of patients with CHF to determine the effects of a pharmacy-based intervention on relevant outcomes. Participants' medication knowledge and skills were assessed during individual interviews. Medication knowledge assessed patients' knowledge of the dosage, frequency, and indication of each of their CHF medications. The medications skills assessment evaluated patients' dexterity (ability to open medication bottles), literacy (ability to read labels), and ability to distinguish colors of tablets and capsules. Medication adherence to CHF drugs was calculated from electronic monitors and prescription-refill records over a six-month period. The primary outcomes of this study were the numbers of all-cause cardiovascular and CHF-specific ED visits during a six-month period. Log-linear regression models were used to analyze the effects of medication knowledge, skill, and adherence on ED visits. RESULTS: Sixty-one patients participated in this study. Multivariate log-linear models adjusted for demographic variables showed that lower medication adherence (p < 0.001) and an inability to read standard prescription and auxiliary labels (p = 0.002) were associated with an increased number of cardiovascular-related ED visits. Knowledge of the prescribed dose was associated with CHF-specific ED visits (p < 0.001). CONCLUSION: Greater medication knowledge, skills, and adherence were associated with fewer ED visits among patients 50 years of age or older with CHF in an urban, teaching medical center.

Adult↗

PubMed2005

Visual feedback therapy to enhance medication adherence in psychosis.

Adherence to antipsychotic medications is key to enhancing maximum responses to medication and to decreasing relapse rates among those with psychotic disorders. Visual feedback therapy used electronic monitoring to provide visual feedback of daily medication-taking behaviors, combined with supportive counseling and education components. Twenty-three participants with DSM-IV diagnoses of psychotic disorders were recruited from community and inpatient settings. No statistical significance was found for intervention weekly for 1 month, followed by monthly for 2 months, although a majority of participants either maintained or increased adherence rates at 1 month. Additional findings included associations between low insight and low adherence and descriptive data on medication adherence behaviors.

Adult↗

PubMed2006

Course of depressive symptoms and medication adherence after acute coronary syndromes: an electronic medication monitoring study.

OBJECTIVES: We tested whether improvements in depressive symptoms precede improved adherence to aspirin in patients with acute coronary syndromes (ACS). BACKGROUND: Depression is associated with medication nonadherence in patients with ACS, but it is unclear whether changes in depression impact on adherence. METHODS: Electronic medication monitoring was used to measure adherence to aspirin during a 3-month period in a consecutive cohort of 172 patients (25 to 85 years) recruited within 1 week of hospitalization for ACS. Depressive symptom severity was assessed using the Beck Depression Inventory (BDI) during hospitalization and at 1 and 3 months after hospitalization. Adherence was defined as the percentage of days aspirin was taken as prescribed. RESULTS: Depression severity in hospital was associated with nonadherence in a gradient fashion: 15% of non-depressed patients (BDI score 0 to 4), 29% of mildly depressed patients (BDI score 10 to 16), and 37% of patients with moderately-to-severely depressive symptoms (BDI score >16) took aspirin less than 80% of the time (p = 0.03). A cross-lagged path analytic model revealed that improvements in depressive symptoms in the first month after the ACS were associated with improvements in adherence rates in the subsequent 2 months (standardized direct effect -0.32, p = 0.016). CONCLUSIONS: Diagnosis and treatment of depressive symptoms may improve medication adherence in patients after ACS.

Acute Disease↗

PubMed2003

Polypharmacy and medication adherence in patients with type 2 diabetes.

OBJECTIVE: To determine medication adherence and predictors of suboptimal adherence in a community cohort of patients with diabetes and to test the hypothesis that adherence decreases with increased number of medicines prescribed. RESEARCH DESIGN AND METHODS: A total of 128 randomly selected patients with type 2 diabetes from a single community health center responded to a pharmacist-administered questionnaire regarding medication use. Survey data were linked to clinical data available from the electronic medical record. We assessed self-reported adherence rates for each diabetes-related medicine, barriers and attitudes regarding medication use, and HbA(1c), total cholesterol, and blood pressure levels. RESULTS: Patients were taking a mean of 4.1 (+/-1.9) diabetes-related medicines. The average 7-day adherence was 6.7 +/- 1.1 days. Total number of medicines prescribed was not correlated with medication adherence. Adherence was significantly lower for medicines not felt to be improving current or future health (6.1 vs. 6.9 days out of 7, P < 0.001). Among patients on three or more medicines, 71% (15 of 21 patients) with suboptimal adherence were perfectly adherent with all but one medicine. Side effects were the most commonly reported problem with medication use. Of 29 medicines causing side effects that interfered with adherence, 24 (83%) did so for >1 month, and only 7 (24%) were reported to the patient's primary care physician. CONCLUSIONS: In this sample, patients reported very high medication adherence rates regardless of number of medicines prescribed. Among patients on multiple medicines, most patients with suboptimal adherence were perfectly adherent to all but one medicine. Unreported side effects and a lack of confidence in immediate or future benefits were significant predictors of suboptimal adherence. Physicians should not feel deterred from prescribing multiple agents in order to achieve adequate control of hyperglycemia, hypertension, and hyperlipidemia.

Adult↗

PubMed2002

Human immunodeficiency virus infection unresponsive to highly active antiretroviral therapy: denial of poor medication adherence or recalcitrant infection?

Poor clinical and virologic response to combination antiretroviral therapy for human immunodeficiency virus (HIV) infection may stem from a variety of factors including poor medication adherence, development of drug-resistant HIV strains, drug interactions, efflux pumps, and unfavorable pharmacokinetics. Diagnosing nonadherence to medication is particularly challenging. We present a case of lack of response to antiretroviral therapy in a patient who denied problems with medication adherence. The patient underwent a variety of objective examinations, all of which suggested poor medication adherence was responsible for his nonresponse to antiretrovirals. An approach to evaluating patients for causes of poor response to antiretroviral therapy and nonadherence and implications for clinical practice are discussed.

Adult↗