Predictors of asthma medication nonadherence

Prevalence and predictors of medication adherence among adolescents and adults with asthma in Ethiopia: a systematic review and meta-analysis

OBJECTIVE

This review aimed to estimate the pooled prevalence and predictors of medication adherence among adolescents and adults with asthma in Ethiopia.

DATA SOURCES

Primary studies were searched from PubMed, Scopus, HINARI, and Google Scholar from January 1, 2010 to December 10, 2023. In addition, we have used citation tracking.

STUDY SELECTIONS

Observational studies (cross sectional, case control, and cohort) conducted among asthmatic patients ≥15 years old in Ethiopia, published in English language were included. After screening, the studies were assessed using Joanna Briggs Institute (JBI) critical appraisal tool and data were extracted using a checklist. Heterogeneity was assessed using forest plot, Q-statistics and I2.

RESULTS

The review was performed among 13 institution-based studies with a total of 2901 participants with asthma. About 1058 participants had comorbid disease and 354 were cigarette smokers. The pooled prevalence of adherence to medications among patients with asthma was 40.50% (95% CI: 28.05, 52.96; p value < 0.001) with high heterogeneity (I2 = 98.25%, p < 0.001). Getting health education about asthma and having comorbid disease were predictors of medication adherence among adolescents and adults with asthma in Ethiopia.

CONCLUSIONS

The pooled prevalence of medication adherence among adolescents and adults with asthma in Ethiopia is low and indicated that three out of five adolescents and adults with asthma were non-adherent to medications. This implies the Ministry of Health should develop different strategies to improve medication adherence including patient education and strengthening the health care system. Multicenter longitudinal studies should be further conducted by using objective methods of adherence measurement and large sample size.

Effect of an Asthma Exacerbation on Medication Adherence

BACKGROUND

Few studies have looked at the effect of an asthma exacerbation on asthma medication adherence.

OBJECTIVE

To measure asthma medication adherence in the 12 months after an asthma exacerbation and the influence of care type (specialist vs primary care provider) as well as social economic status on adherence.

METHODS

We measured portion of days covered (PDC) during the 12 months before and after an exacerbation in a cohort of patients with asthma who were aged 18 years and older. Subanalyses looked at PDC in those who had more than one exacerbation after the sentinel exacerbation, by type of care received (primary care, allergist or pulmonologist, or no care) during both periods and by socioeconomic status (SES), defined as the lower quartile of annual income for the group.

RESULTS

In a cohort of 1,697 patients, PDC improved significantly (from 0.44 to 0.53; P < .001) after an asthma exacerbation. Improvement in PDC was even greater (from 0.45 to 0.57; P < .001) if they had more than one exacerbation after the sentinel exacerbation. Being seen by a specialist after the exacerbation but not before it, resulted in the greatest improvement in PDC (0.17 mean change). Patients not seen by a specialist either before the exacerbation or after had a mean change of just 0.07. Those with a lower SES had an overall lower PDC before the exacerbation (0.37 vs 0.43) but saw a similar improvement in the PDC compared with those in a higher SES (0.09 vs 0.10).

CONCLUSIONS

An asthma exacerbation is associated with a significant and sustained effect on medication adherence.

Factors associated with medication adherence among adults with asthma

OBJECTIVE

Asthma medication adherence is of crucial importance for successful disease management. The aim of this study was to identify and rank factors associated with medication adherence among adults with asthma in the general population.

METHODS

We used data on physician-diagnosed asthma, medication adherence, and factors associated with asthma medication adherence from the Danish General Suburban Population Study using a cross-sectional study design. We ranked factors associated with asthma medication adherence based on the magnitude of odds ratios, and the population attributable fractions.

RESULTS

Among 20,032 individuals from the general population, 1,128 (6%) suffered from asthma and 822 (73%) of these were adherent to asthma medications. Based on odds ratios, the three top-ranked factors associated with asthma medication adherence were asthma attacks within the past year (4.0; 95% CI: 2.9-5.5), allergy medication use (3.8; 2.6-5.6), and age above median (3.4; 2.4-4.7), followed by asthma severity markers like airway obstruction, and coughing with mucus. Based on population attributable fractions, the three top-ranked factors associated with adherence to asthma medications were asthma attacks within the past year (70%), age above median (57%), and use of allergy medication (49%).

CONCLUSIONS

The study showed that in the general population recent asthma attacks, higher age, and taking allergy medication were the three most important factors associated with asthma medication adherence. The importance of maintaining adherence to asthma medications even in the absence of severe disease or expressed asthma symptoms should be better communicated to the general population.

Determining factors associated with inhaled therapy adherence on asthma and COPD: A systematic review and meta-analysis of the global literature

BACKGROUND

Adherence to therapy has been reported worldwide as a major problem, and that is particularly relevant on inhaled therapy for Asthma and Chronic Obstructive Pulmonary Disease (COPD), considering its barriers and features. We reviewed the global literature reporting the main determinants for adherence on these patients.

METHODS

Searches were made using the Cochrane Library, MEDLINE, EMBASE and ISI Web of Science databases. Analytical, observational and epidemiological studies (cohort, case-control and cross-sectional studies) were included, reporting association between any type of determinant and the adherence for inhaler therapy on Asthma or COPD. Random-effects meta-analysis were used to summarise the numerical effect estimates.

RESULTS

47 studies were included, including a total of 54.765 participants. In meta-analyses, the significant determinants of adherence to inhaled therapy were: older age [RR = 1.07 (1.03-1.10); I² = 94; p < 0.0001] good disease knowledge/literacy [RR = 1.37 (1.28-1.47); I² = 14; p = 0.33]; obesity [RR = 1.30 (1.12-1.50); I² = 0; p = 0.37]; good cognitive performance [RR = 1.28 (1.17-1.40); I² = 0; p = 0.62]; higher income [RR = 1.63 (1.05-2.56); I² = 0; p = 0.52]; being employed [RR = 0.87 (0.83-0.90); I² = 0; p = 0.76] and using multiple drugs/inhalers [RR = 0.81 (0.79-0.84); I² = 0; p = 0.80]. Overall, the strength of the underlying evidence was only low to moderate.

CONCLUSIONS

Many determinants may be associated to patient's adherence, and personalised interventions should be taken in clinical practice to address it by gaining an understanding of their individual features.

The mediating role of trust in physician and self-efficacy in understanding medication adherence in severe asthma

OBJECTIVE

To investigate the relationships between beliefs about medication, trust in physician, self-efficacy, and medication adherence in severe asthma patients.

METHODS

A sample of 117 patients with a diagnosis of Severe Asthma on Step 4 or 5 of GINA assessment of control treatment ladder completed a one-time survey, including the shortened Medication Adherence Report Scale (MARS-5), Beliefs about Medicines Questionnaire (BMQ), Trust in Physician Scale (TIPS), and Self-Efficacy in Taking Medication (SEAMS).

RESULTS

Our study found that medication adherence was associated with trust in physician (p = 0.033); factor one of beliefs about medication - Necessity of taking medication (BMQ1-Necessity: p = 0.025); and two factors of self-efficacy in taking medication (SEAMS1-Difficulty: p = 0.001; SEAMS2-Uncertain: p = 0.005). Furthermore, two factors of self-efficacy and trust in physician together significantly mediated the relationship between beliefs about medication and medication adherence in a serial multiple mediator model.

CONCLUSIONS

Beliefs about medication are fundamental in affecting asthma patients' trust in physician and self-efficacy, which in turn impact medication adherence.

CLINICAL IMPLICATIONS

Interventions being developed to improve medication adherence may benefit from emphasizing on asthma patients' concerns about overuse and harm of medication. In addition, education program targeting to improve provider-patient relationship could help with patients' confidence in taking medication.

Manifesto on the overuse of SABA in the management of asthma: new approaches and new strategies

The risks of overusing short-acting β₂-agonists (SABA), including an increase in asthma-related deaths, are many and well known. The Global Initiative on Asthma (GINA) 2019 and 2020 updates recommend as-needed inhaled corticosteroid (ICS)/formoterol as the preferred rescue medication in mild asthma as monotherapy and also in moderate to severe asthma when the maintenance and reliever therapy (MART) strategy is used. Using SABA for symptom relief, however, was the standard of treatment for many years, and consequently this practice persists, particularly in patients not taking ICS regularly. Here, we examine the rationale for this shift from a long-standing recommendation for as-needed SABA treatment to the use of as-needed ICS/formoterol and consider clinical evidence on strategies for asthma treatment and patient management.

Asthma medication use in obese and healthy weight asthma: systematic review/meta-analysis

BACKGROUND

Obesity is a common comorbidity in asthma and associated with poorer asthma control, more frequent/severe exacerbations, and reduced response to asthma pharmacotherapy.

OBJECTIVE

This review aims to compare use of all classes of asthma medications in obese (body mass index (BMI) ≤30 kg·m^-2) versus healthy-weight (BMI <25 kg·m^-2) subjects with asthma.

DESIGN

Databases including CINAHL (Cumulative Index to Nursing and Allied Health Literature), Cochrane, Embase and MEDLINE were searched up to July 2019 for English-language studies that recorded medication use or dose in obese and healthy-weight adults with asthma. A critical appraisal checklist was utilised for scrutinising methodological quality of eligible studies. Meta-analysis was performed and heterogeneity was examined with the use of the Chi-squared test. This review was conducted based on a published protocol (www.crd.york.ac.uk/PROSPERO CRD42020148671).

RESULTS

Meta-analysis showed that obese subjects are more likely to use asthma medications, including short-acting β₂-agonists (OR 1.75, 95% CI 1.17-2.60; p=0.006, I²=41%) and maintenance oral corticosteroids (OR 1.86, 95% CI 1.49-2.31; p<0.001, I²=0%) compared to healthy-weight subjects. Inhaled corticosteroid (ICS) dose (µg·day^-1) was significantly higher in obese subjects (mean difference 208.14, 95% CI 107.01-309.27; p<0.001, I²=74%). Forced expiratory volume in 1 s (FEV₁) % predicted was significantly lower in obese subjects (mean difference -5.32%, 95% CI -6.75--3.89; p<0.001, I²=42%); however, no significant differences were observed in FEV₁/forced vital capacity (FVC) ratio between groups.

CONCLUSIONS

We found that obese subjects with asthma have higher use of all included asthma medication classes and higher ICS doses than healthy-weight asthma subjects, despite lower FEV₁ and a similar FEV₁/FVC %. A better understanding of the factors driving increased medication use is required to improve outcomes in this subgroup of asthmatics.

Determinants of non-adherence to inhaled steroids in adult asthmatic patients on follow up in referral hospital, Ethiopia: cross-sectional study

Background

Asthma is one of the major non-communicable diseases worldwide. The prevalence of asthma has continuously increased over the last five decades, resulting in 235 million people suffering from it. One of the main challenges in asthma control is adherence to pharmaceutical treatment (4) and leads to poor outcome and increases the economic and clinical burden. Non-adherence could be intentional or non-intentional.

Objective

To identify the determinants of inhaled steroid adherence among adult asthmatic patients.

Setting

The study was done in Jimma university medical center (JUMC) from March-August 22/2018.

Method

Cross-sectional observational study was conducted. Patient assessment was conducted (patient demography, inhalation technique, adherence, and asthma control status). Independent predictors of outcome identified and strength of association between dependent and independent variables determined by using binary logistic regression and statistical significance was considered at p < 0.05. Before computing binary logistic regression analysis, the presence of colinearity between independent factor and model fitness was checked.

Results

One hundred forty patients were included in the analysis. Substantial number of patients 53(37.9, 95%CI: 30-45) were non-adherent. Patient experience of previous adverse drug reaction (p = 0.011), educational status (p = 0.02), patient knowledge status (p = 0.028), previous education (p = 0.0001) and co-morbidity (p = 0.031) were significantly associated with adherence.

Conclusions

The rate of non-adherence to inhalational anti-asthmatics is high and different factors contributed. The health care provider should try to counsel patients about the effect of non-adherence on asthma control. Reassurance concerning adverse drug reactions should be an integral part of patient counseling.

"I did not know it was so important to take it the whole time" - self-reported barriers to medical treatment among individuals with asthma

BACKGROUND

Asthma is an extensive public health problem and inadequate disease control is not uncommon. Individuals' self-perceived barriers to medical treatment for the entire treatment chain (from seeking care for symptoms to using a medicine) have seldom been studied for chronic diseases such as asthma. The aim of this study was to explore self-perceived barriers to medical treatment among individuals with asthma within the framework of AAAQ (availability, accessibility, acceptability and quality).

METHODS

Individuals with asthma visiting the asthma nurse at a primary health care centre, and who currently had a prescription for anti-asthmatic medicines, were informed about the study. The nurse asked the persons for their consent to be contacted by an interviewer. The interview guide was constructed from the elements of AAAQ exploring self-perceived barriers to asthma treatment. Interviews were conducted in Swedish, English, Arabic and Persian. They were transcribed verbatim and a manifest content analysis was conducted.

RESULTS

Fourteen interviews were conducted. There was a large variation in both age and reported number of years with asthma. Self-perceived barriers to asthma treatment were experienced throughout the whole treatment chain. Barriers that emerged were health care accessibility, perceived quality of care, beliefs about medicines, life circumstances, knowledge gap about asthma and medicines, practical obstacles to using medicines, and experiences with treatment. The self-perceived barriers cover all four elements of AAAQ, but there are also some barriers that go beyond those elements (life circumstances and practical obstacles to using medicines).

CONCLUSIONS

Self-perceived barriers among individuals with asthma cover the whole treatment chain. We want to highlight the inadequate information/education of patients leading to knowledge gaps about both disease and the effect of medicines, and also the perceived unsatisfactory treatment at the PHCC, which could partly be counteracted if patients know what to expect from health care visits.

The use of motivational interviewing in improving medication adherence for individuals with asthma: a systematic review

OBJECTIVE:

This review was conducted to examine current literature on the use of motivational interviewing (MI) as a strategy to promote individuals with asthma to make behavioral changes and improve health outcomes. This article systematically reviews empirical MI studies which were used to promote asthma medication adherence in children, adolescents, and adults.

METHODS:

Studies were obtained from several databases. We searched CINAHL, MEDLINE, PyscINFO, PubMed, and Cochrane database for articles on the use of MI to improve asthma medication adherence in individuals diagnosed with moderate to severe asthma. Various combinations of the following search terms were used: motivational interviewing, asthma, medication adherence, medication non-adherence, and MI.

RESULTS:

MI intervention showed evidence of improved self-efficacy, asthma, self-management, and positive behavior change for individuals diagnosed with asthma. The results suggest that MI is a feasible and promising approach to improve attitudes toward asthma medication adherence.

CONCLUSION:

The generally favorable results indicate MI merged with other interventions and support is effective in improving medication adherence and is also more sustainable than MI as a stand-alone intervention. Additional research is necessary to assess the effectiveness of MI in ensuring individuals fill their prescriptions and use their medications as recommended.

Factors associated with adherence to asthma treatment with inhaled corticosteroids: A cross-sectional exploratory study

BACKGROUND

Understanding factors at the patient, provider or organizational level associated with inhaled corticosteroids (ICSs) adherence is important when planning adherence-enhancing interventions.

OBJECTIVE

To explore factors associated with adherence to ICS among patients with asthma aged 12-45 years.

METHODS

A cross-sectional study was conducted among patients with asthma reporting ICS prescription during the baseline interview of an intervention study. Three methods were used to measure ICS adherence: a 4-item self-report questionnaire, a single question (SQ) measuring past 7-day exposure to ICS and a medication possession ratio (MPR, i.e., the sum of ICS days of supply/365). We assessed 46 potential factors of ICS adherence derived from the Predisposing, Reinforcing and Enabling Constructs in Educational Diagnosis and Evaluation (PRECEDE) model. Their association with ICS adherence was measured using multivariate logistic regressions.

RESULTS

Among the 319 participants included, 16.0% were deemed adherent according to the 4-item questionnaire. This proportion was 43.0% and 9.1% for the SQ and the MPR method, respectively. Ten factors were associated with good ICS adherence. Among these factors, four were associated with adherence through one of the measuring methods: a low family income level, a high number of asthma drugs used, a good knowledge of asthma pathophysiology and the perception that following the ICS prescription was easy. Two factors emerged through more than one measure: perceiving asthma severity as moderate to very severe and perceiving a high risk of death if ICSs are not taken as prescribed.

CONCLUSION

ICS adherence was poor in those individuals with asthma. Future adherence-enhancing interventions could target the identified modifiable risk factors.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier NCT02093013.

Asthma inhaler adherence determinants in adults: systematic review of observational data

Nonadherence to inhaled medication leads to poor asthma control and increased healthcare utilisation. Many studies exploring adherence determinants have been conducted, but summaries of the evidence are scarce. We performed a systematic review of observational research on determinants of asthma inhaler adherence among adults. We searched for articles in English reporting quantitative observational studies on inhaler adherence correlates among adults in developed countries, published in EMBASE, Medline, PsychInfo and PsychArticles in 1990-2014. Two coders independently assessed eligibility and extracted data, and assessed study quality. Results were summarised qualitatively into social and economic, and healthcare-, therapy-, condition- and patient-related factors. The 51 studies included mainly examined patient-related factors and found consistent links between adherence and stronger inhaler-necessity beliefs, and possibly older age. There was limited evidence on the relevance of other determinants, partly due to study heterogeneity regarding the types of determinants examined. Methodological quality varied considerably and studies performed generally poorly on their definitions of variables and measures, risk of bias, sample size and data analysis. A broader adoption of common methodological standards and health behaviour theories is needed before cumulative science on the determinants of adherence to asthma inhalers among adults can develop further.

Does personality influence how people with asthma manage their condition?

OBJECTIVE

Personality traits have been found to be associated with the management of chronic disease, however, there is limited research on these relationships with respect to asthma. Asthma management and asthma control are often suboptimal, representing a barrier to patients achieving good health outcomes. This explorative study aimed to investigate the relationship between correlates of asthma management and personality traits.

METHODS

Participants completed a postal survey comprising validated self-report questionnaires measuring personality traits (neuroticism, extraversion, openness to experiences, agreeableness, conscientiousness), asthma medication adherence, asthma control and perceived control of asthma. Relationships between asthma management factors and personality traits were examined using correlations and regression procedures.

RESULTS

A total of 77 surveys were returned from 94 enrolled participants. Significant relationships were found between personality traits and (i) adherence to asthma medications, and (ii) perceived control of asthma. Participants who scored high on the conscientiousness dimension of personality demonstrated higher adherence to their asthma medications. Women who scored low on the agreeableness dimension of personality and high on the neuroticism dimension had significantly lower perceived confidence and ability to manage their asthma. No statistically significant associations were found between asthma control and personality traits.

CONCLUSIONS

Three of the five personality traits were found to be related to asthma management. Future research into the role of personality traits and asthma management will assist in the appropriate tailoring of interventional strategies to optimize the health of patients with asthma.

Relationship between medication beliefs, self-reported and refill adherence, and symptoms in patients with asthma using inhaled corticosteroids

BACKGROUND

Beliefs play a crucial role in medication adherence. Interestingly, the relationship between beliefs and adherence varies when different adherence measures are used. How adherence, in turn, is related to asthma symptoms is still unclear. Our aim was to investigate the relationship between beliefs (ie, necessities and concerns) about inhaled corticosteroids (ICS) and subjectively as well as objectively measure adherence and the agreement between these measures. Further, the relationship between adherence and asthma symptoms was examined.

METHODS

A total of 280 patients aged 18-80 years who filled at least two ICS prescriptions in the preceding year were recruited to complete a questionnaire. The questionnaire included the Beliefs about Medicines Questionnaire to assess necessity beliefs and concerns about ICS, four questions about ICS use to measure self-reported adherence, and the Asthma Control Questionnaire to assess asthma symptoms. Proportion of days covered was used to determine pharmacy refill adherence.

RESULTS

Data from 93 patients with asthma were analyzed. Necessities were positively related to self-reported adherence (P = 0.01). No other associations were found between beliefs and subjective or objective adherence. There was no correlation between self-reported and refill adherence. Participants were significantly (P < 0.001) less adherent according to self-report data (24.4%) than according to pharmacy data (57.8%). No relationship was found between adherence and asthma symptoms.

CONCLUSION

Higher necessities are associated with higher self-reported adherence, suggesting that it could be more important to focus on necessities than on concerns in an attempt to improve adherence. Self-reported and refill adherence measurements cannot be used interchangeably. No relationship between adherence and asthma symptoms was found.

Environment and asthma in adults

The present review addresses recent advances and especially challenging aspects regarding the role of environmental risk factors in adult-onset asthma, for which the causes are poorly established. In the first part of the review, we discuss aspects regarding some environmental risk factors for adult-onset asthma: air pollution, occupational exposures with a focus on an emerging risk represented by exposure to cleaning agents (both at home and in the workplace), and lifestyle and nutrition. The second part is focused on perspectives and challenges, regarding relevant topics on which research is needed to improve the understanding of the role of environmental factors in asthma. Aspects of exposure assessment, the complexity of multiple exposures, the interrelationships of the environment with behavioral characteristics and the importance of studying biological markers and gene-environment interactions to identify the role of the environment in asthma are discussed. We conclude that environmental and lifestyle exposures play an important role in asthma or related phenotypes. The changes in lifestyle and the environment in recent decades have modified the specific risk factors in asthma even for well-recognized risks such as occupational exposures. To better understand the role of the environment in asthma, the use of objective (quantitative measurement of exposures) or modern tools (bar code, GPS) and the development of multidisciplinary collaboration would be very promising. A better understanding of the complex interrelationships between socio-economic, nutritional, lifestyle and environmental conditions might help to study their joint and independent roles in asthma.

A personality and gender perspective on adherence and health-related quality of life in people with asthma and/or allergic rhinitis

PURPOSE

Poor adherence to medication treatment for asthma and allergic rhinitis could challenge a positive health outcome. Health-related quality of life (HRQL) is an important measure of health outcome. Both personality and gender could influence adherence and perceptions of HRQL. The purpose was to clarify the role of personality and gender in relation to adherence and HRQL in people with asthma and/or rhinitis.

DATA SOURCES

Participants (n = 180) with asthma and allergic rhinitis, selected from a population-based study, filled out questionnaires on the five-factor model personality traits--neuroticism, extraversion, openness to experience, agreeableness, and conscientiousness--HRQL, and adherence to medication treatment. Data were statistically analyzed using t-tests, Mann-Whitney tests, bivariate correlations, and multiple regressions.

CONCLUSIONS

Personality traits were associated with adherence to medication treatment in men. The influence of personality traits on HRQL also differed between men and women. These differences suggest that both a personality and gender perspective should be considered when planning care support aimed at improving adherence and HRQL in people living with asthma and/or allergic rhinitis.

IMPLICATIONS FOR PRACTICE

It is suggested that both a personality and gender perspective be taken into account in care support aimed at improving adherence and HRQL in people with asthma and allergic rhinitis.

The effects of indoor environmental exposures on pediatric asthma: a discrete event simulation model

BACKGROUND

In the United States, asthma is the most common chronic disease of childhood across all socioeconomic classes and is the most frequent cause of hospitalization among children. Asthma exacerbations have been associated with exposure to residential indoor environmental stressors such as allergens and air pollutants as well as numerous additional factors. Simulation modeling is a valuable tool that can be used to evaluate interventions for complex multifactorial diseases such as asthma but in spite of its flexibility and applicability, modeling applications in either environmental exposures or asthma have been limited to date.

METHODS

We designed a discrete event simulation model to study the effect of environmental factors on asthma exacerbations in school-age children living in low-income multi-family housing. Model outcomes include asthma symptoms, medication use, hospitalizations, and emergency room visits. Environmental factors were linked to percent predicted forced expiratory volume in 1 second (FEV1%), which in turn was linked to risk equations for each outcome. Exposures affecting FEV1% included indoor and outdoor sources of NO2 and PM2.5, cockroach allergen, and dampness as a proxy for mold.

RESULTS

Model design parameters and equations are described in detail. We evaluated the model by simulating 50,000 children over 10 years and showed that pollutant concentrations and health outcome rates are comparable to values reported in the literature. In an application example, we simulated what would happen if the kitchen and bathroom exhaust fans were improved for the entire cohort, and showed reductions in pollutant concentrations and healthcare utilization rates.

CONCLUSIONS

We describe the design and evaluation of a discrete event simulation model of pediatric asthma for children living in low-income multi-family housing. Our model simulates the effect of environmental factors (combustion pollutants and allergens), medication compliance, seasonality, and medical history on asthma outcomes (symptom-days, medication use, hospitalizations, and emergency room visits). The model can be used to evaluate building interventions and green building construction practices on pollutant concentrations, energy savings, and asthma healthcare utilization costs, and demonstrates the value of a simulation approach for studying complex diseases such as asthma.

The influence of personality traits and beliefs about medicines on adherence to asthma treatment

AIM

To explore the influence of personality traits and beliefs about medicines on adherence to treatment with asthma medication.

METHODS

Respondents were 35 asthmatic adults prescribed controller medication. They answered questionnaires about medication adherence, personality traits, and beliefs about medicines.

RESULTS

In gender comparisons, the personality traits "Neuroticism" in men and "adherence to medication" were associated with lower adherent behaviour. Associations between personality traits and beliefs in the necessity of medication for controlling the illness were identified. Beliefs about the necessity of medication were positively associated with adherent behaviour in women. In the total sample, a positive "necessity-concern" differential predicted adherent behaviour.

CONCLUSION

The results imply that personality and beliefs about medicines may influence how well adults with asthma adhere to treatment with asthma medication.

Depression and medication adherence in the treatment of chronic diseases in the United States: a meta-analysis

OBJECTIVE

To conduct a meta-analysis of the association between depression and medication adherence among patients with chronic diseases. Poor medication adherence may result in worse outcomes and higher costs than if patients fully adhere to their medication regimens.

DATA SOURCES

We searched the PubMed and PsycINFO databases, conducted forward searches for articles that cited major review articles, and examined the reference lists of relevant articles.

STUDY ELIGIBILITY CRITERIA, PARTICIPANTS, AND INTERVENTIONS

We included studies on adults in the United States that reported bivariate relationships between depression and medication adherence. We excluded studies on special populations (e.g., substance abusers) that were not representative of the general adult population with chronic diseases, studies on certain diseases (e.g., HIV) that required special adherence protocols, and studies on interventions for medication adherence.

STUDY APPRAISAL AND SYNTHESIS METHODS

Data abstracted included the study population, the protocol, measures of depression and adherence, and the quantitative association between depression and medication adherence. Synthesis of the data followed established statistical procedures for meta-analysis.

RESULTS

The estimated odds of a depressed patient being non-adherent are 1.76 times the odds of a non-depressed patient, across 31 studies and 18,245 participants. The association was similar across disease types but was not as strong among studies that used pharmacy records compared to self-report and electronic cap measures.

LIMITATIONS

The meta-analysis results are correlations limiting causal inferences, and there is some heterogeneity among the studies in participant characteristics, diseases studied, and methods used.

CONCLUSIONS

This analysis provides evidence that depression is associated with poor adherence to medication across a range of chronic diseases, and we find a new potential effect of adherence measurement type on this relationship. Although this study cannot assess causality, it supports the importance that must be placed on depression in studies that assess adherence and attempt to improve it.

Psychosocial Factors in Pediatric Asthma

This review discusses evidence-based perspectives on psychosocial factors in pediatric asthma. Future directions for inquiry and clinical management also are addressed.

Impact of socioeconomic status on the use of inhaled corticosteroids in young adult asthmatics

OBJECTIVE

The aim of this population-based longitudinal study was to examine the associations between socioeconomic status (SES) and anti-asthmatic treatment with inhaled corticosteroids (ICS) among young Danish adult asthmatics, and to investigate whether these associations were consistent over time.

METHODS

We extracted data on prescription drug use, education, and income in 97 665 users of anti-asthmatic drugs, aged 18-44 years, identified in Statistics Denmark during 1997-2005. Individual information on education and income was used as measures of SES. Education was categorised into basic school/high school, vocational training, and higher education, and income was categorised into low, middle, and high income. Associations between ICS use and SES were estimated by logistic regression models.

RESULTS

High levels of education and income were independently associated with ICS use, education demonstrating the strongest association. Using basic school/high school and low income as baselines, the adjusted odds ratios (ORs) of ICS use for higher education were 1.46 (95% CI 1.40-1.51) and 1.10 (95% CI 1.06-1.14) for high income. Higher education was a nearly constant factor associated with ICS use throughout the observation period, but high income did not demonstrate any association before 2001 with increasing ORs observed each year hereafter. All associations became more pronounced when restricting to 35-44 year-olds.

CONCLUSION

High levels of SES were positively associated with ICS use in young adult asthmatics. To encourage ICS use, special attention should be paid to asthmatics with low educational level and low income. Further studies are needed to elucidate underlying mechanisms for this socioeconomic inequality.

[Adult asthma exacerbations in questions]

In this article a French working party critically review the international literature to revise the definition, pathophysiology, treatment and cost of exacerbations of adult asthma. The various guidelines do not always provide a consistent definition of exacerbations of asthma. An exacerbation can be defined as deterioration of clinical and/or functional parameters lasting more than 24 hours, without return to baseline, requiring a change of treatment. No single clinical or functional criterion can be used as an early marker of an exacerbation. Innate and acquired immune mechanisms, modified by contact with infectious, irritant or allergenic agents, participate in the pathogenesis of exacerbations, which are accompanied by bronchial inflammation. In 2010, mortality is related to progression of exacerbations, often occurring before the patient seeks medical attention. The objective of treatment is to control asthma and prevent exacerbations. However, many factors can trigger exacerbations and often cannot be controlled. The efficacy of inhaled corticosteroids has been demonstrated on reduction of the number of exacerbations and the number of asthma-related deaths. This treatment is cost-effective, especially in terms of reduction of exacerbations.

Impact of an adherence intervention program on medication adherence barriers, asthma control, and productivity/daily activities in patients with asthma

OBJECTIVE

This study evaluated the impact of an asthma patient intervention program, with a focus on medication adherence on adherence barriers, asthma control, and productivity/daily activities.

METHODS

Patients ≥18 years old who were employed by a large Southeastern public school system, had ≥1 medical claim for asthma, and were taking ≥1 asthma medication were invited to participate in the study. The ASK-20, the Asthma Control Test (ACT), and a productivity questionnaire were administered before and after a 6-month period of intervention that involved the use of baseline ASK-20 results to create patient-specific reports on adherence barriers and talking points for care managers to use during the two outbound telephone calls addressing barriers identified. Patients also received three educational mailings. The ASK-20 is a brief, self-reported instrument developed to identify patient-specific barriers to medication adherence and to improve provider/patient communication about adherence.

RESULTS

Of 112 individuals who enrolled, 87 completed the program (77.7%). Participants' mean age was 48.2 years (SD = 10.5), and most were female (86.2%) and white (64.4%). The mean number of years with asthma was 17.5 (SD = 14.7); approximately one third (36.8%) of participants had had asthma for >20 years. The intervention was associated with a significant reduction in the number of adherence barriers (3.8 to 2.8; p = .0021) as well as improvement in asthma control as reflected in an increase in the percentage of participants with controlled asthma defined as having an ACT score > 19 (50.0% to 64.6%; p = .0285). Significant reductions in the mean number of days that housework or schoolwork was limited by asthma (p = .0059) and the mean number of days that family, social, or recreational activities were missed or limited because of asthma (p = .0185) were also observed. The majority of the participants (95%) rated the program as being good, very good, or excellent.

CONCLUSION

Programs incorporating a clinical assessment tool such as the ASK-20 for identifying a broad range of risk factors for nonadherence and for developing patient-specific intervention may reduce adherence barriers and improved disease control and ability to perform daily activities in patients with asthma.

Adherence to prophylactic asthma medication: habit strength and cognitions

OBJECTIVE

To explain adherence to prophylactic asthma medication (PAM, inhaled corticosteroids) by the attitude, social influence, and self-efficacy (ASE) model added with the concept of habit strength and to study whether habit moderates or mediates relationships between ASE factors and adherence.

METHODS

A mail-out survey was conducted among 139 asthmatic adults. Multiple regression analysis was conducted, with self-reported adherence as the outcome and ASE factors and habit as the independent variables. Simple slope analyses and bootstrapping mediation analyses were also conducted.

RESULTS

Having more severe asthma, taking PAM habitually, and perceiving few negative consequences of taking PAM were associated with better adherence. Self-efficacy influenced adherence indirectly through habit. The relationship between social norms and adherence was moderated by habit: In the case of weak habits, a supportive norm in a patient's environment toward taking PAM was positively related to PAM adherence; in the case of strong habits, a supportive norm led to less adherence.

CONCLUSION

Interventions to increase adherence should enhance the formation of habits by stimulating patients to perform the behavior frequently in similar situations by increasing self-efficacy and providing environmental cues, such as reminder devices and pill organizers. In addition, the disadvantages of PAM use should be negated.

Barriers to patient-clinician collaboration in asthma management: the patient experience

OBJECTIVE

To describe what adult patients with asthma report about their experiences with their own self-management behavior and working with their clinicians to control asthma.

METHODS

The study sample consisted of 104 patients with persistent asthma participating in a clinical trial on asthma monitoring. All subjects were seen by primary care clinicians of a large, academic medical center. This qualitative post hoc analysis examined the views of adults with asthma about their asthma-related health care. Patients attended monthly visits as part of their study participation, during which data were derived from semistructured interviews. All patients included in this analysis participated in the study for 1 year. At the end of study participation, patients were asked to complete an evaluation of their clinician's communication behavior. All study clinicians were also asked to complete a self-evaluation of their own communication behavior.

RESULTS

Five major themes of barriers to successful self-management were identified, including personal constraints, social constraints, communication failures, medication issues, and health care system barriers to collaboration with their clinicians. Patients most frequently reported lack of communication surrounding issues relating to day-to-day management of asthma (31%) and home management of asthma (24%). Clinicians generally rated themselves well for consistency in showing nonverbal attentiveness (89%) and maintaining interactive conversations (93%). However, only 30% of clinicians reported consistency in helping patients make decisions about asthma management and only 33% of clinicians reported consistency in tailoring medication schedules to the patient's routines.

CONCLUSION

These findings emphasize the difficulties of establishing and maintaining a therapeutic partnership between patients and clinicians. The results underscore the need for system-wide interventions that promote the success of a therapeutic patient-clinician relationship in order to achieve long-term success in chronic disease management.

Asthma in men and women: treatment adherence, anxiety, and quality of sleep

The aim of this study was to compare female and male asthmatics with special emphasis on reported adherence, anxiety, and quality of sleep. The study included 470 subjects with current asthma from the Nordic countries, who took part in the European Community Respiratory Health Survey (ECRHS) II. Subjects were investigated with a structured clinical interview, including questions on the presence of respiratory symptoms and therapy. They were also asked to fill in the self-reported Hospital Anxiety Depression scale and the Basic Nordic Sleep Questionnaire. Inhaled corticosteroids (OR=0.55) and a doctor's appointment in the last 12 months (OR=0.54) implied a significantly reduced risk for non-adherence in normal situations. At exacerbation in asthma, women had a significantly decreased risk for non-adherence (OR=0.46). Female gender and anxiety were independent risk factors for both insomnia (OR=3.67 and 2.53, respectively) and daytime sleepiness (OR=2.53 and 2.04, respectively). Women with asthma have a more positive attitude towards their medication, have a higher reported adherence, and use inhaled corticosteroids more often than men. At the same time women report more often anxiety and insomnia than men. Awareness of sex differences in the manifestations and attitudes towards treatment of asthma is important in order to improve asthma management.

Consistently very poorly controlled asthma, as defined by the impairment domain of the Expert Panel Report 3 guidelines, increases risk for future severe asthma exacerbations in The Epidemiology and Natural History of Asthma: Outcomes and Treatment Regimens (TENOR) study

BACKGROUND

Identification of patients at risk for asthma exacerbations can assist physicians in addressing disease management and improve asthma-related health outcomes.

OBJECTIVE

We sought to evaluate whether level of impairment, as defined by the 2007 asthma guidelines, predicts risk for future asthma exacerbations.

METHODS

The study included children aged 6 to 11 years (n = 82) and adolescent/adult patients aged 12 years and older (n = 725) from The Epidemiology and Natural History of Asthma: Outcomes and Treatment Regimens study with data representing all components of the impairment domain of the asthma guidelines at baseline, month 12, and month 24. Patients were categorized into 2 cohorts: (1) consistently very poorly controlled (VPC) asthma from baseline through 2 years of follow-up and (2) improved from VPC asthma at baseline (including patients who improved to not well-controlled or well-controlled asthma), with improvement maintained through 2 years of follow-up. Odds ratios (ORs) and 95% CIs for risk of asthma exacerbations at month 30 were generated by using multivariable logistic regression by age group.

RESULTS

After adjustment, children with consistently VPC asthma over the 2-year period demonstrated a 6-fold increased risk of hospitalization, emergency department visit, or corticosteroid burst (OR, 6.4; 95% CI, 1.2-34.5) compared with the improved group. Adolescent/adult patients with consistently VPC asthma were more likely to have a corticosteroid burst (OR, 2.8; 95% CI, 1.7-4.8) or have a hospitalization, emergency department visit, or corticosteroid burst (OR, 3.2; 95% CI, 1.9-5.3).

CONCLUSIONS

Consistently VPC asthma, as defined by the impairment domain of the 2007 asthma guidelines, is strongly predictive of future asthma exacerbations.

Socioeconomic deprivation does not influence the severity of Crohn's disease: Results of a prospective multicenter study

BACKGROUND

Socioeconomic deprivation is associated with poor health. The aims of this study were to evaluate the influence of deprivation in the characteristics and comparisons of deprived and nondeprived Crohn's disease (CD) patients.

METHODS

CD patients were prospectively recruited from September 2006 to June 2007 in 6 hospitals in the Paris area. To assess the level of deprivation we used the EPICES score (Evaluation of Precarity and Inequalities in Health Examination Centers; http://www.cetaf.asso.fr), a validated individual index of deprivation developed in France, a score >30 defining deprivation. We defined CD as severe when at least 1 of the conventionally predefined criteria of clinical severity was present.

RESULTS

In all, 207 patients (128 women and 79 men, mean age 40 years) were included and had a median score of deprivation of 20.7 (0-100). Seventy-three (35%) were deprived. There were no statistical differences between deprived and nondeprived patients for the following parameters: 1) mean age: 39 +/- 14.6 versus 40.6 +/- 13.5, P = 0.4; 2) sex ratio (female/male): 87/47 (65%) versus 41/32 (56%), P = 0.2; 3) duration of disease (years) 9 +/- 8.8 versus 8.5 +/- 7.2, P = 0.7; 4) delay from onset of symptoms to diagnosis >1 year: 22/115 (19%) versus 13/63 (21%), P = 0.8; and 5) severity of disease 71% versus 70% (P = 0.9). Nondeprived patients had a lower rate of hospitalization (40 versus 56%, P = 0,04) and a higher rate of surgery (44 versus 22%, P = 0,004); the rate of surgery was only identified by logistic regression.

CONCLUSIONS

In this study deprivation does not seem to influence the severity of CD. This can be explained by easy access to healthcare in France.