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"Adherence"
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A Systematic Review of Medication Adherence Thresholds Dependent of Clinical Outcomes
by
Baumgartner, Pascal C.
,
Hersberger, Kurt E.
,
Arnet, Isabelle
in
adherence measurement methods
,
Antihypertensives
,
Chronic illnesses
2018
In pharmacotherapy, the achievement of a target clinical outcome requires a certain level of medication intake or adherence. Based on Haynes's early empirical definition of sufficient adherence to antihypertensive medications as taking ≥80% of medication, many researchers used this threshold to distinguish adherent from non-adherent patients. However, we propose that different diseases, medications and patient's characteristics influence the cut-off point of the adherence rate above which the clinical outcome is satisfactory (thereafter medication adherence threshold). Moreover, the assessment of adherence and clinical outcomes may differ greatly and should be taken into consideration. To our knowledge, very few studies have defined adherence rates linked to clinical outcomes. We aimed at investigating medication adherence thresholds in relation to clinical outcomes.
We searched for studies that determined the relationship between adherence rates and clinical outcomes in the databases PubMed, Embase
and Web of Science™ until December 2017, limited to English-language. Our outcome measure was any threshold value of adherence. The inclusion criteria of the retrieved studies were (1) any measurement of medication adherence, (2) any assessment of clinical outcomes, and (3) any method to define medication adherence thresholds in relation to clinical outcomes. We excluded articles considered as a tutorial. Two authors (PB and IA) independently screened titles and abstracts for relevance, reviewed full-texts, and extracted items. The results of the included studies are presented qualitatively.
We analyzed 6 articles that assessed clinical outcomes linked to adherence rates in 7 chronic disease states. Medication adherence was measured with Medication Possession Ratio (MPR,
= 3), Proportion of Days Covered (PDC,
= 1), both (
= 1), or Medication Event Monitoring System (MEMS). Clinical outcomes were event free episodes, hospitalization, cortisone use, reported symptoms and reduction of lipid levels. To find the relationship between the targeted clinical outcome and adherence rates, three studies applied logistic regression and three used survival analysis. Five studies defined adherence thresholds between 46 and 92%. One study confirmed the 80% threshold as valid to distinguish adherent from non-adherent patients.
The analyzed studies were highly heterogeneous, predominantly concerning methods of calculating adherence. We could not compare studies quantitatively, mostly because adherence rates could not be standardized. Therefore, we cannot reject or confirm the validity of the historical 80% threshold. Nevertheless, the 80% threshold was clearly questioned as a general standard.
Journal Article
Effectiveness of an mHealth Intervention With Short Text Messages to Promote Treatment Adherence Among HIV-Positive Mexican Adults: Randomized Controlled Trial
by
Herrera Godina, Melva Guadalupe
,
Martínez Ayala, Pedro
,
Del Moral Trinidad, Luis Eduardo
in
Adult
,
Adults
,
Antiretroviral drugs
2025
HIV continues to be a public health concern in Mexico and Latin America due to an increase in new infections, despite a decrease being observed globally. Treatment adherence is a pillar for achieving viral suppression. It prevents the spread of the disease at a community level and improves the quality and survival of people living with HIV. Thus, it is important to implement strategies to achieve sustained treatment adherence.
The objective of this study is to evaluate the effectiveness of a mobile health (mHealth) intervention based on SMS text messages to increase antiretroviral therapy (ART) adherence for HIV-positive adults.
A randomized controlled trial was performed at the Hospital Civil de Guadalajara - Fray Antonio Alcalde on HIV-positive adults who had initiated ART. The mHealth intervention included the use of SMS text messages as a reminder system for upcoming medical examinations and ART resupply to increase adherence. This intervention was provided to 40 participants for a 6-month period. A control group (n=40) received medical attention by the standard protocol used in the hospital. Intervention effectiveness was assessed by quantifying CD4+ T cells and viral load, as well as a self-report of adherence by the patient.
The intervention group had greater adherence to ART than the control group (96% vs 92%; P<.001). In addition, the intervention group had better clinical characteristics, including a lower viral load (141 copies/mL vs 2413 copies/mL; P<.001) and a trend toward higher CD4+ T cells counts (399 cells/μL vs 290 cells/μL; P=.15).
These results show that an mHealth intervention significantly improves ART adherence. Implementing mHealth programs could enhance the commitment of HIV-positive adults to their treatment.
Journal Article
Persistence with secondary prevention medications after acute myocardial infarction: Insights from the TRANSLATE-ACS study
by
Henry, Timothy D.
,
Honeycutt, Emily
,
Wang, Tracy Y.
in
Acute coronary syndromes
,
Adenosine
,
Adrenergic beta-Antagonists - therapeutic use
2015
Persistent use of secondary prevention therapies after acute myocardial infarction (MI) is critical to optimizing long-term outcomes.
Medication persistence was assessed among 7,955 MI patients in 216 hospitals participating in the Treatment with Adenosine Diphosphate Receptor Inhibitors: Longitudinal Assessment of Treatment Patterns and Events after Acute Coronary Syndrome study from 2010 to 2012. Persistence was defined as continuation of aspirin, adenosine diphosphate receptor inhibitors, β-blockers, angiotensin-converting enzyme inhibitors/angiotensin receptor blockers, and statins from discharge to 6 months post-MI. Multivariable logistic regression modeling was used to determine factors associated with nonpersistence, defined as <80% persistence with all medication classes.
Overall, 31% of MI patients stopped taking a least 1 medication by 6 months. The most common reasons cited for medications discontinuation were side effects and physician instruction (57%), whereas financial concerns were cited in 8% overall. After multivariable modeling, black race (odds ratio 1.36, 95% CI 1.15-1.62), older age (odds ratio 1.07, 95% CI 1.02-1.12), atrial fibrillation (odds ratio 1.67, 95% CI 1.33-2.09), dialysis (odds ratio 1.79, 95% CI 1.15-2.78), and depression (odds ratio 1.22, 95% CI 1.02-1.45) were associated with lower likelihood of persistence. Private insurance (odds ratio 0.85, 95% 0.76-0.95), prescription cost assistance (odds ratio 0.63, 95% CI 0.54-0.75), and outpatient follow-up arranged before discharge (odds ratio 0.89, 95% CI 0.80-0.99) were associated with higher persistence.
Nearly one-third of MI patients are no longer persistent with their prescribed medications by 6 months. Patients at high risk for nonpersistence may be identified by clinical and sociodemographic features. These observations underscore key opportunities to optimize longitudinal use of secondary prevention therapies.
Journal Article
Effect of Therapy Reminder Application on Treatment Adherence in Adults with Beta-Thalassemia Major: A Randomized Clinical Trial
by
Arian, Mahdieh
,
Mehrabadi, Fatemeh
,
Badiee, Zahra
in
Adult
,
beta-Thalassemia - drug therapy
,
beta-Thalassemia - psychology
2025
Non-adherence to treatment in patients with beta-thalassemia major (BTM) presents a significant challenge in effective disease management. This study aimed to assess the effect of a therapy reminder application (app) on treatment adherence in adult patients with BTM in Mashhad in 2024.
A randomized clinical trial was conducted in 2024 at a thalassemia clinic affiliated with Mashhad University of Medical Sciences (Mashhad, Iran). Participants were randomly assigned to the intervention and control groups, using permuted block randomization, with concealed allocation. The intervention group used the ThalaMe therapy reminder app for 8 weeks (February-July 2024), while the control group received standard care. Medication adherence was measured using the Morisky Medication Adherence Scale (MMAS-8) and the Chronic Disease Treatment Adherence Questionnaire (CDTAQ) before and after the intervention. Statistical analysis was conducted using SPSS software, using paired
tests or Wilcoxon signed-rank tests for within-group comparisons and independent
tests or Mann-Whitney U tests for between-group comparisons. P<0.05 was considered statistically significant.
The study included 76 adult patients with BTM, equally distributed between the intervention and control groups (n=38 each). Baseline measurements showed no significant differences between groups in either MMAS-8 scores (P=0.75) or CDTAQ scores (P=0.11). The MMAS-8 was inversely scored, with lower scores indicating higher adherence. Following the 8-week intervention period, the group using the ThalaMe app demonstrated significantly better adherence outcomes (1.05±0.78) than the controls (2.92±1.4, P<0.001). The intervention group had significantly higher CDTAQ scores (185.5±8.07) than the control group (151.79±27.08, P<0.001).
The therapy reminder app significantly enhanced medication adherence and treatment management in patients with BTM, while simultaneously enhancing patient and family engagement through counseling.
IRCT20240222061079N1.
Journal Article
A Cluster-Randomized Controlled Trial of an Economic Strengthening Intervention to Enhance Antiretroviral Therapy Adherence among Adolescents Living with HIV
by
Najjuuko, Claire
,
Kizito, Samuel
,
Nabayinda, Josephine
in
Adherence
,
Adolescents
,
Antiretroviral agents
2024
We examined the impact of an economic empowerment intervention on ART adherence among ALHIV. We used data from 455 ALHIV, randomized into intervention, n = 111, and control n = 344. ALHIV were aged 12–16 and recruited from 39 clinics in Uganda between January 2013 and December 2015. The intervention comprised a long-term child development account (CDA), micro-enterprise workshops, and educational sessions. Adherence was measured using unannounced pill counts. We used mixed-effects logistic regression analysis to examine the effect of the intervention on ART adherence. The mean age was 12.6 years. Despite observing non-significant group main effects, we found significant group-by-time interaction effects χ2(5) = 45.41, p < 0.001. Pairwise comparisons showed that compared to the control group, participants who received the intervention had significantly higher adherence at visit four, OR = 1.52 (95% CI: 1.07–2.18), p = 0.020; visit five, OR = 1.59 (95% CI: 1.06–2.38), p = 0.026; and visit six, OR = 1.94 (95% CI: 1.24–3.04), p = 0.004. Efforts to support ALHIV to live longer and healthier lives should incorporate components addressing poverty. However, declining adherence raises concerns over ALHIV’s long-term well-being. The trial was registered at ClinicalTrials.gov, registration number NCT01790373, with a primary outcome of adherence to HIV treatment.
Journal Article
Predictors of medication adherence among patients with severe psychiatric disorders: findings from the baseline assessment of a randomized controlled trial (Tecla)
by
Grabe, Hans-Jörgen
,
Stentzel, Ulrike
,
Schwaneberg, Thea
in
Activities of Daily Living - psychology
,
Adherence
,
Adult
2018
Background
Schizophrenia and bipolar disorder are characterized by a high disease burden. Antipsychotic medication is an essential part of the treatment. However, non-adherence is a major problem. Our aim was to examine potential determinants of non-adherence for patients with severe mental disorders.
Methods
Baseline data of the study “Post stationary telemedical care of patients with severe psychiatric disorders” (Tecla) were used. Medication adherence was assessed with the Medication Adherence Report Scale German version (MARS-D). A logistic regression was calculated with age, sex, education, employment status, level of global functioning, social support and intake of typical and atypical antipsychotics as predictors.
Results
N
= 127 participants were included in the analysis (
n
= 73 men, mean age 42 years). The mean MARS-D Score was 23.4 (SD 2.5). The most common reason for non-adherence was forgetting to take the medicine. Significant positive determinants for adherence were older age (OR 1.02, 95% CI 1.011–1.024,
p
< 0.0001), being employed (OR 2.46, 95% CI 1.893–3.206,
p
< 0.0001), higher level of global functioning (overall measure of how patients are doing) (OR 1.02, 95% CI 1.012–1.028,
p
< 0.0001), having social support (OR 1.02, 95% CI 1.013–1.026,
p
< 0.0001), and intake of typical antipsychotics (OR 2.389, 95% CI 1.796–3.178,
p
< 0.0001). A negative determinant was (female) sex (OR 0.73, 95% CI 0.625–0.859,
p
= 0.0001).
Conclusions
Especially employment, functioning and social support could be promising targets to facilitate adherence in patients with schizophrenia or bipolar disorder.
Trial registration
This study is retrospectively registered at the German Clinical Trials Register with the trial registration number
DRKS00008548
at 21/05/2015.
Journal Article
Design of the PROstate cancer follow-up care in Secondary and Primary hEalth Care study (PROSPEC): a randomized controlled trial to evaluate the effectiveness of primary care-based follow-up of localized prostate cancer survivors
by
van Weert, Henk C. P. M.
,
van Asselt, Kristel M.
,
Boekhout, Annelies H.
in
Aftercare - economics
,
Aftercare - methods
,
Aftercare - organization & administration
2020
Background
In its 2006 report,
From cancer patient to cancer survivor: lost in transition
, the U.S. Institute of Medicine raised the need for a more coordinated and comprehensive care model for cancer survivors. Given the ever increasing number of cancer survivors, in general, and prostate cancer survivors, in particular, there is a need for a more sustainable model of follow-up care. Currently, patients who have completed primary treatment for localized prostate cancer are often included in a specialist-based follow-up care program. General practitioners already play a key role in providing continuous and comprehensive health care. Studies in breast and colorectal cancer suggest that general practitioners could also consider to provide survivorship care in prostate cancer. However, empirical data are needed to determine whether follow-up care of localized prostate cancer survivors by the general practitioner is a feasible alternative.
Methods
This multicenter, randomized, non-inferiority study will compare specialist-based (usual care) versus general practitioner-based (intervention) follow-up care of prostate cancer survivors who have completed primary treatment (prostatectomy or radiotherapy) for localized prostate cancer. Patients are being recruited from hospitals in the Netherlands, and randomly (1:1) allocated to specialist-based (
N
= 195) or general practitioner-based (
N
= 195) follow-up care. This trial will evaluate the effectiveness of primary care-based follow-up, in comparison to usual care, in terms of adherence to the prostate cancer surveillance guideline for the timing and frequency of prostate-specific antigen assessments, the time from a biochemical recurrence to retreatment decision-making, the management of treatment-related side effects, health-related quality of life, prostate cancer-related anxiety, continuity of care, and cost-effectiveness. The outcome measures will be assessed at randomization (≤6 months after treatment), and 12, 18, and 24 months after treatment.
Discussion
This multicenter, prospective, randomized study will provide empirical evidence regarding the (cost-) effectiveness of specialist-based follow-up care compared to general practitioner-based follow-up care for localized prostate cancer survivors.
Trial registration
Netherlands Trial Registry, Trial
NL7068
(NTR7266). Prospectively registered on 11 June 2018
Journal Article
Project YES! Youth Engaging for Success: A randomized controlled trial assessing the impact of a clinic-based peer mentoring program on viral suppression, adherence and internalized stigma among HIV-positive youth (15-24 years) in Ndola, Zambia
2020
Youth-led strategies remain untested in clinic-based programs to improve viral suppression (VS) and reduce stigma among HIV-positive adolescents and young adults (AYA) in sub-Saharan Africa. In response, Project YES! placed paid HIV-positive youth peer mentors (YPM) in four HIV clinics in Ndola, Zambia including a Children's Hospital (pediatric setting), an adult Hospital and two primary care facilities (adult settings).
A randomized controlled trial was conducted from December 2017 to February 2019. Consecutively recruited 15 to 24-year-olds were randomly assigned to an intervention arm with monthly YPM one-on-one and group sessions and optional caregiver support groups, or a usual care comparison arm. Survey data and blood samples were collected at baseline and at the six-month midline. Generalized estimating equation models evaluated the effect of study arm over time on VS, antiretroviral treatment (ART) adherence gap, and internalized stigma.
Out of 276 randomized youth, 273 were included in the analysis (Intervention n = 137, Comparison n = 136). VS significantly improved in both arms (I:63.5% to 73.0%; C:63.7% to 71.3.0%) [OR:1.49, 95% CI:1.08, 2.07]. In a stratified analysis intervention (I:37.5% to 70.5%) versus the comparison (C:60.3% to 59.4%) participants from the pediatric clinic experienced a relative increase in the odds of VS by a factor of 4.7 [interaction term OR:4.66, 95% CI:1.84, 11.78]. There was no evidence of a study arm difference in VS among AYA in adult clinics, or in ART adherence gaps across clinics. Internalized stigma significantly reduced by a factor of 0.39 [interaction term OR:0.39, 95% CI:0.21,0.73] in the intervention (50.4% to 25.4%) relative to the comparison arm (45.2% to 39.7%).
Project YES! engaged AYA, improving VS in the pediatric clinic and internalized stigma in the pediatric and adult clinics. Further research is needed to understand the intersection of VS and internalized stigma among AYA attending adult HIV clinics.
ClinicalTrials.gov NCT04115813.
Journal Article
How Surrogates Decide: A Secondary Data Analysis of Decision-Making Principles Used by the Surrogates of Hospitalized Older Adults
2017
BackgroundMany hospitalized adults do not have the capacity to make their own health care decisions and thus require a surrogate decision-maker. While the ethical standard suggests that decisions should focus on a patient’s preferences, our study explores the principles that surrogates consider most important when making decisions for older hospitalized patients.ObjectivesWe sought to determine how frequently surrogate decision-makers prioritized patient preferences in decision-making and what factors may predict their doing so.Design and ParticipantsWe performed a secondary data analysis of a study conducted at three local hospitals that surveyed surrogate decision-makers for hospitalized patients 65 years of age and older.Main MeasuresSurrogates rated the importance of 16 decision-making principles and selected the one that was most important. We divided the surrogates into two groups: those who prioritized patient preferences and those who prioritized patient well-being. We analyzed the two groups for differences in knowledge of patient preferences, presence of advance directives, and psychological outcomes.Key ResultsA total of 362 surrogates rated an average of six principles as being extremely important in decision-making; 77.8% of surrogates selected a patient well-being principle as the most important, whereas only 21.1% selected a patient preferences principle. Advance directives were more common to the patient preferences group than the patient well-being group (61.3% vs. 44.9%; 95% CI: 1.01–3.18; p = 0.04), whereas having conversations with the patient about their health care preferences was not a significant predictor of surrogate group identity (81.3% vs. 67.4%; 95% CI: 0.39–1.14; p = 0.14). We found no differences between the two groups regarding surrogate anxiety, depression, or decisional conflict.ConclusionsWhile surrogates considered many factors, they focused more often on patient well-being than on patient preferences, in contravention of our current ethical framework. Surrogates more commonly prioritized patient preferences if they had advance directives available to them.
Journal Article
High Acceptability of HIV Pre-exposure Prophylaxis but Challenges in Adherence and Use: Qualitative Insights from a Phase I Trial of Intermittent and Daily PrEP in At-Risk Populations in Kenya
by
Singh, Sagri
,
Mugo, Peter
,
Priddy, Frances
in
Acceptability
,
Acquired Immune Deficiency Syndrome
,
Activities of daily living
2013
This paper used qualitative methods to explore experiences of men who have sex with men and female sex workers in Nairobi and Mtwapa, Kenya, who used oral pre-exposure prophylaxis (PrEP) for HIV prevention as part of a four-month trial of safety, acceptability and adherence. Fifty-one of 72 volunteers who took part in a randomized, placebo-controlled, blinded trial that compared daily and intermittent dosage of PrEP underwent qualitative assessments after completing the trial. Analyses identified three themes: (i) acceptability of PrEP was high, i.e. side effects were experienced early in the study but diminished over time, however characteristics of pills could improve comfort and use; (ii) social impacts such as stigma, rumors, and relationship difficulties due to being perceived as HIV positive were prevalent; (iii) adherence was challenged by complexities of daily life, in particular post-coital dosing adherence suffered from alcohol use around time of sex, mobile populations, and transactional sex work. These themes resonated across dosing regimens and gender, and while most participants favored the intermittent dosing schedule, those in the intermittent group noted particular challenges in adhering to the post-coital dose. Culturally appropriate and consistent counseling addressing these issues may be critical for PrEP effectiveness.
Journal Article