Non-adherence to urate lowering therapy in gout after 5 years is related to poor outcomes-results from the NOR-Gout study.

OBJECTIVES: Patients with gout need to adhere to medication over time to achieve good outcomes. We assessed self-reported adherence to medication with urate lowering therapy (ULT) 5 years after a treat-to-target intervention and studied how non-adherence was related to baseline demographic and disease variables. METHODS: Patients in the NOR-Gout observational study were included after a recent gout flare and serum urate >360 µmol/L. Patients (mean age 56.2 (S.D. 13.6), 94.5% males, 17.2% with tophi) attended tight-control visits over one year with escalating urate lowering therapy using a treat-to-target strategy. Five-year follow-up included the Medication Adherence Report Scale (MARS-5) questionnaire (range 5-25) for adherence. Flares and SUA target achievement were compared for 5-year adherence to medication. RESULTS: At 5-years most of the 163 patients used ULT (95.1%). MARS-5 adherence scores after 5 years were high (median 24, interquartile range 22-25). Patients in the lowest MARS-5 quartile had, compared to the highest quartile, more often a flare during the last year of follow-up (33.3% vs. 9.5%, P=0.004), and reached the 5-yr serum urate treatment target less frequently (45.2% vs. 87.5%, P<0.001). Baseline lower age (OR 0.56, 95%CI 0.39-0.79), non-European origin (OR 0.22, 95%CI 0.06-0.80), lower SF-36 mental health scores (OR 0.94, 95%CI 0.91-0.98) and less joint pain during last flare (OR 0.73, 95%CI 0.58-0.92) were independent risk factors for non-adherence to medication. CONCLUSIONS: Patients reported after 5 years high adherence to medication. Non-adherence was related to more flares and less urate target achievement. Younger age and non-European origin were associated with non-adherence.

Pattern and predictors of non-adherence to diabetes self-management recommendations among patients in peripheral district of Bangladesh.

OBJECTIVES: This study was designed to determine the extent of non-adherence to the different dimensions of diabetes self-management and to identify the factors influencing non-adherence among peripheral patients in Bangladesh. METHODS: A cross-sectional study was conducted among 990 adult diabetic patients residing in Thakurgaon district, Bangladesh. Data were collected through face-to-face interviews including socio-demographic information, disease and therapeutic, health services, knowledge and adherence to self-management components. RESULTS: The proportion of non-adherence to drug prescription was 66.7%, dietary regimen (68.9%), physical exercise (58.0%), follow-up visit/blood glucose test (88.2%), stopping tobacco (50.6%), and regular foot care (93.9%). Significant predictors for non-adherence to drug were poorest socio-economic status (OR = 2.47), absence of diabetic complications (OR = 1.43), using non-clinical therapy (OR = 5.61), and moderate level of knowledge (OR = 1.87). Non-adherence to dietary recommendations was higher for women (OR = 1.72), poorest socio-economic status (OR = 3.17), and poor technical knowledge (OR = 4.68). Non-adherence to physical exercise was lower for women (OR = 0.62), combined family (OR = 0.63), middle socio-economic status (OR = 0.54), and moderate knowledge on physical exercise (OR = 0.55). Non-adherence to follow-up visits/blood glucose test was higher among patients who did not have diabetic complications (OR = 1.81) and with own transport (OR = 2.57), and respondents from high-income group (OR = 0.23) were less likely to be non-adherent. Non-adherence to stopping tobacco was higher for older individuals (OR = 1.86); but lower for women (OR = 0.48), individuals with higher education level (OR = 0.17) and patients sick for a longer time (OR = 0.52). Non-adherence to foot care was higher for patients who needed longer time to go to hospital (OR = 4.07) and had poor basic knowledge on diabetes (OR = 17.80). CONCLUSION: An alarmingly high proportion of diabetic patients did not adhere to diabetes self-management. Major predictors for non-adherence were related to patient's demographic characteristics and their experience with disease, treatment and health care services.

Validating methods used to identify non-adherence adverse drug events in Canadian administrative health data.

AIMS: Medication non-adherence is a type of adverse drug event that can lead to untreated and exacerbated chronic illness, and that drives healthcare utilization. Research using medication claims data has attempted to identify instances of medication non-adherence using the proportion of days covered or by examining gaps between medication refills. We sought to validate these measures compared to a gold standard diagnosis of non-adherence made in hospital. METHODS: This was a retrospective analysis of adverse drug events diagnosed during three prospective cohorts in British Columbia between 2008 and 2015 (n = 976). We linked prospectively identified adverse drug events to medication claims data to examine the sensitivity and specificity of typical non-adherence measures. RESULTS: The sensitivity of the non-adherence measures ranged from 22.4% to 37.5%, with a proportion of days covered threshold of 95% performing the best; the non-persistence measures had sensitivities ranging from 10.4% to 58.3%. While a 7-day gap was most sensitive, it classified 61.2% of the sample as non-adherent, whereas only 19.6% were diagnosed as such in hospital. CONCLUSIONS: The methods used to identify non-adherence in administrative databases are not accurate when compared to a gold standard diagnosis by healthcare providers. Research that has relied on administrative data to identify non-adherent patients both underestimates the magnitude of the problem and may label patients as non-adherent who were in fact adherent.

Non-Adherence to Anti-Retroviral Therapy Among Adult People Living with HIV in Ethiopia: Systematic Review and Meta-Analysis.

Human immunodeficiency virus remains a global public health problem. Despite efforts to determine the prevalence of non-adherence to ART and its predictors in Ethiopia, various primary studies presented inconsistent findings. Therefore, this review aimed to determine the pooled prevalence of non-adherence to ART and identify its predictors. We have searched PubMed, Google Scholar and Web of Science databases extensively for all available studies. A weighted inverse-variance random-effects model was used to compute the overall non-adherence to ART. The pooled prevalence of non-adherence to ART was 20.68% (95% CI: 17.74, 23.61); I2 = 98.40%; p < 0.001). Educational level of primary school and lower [AOR = 3.5, 95%CI: 1.7, 7.4], taking co-medications [AOR = 0.45, 95%CI: 0.35, 0.59], not using memory aids [AOR = 0.30, 95%CI: 0.13, 0.71], depression [AOR = 2.0, 95%CI: 1.05, 3.79], comorbidity [AOR = 2.12, 95%CI: 1.16, 3.09), under-nutrition [AOR = 2.02, 95%CI: 1.20, 3.43], not believing on ART can control HIV [AOR = 2.31, 95%CI: 1.92, 2.77], lack of access to health facilities [AOR = 3.86, 95%CI: 1.10, 13.51] and taking ART pills uncomfortably while others looking [AOR = 5.21, 95%CI: 2.56, 10.53] were significantly associated with non-adherence to anti-retroviral therapy. The overall pooled prevalence of non-adherence to ART was considerably high in Ethiopia. Educational status, taking co-medications, not using memory aids, depression, comorbidity, under nutrition, not believing on anti-retroviral therapy controls HIV, lack of access to health facilities and taking ART pills uncomfortably were independent predictors of non-adherence to ART in Ethiopia. Therefore, healthcare providers, adherence counselors and supporters should detect non-adherence behaviors and patients' difficulties with ART early, and provide intensive counseling to promote adherence.

Efficacy of the Dapivirine Vaginal Ring Accounting for Imperfect Adherence.

Product adherence is critical to obtaining objective estimates of efficacy of pre-exposure prophylactic interventions against HIV-1 infection. With imperfect adherence, intention-to-treat analyses assess the collective effects of complete, sub-optimal and non-adherence, providing a biased and attenuated estimate of the average causal effect of an intervention. Using data from the MTN-020/ASPIRE phase III trial evaluating HIV-1 efficacy of the dapivirine vaginal ring, we conducted per-protocol, and adherence-adjusted causal inference analyses using principal stratification and marginal structural models. We constructed two adherence cut offs of ≥ 0.9 mg (low cutoff) and > 4.0 mg (high cutoff) that represent drug released from the ring over a 28-day period. The HIV-1 efficacy estimate (95% CI) was 30.8% (3.6%, 50.3%) (P = 0.03) from the per-protocol analysis, and 53.6% (16.5%, 74.3%) (P = 0.01) among the highest predicted adherers from principal stratification analyses using the low cutoff. Marginal structural models produced efficacy estimates (95% CIs) ranging from 48.8 (21.8, 66.4) (P = 0.0019) to 56.5% (32.8%, 71.9%) (P = 0.0002). Application of adherence-adjusted causal inference methods are useful in interpreting HIV-1 efficacy in secondary analyses of PrEP clinical trials.

Antiretroviral therapy non-adherence and its association with psychosocial factors in Nigeria: comparative study of sexual minority and heterosexual men living with HIV.

Sexual minority men (gay, bisexual and other men who have sex with men; SMM) in Nigeria are disproportionately affected by HIV compared to heterosexual men. There is a dearth of research on the correlates of antiretroviral therapy (ART) non-adherence and correlates in both groups. The current study examined the associations of ART non-adherence with sociodemographic and psychosocial characteristics among a sample of Nigerian heterosexual and SMM. Between March and September 2014, we surveyed 120 SMM and 108 heterosexual men receiving ART in Lagos and Abuja, Nigeria. We specified univariate and multivariable linear regression models to examine correlates of ART non-adherence. We found that 50.8% and 29.6% of sexual minority and heterosexual men respectively self-reported ART non-adherence which was significantly associated with psychosocial factors such as stigma, depressive symptoms, and suicidality. Mental health care and psychosocial support should be incorporated into routine HIV care for Nigerian SMM living with HIV.

Medication adherence in pediatric kidney transplantation: How to build a bridge over troubled water.

Adhering to the immunosuppressive regimen remains one of the biggest challenges for children and adolescents after kidney transplantation. The first paper on nonadherence, co-authored by Dr. Fine, appeared in Pubmed over 45 years ago. Since then, many clinicians and researchers tried to better understand nonadherence and are looking for effective ways to support young people in implementing the complex medication regimen in their daily lives. As a tribute to Dr. Fine, we conducted a comprehensive review providing an overview of adherence-enhancing interventions in the field of pediatric kidney transplantation, thereby focusing on strategies that not only are effective but can also be embedded in daily clinical practice successfully and sustainably. This overview is preceded by a discussion about how to find out who is in need of supportive interventions. We will also argue that interventions should already start before pediatric kidney transplantation and discuss how to decide whether or not a young patient with nonadherence-induced graft loss should undergo retransplantation. We hope this comprehensive overview will rekindle the hope that we can finally turn the tide and beat one of pediatric kidney transplantation's main enemies.

Medication non-adherence and predictor factors among adult asthmatic patients in Ethiopia: a systematic review and meta-analysis.

OBJECTIVE: A pronounced burden is evident in individuals with asthma, with approximately half of them not adhering to their prescribed medication. Therefore, this study aimed to assess the pooled prevalence of anti-asthma medications non-adherence in Ethiopia. DATA SOURCES: A comprehensive search was conducted across multiple electronic databases including PubMed, Africa Index Medicus, Science Direct, Hinari, and a search engine, Google Scholar from October 5 to 20, 2023. In addition, digital research repositories from Addis Ababa and Bahir Dar University were accessed. DATA SELECTION: The eligibility criteria was employed to screen studies after uploading search results to EndNote software to remove duplicates first. Then, two investigators, CT and BBT, independently assessed titles, abstracts, and the full text of all retrieved references to identify potentially eligible studies. RESULT: This meta-analysis, which was conducted in Ethiopia, and included 11 full-text articles, revealed a pooled asthma medication non-adherence level of 51.20% (95% CI 35.20%, 67.20%) with substantial heterogeneity (I2 = 99.08%). The review has also identified factors predicting non-adherence among asthmatic patients: free (health service) (AOR: 0.31, 95% CI 0.18-0.54), poor knowledge (AOR: 2.85, 95% CI 1.61-5.05), absence of formal education (AOR: 3.01, 95% CI 1.72-5.25), history of previous ADR (AOR: 8.57, 95% CI 1.12-65.3), and the presence of Co- morbidity(AOR: 3.28, 95% CI 2.014-5.68), had shown association with asthma medication non-adherence. CONCLUSION: Asthma medication non-adherence is notably high in Ethiopia. Addressing medication non-adherence requires a comprehensive approach, including clear communication between healthcare providers, patient education, and addressing financial barriers to ensure better adherence in asthma patients.

Acute kidney injury in lamotrigine-induced DRESS syndrome.

We present a case of lamotrigine-triggered DRESS (drug reaction with eosinophilia and systemic symptoms) syndrome with acute kidney injury stage 3. A 17-year-old girl with known epilepsy treated with lamotrigine presented with acute kidney injury as well as skin eruption, fever, and apathy. Extended diagnostics, considering infectious and autoimmune diseases, remained unremarkable. Lamotrigine blood levels were within the target range. Kidney biopsy showed acute interstitial nephritis with tubular necrosis. Methylprednisolone pulse therapy led to an improvement in kidney function; skin eruption and neurological symptoms resolved. During the hospital stay, the girl admitted to inconsistent and variable intake of lamotrigine, occasionally resulting in notable overdosing. This report demonstrates that acute kidney injury in lamotrigine-induced DRESS syndrome is an acute interstitial nephritis with tubular necrosis, an aspect that has not been deeply characterized so far. Additionally, we aim to elevate awareness towards non-adherence as cause of disease, especially among the adolescent population.

Non-adherence and non-persistence with antiretroviral treatment in Belgium: A real-world evaluation using a pharmacy database, 2018-2021.

PURPOSE: To evaluate the real-world rates of non-adherence and non-persistence to antiretroviral therapy (ART) among treatment-naïve adult patients with HIV after a 12-month follow-up period in Belgium. METHODS: A retrospective analysis of longitudinal pharmacy claims was conducted using the Pharmanet database from January 1, 2018, to December 31, 2021. Non-adherence was assessed over 12 months and reported as the proportion of days covered below the 80% threshold. Non-persistence was defined as the first 90-day gap in treatment between the two types of ART dispensed. Poisson regression with robust standard error and Cox proportional hazard models were used to assess the factors associated with non-adherence and non-persistence, respectively. RESULTS: Overall, 2999 patients were initiated on ART between 2018 and 2021. After a 12-month follow-up, the proportions of non-adherence and non-persistence were 35.6% and 15.9%, respectively in 2018, and decreased to 18.7% and 6.8%, respectively in 2021. Non-adherence was higher among women, Brussels residents, and those receiving multiple-tablet regimens (MTRs). Similarly, the prevalence of non-persistence was higher among women and MTR recipients. CONCLUSION: Among treatment-naïve adults with HIV in Belgium, non-adherence, and non-persistence to ART showed improvement over the study period but remained at high levels. Disparities were observed by sex and between geographical regions. Prioritizing strategies targeting women in Brussels and facilitating the transition from MTRs to single-tablet regimens should be emphasized optimize adherence to ART in Belgium.

Antipsychotic medication non-adherence and factors associated among patients with schizophrenia in eastern Ethiopia.

BACKGROUND: Given that antipsychotic medication is a cornerstone for treating and preventing relapse in people with schizophrenia, non-adherence has been indicated as a big challenge. This study aimed to assess antipsychotic medication non-adherence and factors associated among patients with schizophrenia in eastern Ethiopia. METHODS: We conducted an institution-based cross-sectional study in two public hospitals in Eastern Ethiopia from December 1, 2022, to January 31, 2023. Antipsychotic medication adherence was assessed using MOrisky medication adherence rating scale questionnaire, and insight was measured using the self-report insight scale for Psychosis (ISP). Multiple stepwise logistic regression models with Adjusted Odds Ratio (AOR) and 95% confidence interval (CI) were applied to identify the factors. Statistical significance was considered at p-value ≤ 0.05. RESULTS: We found that 44.57% of patients with schizophrenia experienced non-adherence to their antipsychotic medication. Being single (AOR = 2.48, 95% confidence interval [CI]:1.71, 3.58), alcohol users (AOR = 2.00, 95% confidence interval [CI]:1.46, 2.72), Khat chewers (AOR = 2.84, 95% confidence interval [CI]; 2.06, 3.90) and having no insight to their illness (AOR = 2.1, 95% confidence interval [CI]:1.52, 2.90) were more likely to be non-adherent to their antipsychotic medications. CONCLUSIONS: Our study revealed that antipsychotic medication non-adherence was high among individuals suffering from schizophrenia and that it was influenced by various factors such as single marital status, alcohol usage, Khat chewing, and having no understanding of their condition. As a result, comprehensive intervention methods should be developed to address the factors associated with psychotropic medication non-adherence among patients. Healthcare professionals should pay attention to these aspects and consider developing specific strategies to promote adherence to medications while treating individuals with schizophrenia.

Medication non-adherence and associated factors among peoples with schizophrenia: multicenter cross-sectional study in Northwest Ethiopia.

BACKGROUND: Schizophrenia is a serious and debilitating psychiatric disorder that is linked to marked social and occupational impairment. Despite the vital relevance of medication, non-adherence with recommended pharmacological treatments has been identified as a worldwide problem and is perhaps the most difficult component of treating schizophrenia. There are limited studies conducted on magnitude and potential factors of medication non-adherence among peoples with schizophrenia in Ethiopia. OBJECTIVES: This study aimed to assess medication non-adherence and associated factors among peoples with schizophrenia at comprehensive specialized hospitals in Northwest Ethiopia. METHODS: An institutional-based cross-sectional study was conducted among 387 peoples with schizophrenia at selected hospitals in the Northwest of Ethiopia from June to August 2022. Study participants were enrolled using systematic random sampling. Medication non-adherence was measured using Medication Adherence Rating Scale (MARS). Data entry and analysis were done using Epi-data version 4.6.0 and SPSS version 24, respectively. A multivariable logistic regression model was fitted to identify factors associated with medication non-adherence. Variables with a p-value of < 0.05 at a 95% confidence interval were considered statistically significant. RESULTS: The prevalence of medication non-adherence was 51.2% (95% CI: 46.3, 56.3). Duration of treatment for more than ten years (AOR = 3.76, 95% CI: 1.43, 9.89), substance use (AOR = 1.92, 95% CI: 1.17, 3.13), antipsychotic polypharmacy, (AOR = 2.01, 95% CI: 1.11, 3.63) and extra-pyramidal side effect (AOR = 2.48, 95% CI: 1.24, 4.94) were significantly associated with medication non-adherence. CONCLUSION: In this study, half of the participants were found to be medication non-adherent. Respondents with a longer duration of treatment, substance users, those on antipsychotic polypharmacy, and those who develop extra-pyramidal side effect need prompt screening and critical follow-up to improve medication adherence.

Use and non-adherence to antiretroviral therapy among Refugee HIV positive pregnant mothers aged 18-49 years in Kyangwali refugee camp, Western Uganda.

INTRODUCTION: Refugee HIV positive mothers experience significant obstacles in accessing, utilizing and adhering to antiretroviral therapy (ART). Identifying ART non-adherence can help in the development of interventions aimed at improving adherence and subsequently effectiveness of ART among the refugee mothers. We describe the use and the factors associated with non-adherence to ART among Refugee HIV positive pregnant mothers aged 18-49 years in Kyangwali Refugee Camp, Uganda. METHODS: We conducted a cross-sectional study among HIV positive pregnant mothers aged 18-49 years in Kyangwali refugee camp between May and June 2023. Using a structured questionnaire, we collected data on use, and factors associated with non-adherence to ART. We used modified Poisson regression analysis to determine factors associated with non-adherence to ART. RESULTS: Of the 380 participants enrolled, 192 (50.5%) were married, mean age 32.1 years. Overall, 98.7; 95% Confidence Interval (CI) [97.5-99.8%] were using ART and 27.4; 95% CI [22.9-31.9%] were non-adherent. Non-adherence was associated with: Initiating Prevention of Mother to Child Transmission (PMTCT) care in the third trimester of pregnancy (adjusted Prevalence ration(aPR): 2.06; 95% CI: 1.27-3.35), no need to get permission to seek PMTCT services aPR 1.61; 95% CI [1.07-2.42] and poor attitude of PMTCT providers aPR 1.90; 95% CI [1.20-3.01]. CONCLUSION AND RECOMMENDATIONS: Non-adherence to ART was generally high; therefore limiting the effectiveness of the PMTCT program in this setting. Refugee context specific education interventional programs aimed at early initiation into HIV care, strong social and psychological support from families, communities and health care providers are vital to improve adherence in this setting.

Medication non-adherence and its associated factors among kidney transplant patients in a large teaching hospital in Ethiopia.

BACKGROUND: This study examines medication adherence among kidney transplant patients at St. Paul's Hospital Millennium Medical College (SPHMMC) in Addis Ababa, Ethiopia, focusing on the level of adherence and associated factors to immunosuppressant medicines. METHODS AND MATERIALS: A cross-sectional study was conducted on 270 patients from October 2021 to January 2022 using a structured questionnaire analyzed with SPSS version 26. The prevalence of medication adherence was computed, and a binary logistic regression was fitted to estimate the association. Medication adherence level measurement in post-kidney transplant patients was assessed using the Simplified Medication Adherence Questionnaire (SMAQ) and Basel Adherence Assessment Scale in Immunosuppressants (BAASIS). A 95% confidence interval and p-value < 0.05 were used for statistical significance. RESULTS: The study found that 71.5% of kidney transplant patients were male, with a median age of 37 and a mean duration of 3.55 years. Medication adherence in post-kidney transplant patients was 81.9%. Post-transplant duration above 5 years and missing follow-up visits more than two times was associated with a 92.6% and 91.2% in medication non-adherence rate respectively. Additionally, forgetfulness was associated with a 90.6%, non-adherence level compared to drug unavailability and financial reasons. CONCLUSION AND RECOMMENDATION: The study indicates that our patients exhibit higher medication adherence than WHO-measured levels, suggesting the need for healthcare providers to strengthen their intervention, especially for those above 5 years post-kidney transplant. The reason for increased adherence could be explained by the health education program about the medication name, dosing, frequency of ingestion and adverse effects of the drug, and effects of non-adherence.

Adherence in Atopic Dermatitis.

Atopic dermatitis is a chronic dermatologic condition requiring extended treatment times with topical application of medications. While atopic dermatitis treatments can be highly effective when used as directed, oftentimes patients do not respond as expected, raising concern for nonadherence versus nonresponse. This chapter aims to describe what is currently known about adherence in atopic dermatitis and to discuss strategies to improve adherence in order to improve treatment outcomes. Whether intentional or unintentional, nonadherence to treatment can limit patient outcomes of this disease for a variety of reasons. These include frustration with medication efficacy, inconvenience, and fear of side effects. Other factors include forgetfulness, financial burden of treatment, lack of trust in the physician, dislike of prescribed medication, or lack of understanding of disease or treatment. Several interventions have been studied with the aim of improving adherence in atopic dermatitis-such as educational workshops for patients and caregivers, earlier follow-up visits, and text messages reminders-however, these are often limited by sample size and power. Further research is needed to study both specific patterns of nonadherence in atopic dermatitis, as well as methods to improve them.

Mid-term results of "off-label" use of the Endurant stentgraft in patients with infrarenal abdominal aortic aneurysms.

OBJECTIVES: EVAR is the preferred treatment modality for patients with an infrarenal abdominal aortic aneurysm with suitable anatomy. Each manufacturer of aortic stentgrafts has specific anatomic requirements. In some patients, it is not possible to adhere to the instructions for use, but alternative treatment is also not possible. In these patients, EVAR can be performed outside instructions for use. METHODS: In this study, all consecutive patients in whom an Endurant II or IIS stentgraft was used between 1 January and 31 December were reviewed. We compared the two patient groups in whom this stentgrafts was used outside and inside instructions for use. Patients with planned adjuvant therapy, for example, chimney procedure or iliac side branches, were excluded. RESULTS: In 74 of 178 (41.6%) patients, the instructions for use were not adhered. The main reason was pathology of the aortic neck. There were more patients with type IA endoleak, this difference was borderline significant (p = .06). There were more patients with limb occlusion in the early postoperative period, but at the end of the follow-up period, the incidence was comparable. Aneurysm-related mortality and all-cause mortality were comparable in both groups. CONCLUSION: In this study, real-life experience with the Endurant II and IIS stentgraft is described. Non-adherence with instructions for use was associated with a higher risk of endoleak type IA (p = .06). In the early postoperative period, there were more patients with limb occlusion; this finding was not observed anymore at the end of the follow-up period.

Medium-term exposure to size-fractioned particulate matter and asthma exacerbations in China: A longitudinal study of asthmatics with poor medication adherence.

BACKGROUND: Studies have shown that short- and long-term exposure to particulate matter (PM) can increase the risk of asthma morbidity and mortality. However, the effect of medium-term exposure remains unknown. We aim to examine the effect of medium-term exposure to size-fractioned PM on asthma exacerbations among asthmatics with poor medication adherence. METHODS: We conducted a longitudinal study in China based on the National Mobile Asthma Management System Project that specifically and routinely followed asthma exacerbations in asthmatics with poor medication adherence from April 2017 to May 2019. High-resolution satellite remote-sensing data were used to estimate each participant's medium-term exposure (on average 90 days) to size-fractioned PM (PM1, PM2.5, and PM10) based on the residential address and the date of the follow-up when asthma exacerbations (e.g., hospitalizations and emergency room visits) occurred or the end of the follow-up. The Cox proportional hazards model was employed to examine the hazard ratio of asthma exacerbations associated with each PM after controlling for sex, age, BMI, education level, geographic region, and temperature. RESULTS: Modelling results revealed nonlinear exposure-response associations of asthma exacerbations with medium-term exposure to PM1, PM2.5, and PM10. Specifically, for emergency room visits, we found an increased hazard ratio for PM1 above 22.8 µg/m3 (1.060, 95 % CI: 1.025-1.096, per 1 µg/m3 increase), PM2.5 above 38.2 µg/m3 (1.032, 95 % CI: 1.010-1.054), and PM10 above 78.6 µg/m3 (1.019, 95 % CI: 1.006-1.032). For hospitalizations, we also found an increased hazard ratio for PM1 above 20.3 µg/m3 (1.055, 95 % CI: 1.001-1.111) and PM2.5 above 39.2 µg/m3 (1.038, 95 % CI: 1.003-1.074). Furthermore, the effects of PM were greater for a longer exposure window (90-180 days) and among participants with a high BMI. CONCLUSION: This study suggests that medium-term exposure to PM is associated with an increased risk of asthma exacerbations in asthmatics with poor medication adherence, with a higher risk from smaller PM.

Predictors, mortality, and health outcomes of intensive phase non-adherence to a regimen in patients with drug-susceptible tuberculosis: a nationwide linkage database.

OBJECTIVES: The clinical importance of adhering to the regimen in tuberculosis patients has been widely investigated, but most studies were conducted in controlled settings and in limited populations. We aimed to measure the level of real-world adherence during intensive phase and investigate the predictors and the risk of mortality and health outcomes of intensive phase non-adherence in tuberculosis patients. STUDY DESIGN: We conducted a nationwide cohort study by linking the Korean National Tuberculosis Surveillance System and the National Health Information Database. METHODS: We included all incident drug-susceptible tuberculosis patients who initiated the regimens recommended by the World Health Organization from 2013 to 2018. Adherence was measured using the proportion of days covered (poor [<50%], moderate [50%-79%], and high [≥80%]). We used logistic regression model to assess predictors and the Cox proportional hazard model to evaluate the risk of mortality and health outcomes with intensive phase non-adherence. RESULTS: Of 46,818 patients, there were 8% and 11% with poor and moderate adherent groups, respectively. Age ≥45 years, insulin use, and history of renal failure were predictors of non-adherence. Compared with high adherent group, poor and moderate adherent groups were associated with a substantial risk of mortality (poor: hazard ratio, 2.14 [95% confidence interval, 1.95-2.34]; moderate: 1.76 [1.62-1.92]). Similar trends were observed for health outcomes. Stratified analyses showed a higher risk of mortality in patients with medical aid, low income, and history of renal failure, systematic corticosteroids, and immunomodulators. CONCLUSIONS: Non-adherence during intensive phase increased mortality risk by twofold, underscoring targeted intervention for high-risk population, including advanced diabetes, and immunocompromised patients.

Treatment non-adherence among methadone maintenance patients and associated factors: a multicenter, cross-sectional study in Vietnam.

OBJECTIVE: This multicenter, cross-sectional study was conducted to investigate the prevalence of treatment non-adherence and its associated factors among methadone maintenance patients in Vietnam. METHODS: This secondary data analysis was conducted using the data from a previous study. Six hundred patients were interviewed face-to-face to collect data on their demographic characteristics and social support. Information about the treatment characteristics and patients' non-adherence was gathered from medical records and books monitoring their treatment process. Treatment non-adherence was defined as missing at least one methadone dose in the last three months. RESULTS: The overall prevalence of non-adherence was 45.7%. The average social support score of patients who completely adhered to treatment was significantly higher than that of those who did not (p < 0.001). In the multivariate logistic regression model, for each one-unit increase in social support (one score), treatment time (a year), and patient's monthly income (one million Vietnam dongs), the odds of non-adherence decreased by 28% (aOR = 0.72, 95%CI 0.59-0.88, p = 0.002), 15% (aOR = 0.85, 95%CI 0.80-0.91, p < 0.001) and 9% (aOR = 0.91, 95%CI 0.85-0.97, p = 0.004), respectively. Patients living in Son La (a mountainous province) were 1.72 times (95%CI 1.09-2.71) more likely to be non-adherent as compared to those in other areas (p = 0.020). As per univariate analyses, other associated factors could be age, education level, family monthly income, occupation, and opioid relapse (p < 0.001). CONCLUSIONS: A high non-adherence rate was found among Vietnamese methadone maintenance patients. Interventions involving social support, occupation, income, and education are needed to improve their treatment adherence.

Adherence to secondary stroke prevention medications in Singapore: a single center study.

OBJECTIVES: Recurrent strokes are associated with greater disability and mortality than first-time strokes. However, adherence to secondary stroke prevention medications has been reported to be suboptimal. We assessed medication adherence to antihypertensives, antiplatelets, and statins after acute ischemic stroke and identified factors associated with non-adherence behavior to each drug class. METHODS: This single center study is an extension of a larger prospective cohort study of ischemic stroke patients assessed at an outpatient post stroke clinic. Medication adherence behavior and medication knowledge was determined by direct questioning, and perceptions towards medications via the Beliefs about Medicines Questionnaire. Factors associated with non-adherence in each drug class were determined using logistic regression. RESULTS: Rates of adherence differed between antihypertensives (77.9%), antiplatelets (80.3%), and statins (64.7%) (p < 0.001) amongst the 193 patients surveyed. Non-adherence to antihypertensives was associated with living alone, taking < 5 medications, and stronger beliefs that medications are harmful. For antiplatelets, non-diabetic patients and patients with stronger beliefs that medications are harmful were more likely to be non-adherent. Patients non-adherent to statins were more likely to have a longer time since ischemic event and have a transient ischemic attack as the index event. CONCLUSIONS: Overall, medication adherence behavior to secondary stroke prevention medications was poor, with statins the least adhered to. Factors associated with non-adherence to each drug class could guide the development of tailored interventions to improve adherence to secondary stroke prevention medications.