Overcoming gaps in the management of asthma in older patients: new insights

Short palate, lung, and nasal epithelial clone 1 (SPLUNC1) level determines steroid-resistant airway inflammation in aging

Asthma and its heterogeneity change with age. Increased airspace neutrophil numbers contribute to severe steroid-resistant asthma exacerbation in the elderly, which correlates with the changes seen in adults with asthma. However, whether that resembles the same disease mechanism and pathophysiology in aged and adults is poorly understood. Here, we sought to address the underlying molecular mechanism of steroid-resistant airway inflammation development and response to corticosteroid (Dex) therapy in aged mice. To study the changes in inflammatory mechanism, we used a clinically relevant treatment model of house-dust mite (HDM)-induced allergic asthma and investigated lung adaptive immune response in adult (20-22 wk old) and aged (80-82 wk old) mice. Our result indicates an age-dependent increase in airway hyperresponsiveness (AHR), mixed granulomatous airway inflammation comprising eosinophils and neutrophils, and Th1/Th17 immune response with progressive decrease in frequencies and numbers of HDM-bearing dendritic cells (DC) accumulation in the draining lymph node (DLn) of aged mice as compared with adult mice. RNA-Seq experiments of the aged lung revealed short palate, lung, and nasal epithelial clone 1 (SPLUNC1) as one of the steroid-responsive genes, which progressively declined with age and further by HDM-induced inflammation. Moreover, we found increased glycolytic reprogramming, maturation/activation of DCs, the proliferation of OT-II cells, and Th2 cytokine secretion with recombinant SPLUNC1 (rSPLUNC1) treatment. Our results indicate a novel immunomodulatory role of SPLUNC1 regulating metabolic adaptation/maturation of DC. An age-dependent decline in the SPLUNC1 level may be involved in developing steroid-resistant airway inflammation and asthma heterogeneity.

Risk Factors for Acute Exacerbations in Elderly Asthma: What Makes Asthma in Older Adults Distinctive?

Purpose

Asthma in the elderly (EA; ≥ 65 years of age) is increasing, adding a heavy socioeconomic burden to the healthcare system. However, little is known about risk factors associated with acute exacerbations in EA patients. The objective of this study was to investigate risk factors for acute exacerbation in EA compared to non-elderly asthma (NEA).

Methods

We combined data from 3 adult asthma cohorts under a unified protocol and database. Asthmatic patients with regular follow-up during a 1-year period were selected from the cohorts to identify the risk factors predicting acute exacerbations in EA compared to NEA.

Results

We selected a total of 1,086 patients from the merged cohort. During the observation period, 503 and 583 patients were assigned to the EA and NEA groups, respectively. The exacerbation rate was 31.0% in the EA and 33.2% in the NEA group. Multivariate logistic regression analysis revealed fixed airway obstruction, chronic rhinosinusitis (CRS), and male sex as independent risk factors for exacerbation in the EA group. In the NEA group, exacerbation increased along with an increase in eosinophil count. Bayesian analysis of the interactions among clinical factors revealed that forced expiratory volume in 1 second/forced vital capacity was directly related to exacerbation in the EA group, and eosinophil count was related to exacerbation in the NEA group.

Conclusions

We suggest that fixed airway obstruction and CRS as the important clinical factors predicting acute exacerbations in EA, whereas in NEA, eosinophil count was the strong predictor of exacerbation.

Association Between Epithelial Cytokines and Clinical Phenotypes of Elderly Asthma

Purpose

Asthma in the elderly has different clinical features including more severe phenotypes with higher comorbidities. Epithelial cells are known to initiate innate/adaptive immune responses in asthmatic airways. We investigated clinical features and epithelial derived cytokine levels in elderly asthmatics compared to non-elderly asthmatics in a cross-sectional cohort of adult asthmatics in order to further understand its pathogenic mechanisms.

Methods

A total of 1,452 adult asthmatics were enrolled from a single tertiary hospital and were classified into 2 groups: 234 elderly (≥ 60 years at initial diagnosis) and 1,218 non-elderly (< 60 years at initial diagnosis) asthmatics. Asthma-related clinical parameters were compared between the 2 groups. Serum levels of epithelial cell-derived cytokines including interleukin (IL)-31, IL-33, IL-8, eotaxin-2, transforming growth factor beta 1 (TGF-β1) and periostin were measured by enzyme-linked immunosorbent assay.

Results

Significantly higher prevalence rates of late-onset asthma (onset age ≥ 40 years) and severe asthma, as well as the lower rate of atopy, blood/sputum eosinophil counts, total immunoglobulin E and eosinophil cationic protein levels were noted in elderly asthmatics compared to non-elderly asthmatics (P < 0.05, respectively). The forced expiratory volume in 1 second (FEV1, % predicted) level tended to be lower in elderly asthmatics (P = 0.07). In addition, serum IL-33 and IL-31 levels were significantly lower in elderly asthmatics, while no differences were found in the serum level of IL-8, eotaxin-2, TGF-β1 or periostin. Among elderly asthmatics, subjects with severe asthma had lower FEV1 (% predicted) value, but showed significantly higher serum levels of eotaxin-2 and TGF-β1, than those with non-severe asthma (P < 0.05 for each).

Conclusions

These findings suggest that age-related changes of epithelial cell-derived cytokines may affect clinical phenotypes and severity of elderly asthma: decreased levels of IL-33 and IL-31 may contribute to less Th2 phenotype, while increased levels of eotaxin-2 and TGF-β1 may contribute to severity.

Comparative Clinical, Physiological, and Inflammatory Characteristics of Elderly Subjects With or Without Asthma and Young Subjects With Asthma

BACKGROUND

Asthma seems to present in the elderly as a specific phenotype that remains to be further described. In this prospective observational study, we aimed to assess the multidimensional aspects of asthma in the elderly.

METHODS

In young (18 to 35 years old) subjects with mild to moderate asthma and elderly subjects (aged ≥60 years) either with or without mild to moderate asthma, we compared asthma control, health care and medication use, lung function, markers of airway and systemic inflammation, and adherence to therapy.

RESULTS

Fifty subjects were recruited in each group. Elderly people with asthma showed more marked airway obstruction compared with young people with asthma and elderly people without asthma. They also had poorer asthma control, mainly associated with a lower FEV₁, compared with young people with asthma, although airway responsiveness, health care use, prescribed doses of inhaled corticosteroids, and adherence to treatment were similar in both groups. Elderly subjects had an increase in some markers of systemic inflammation and bronchial epithelial dysfunction compared with young people with asthma. Blood eosinophils were higher in both asthma groups, particularly in elderly people with asthma. Sputum neutrophils were increased in both groups of elderly subjects and sputum eosinophils were increased in elderly people with asthma compared with the other two groups.

CONCLUSIONS

Asthma in the elderly presents as a specific phenotype associated with increased airway obstruction and mixed airway inflammation in addition to signs of systemic inflammation.

The current state and provisions for elderly patients with asthma

Demographic statistics of Japan indicate that it is moving toward a super‐aging society and, accordingly, the ratio of elderly patients with asthma is also increasing. An important point in diagnosing elderly patients with asthma is that the onset of asthma in old age, along with a history of smoking, differentiation, and complications of chronic obstructive pulmonary disease must be considered. Primary care physicians must understand the characteristics of elderly patients when treating them. When conducting inhalation therapy in any asthmatic patient, especially elderly asthmatic patients, it is important to teach the patients proper technique and sustain medication adherence. We believe this effort will lead to an improvement in controlling asthma as well as a decrease in the number of asthma deaths.

Antileukotriene Agents Versus Long-Acting Beta-Agonists in Older Adults with Persistent Asthma: A Comparison of Add-On Therapies

OBJECTIVES

To compare the effectiveness and cardiovascular safety of long-acting beta-agonists (LABAs) with those of leukotriene receptor antagonists (LTRAs) as add-on treatments in older adults with asthma already taking inhaled corticosteroids (ICSs).

DESIGN

Retrospective cohort study.

SETTING

Medicare fee-for-service (FFS) claims (2009-10) for a 10% random sample of beneficiaries continuously enrolled in Parts A, B, and D in 2009.

PARTICIPANTS

Medicare beneficiaries aged 66 and older continuously enrolled in FFS Medicare with Part D coverage with a diagnosis of asthma before 2009 treated exclusively with ICSs plus LABAs or ICSs plus LTRAs (N = 14,702).

MEASUREMENTS

The augmented inverse propensity-weighted estimator was used to compare the effect of LABA add-on therapy with that of LTRA add-on therapy on asthma exacerbations requiring inpatient, emergency, or outpatient care and on cardiovascular (CV) events, adjusting for demographic characteristics, comorbidities, and county-level healthcare-access variables.

RESULTS

The primary analysis showed that LTRA add-on treatment was associated with greater odds of asthma-related hospitalizations or emergency department visits (odds ratio (OR) = 1.4, P < .001), as well as outpatient exacerbations requiring oral corticosteroids or antibiotics (OR = 1.41, P < .001) than LABA treatment. LTRA add-on therapy was also less effective in controlling acute symptoms, as indicated by greater use of short-acting beta agonists (rate ratio = 1.58, P < .001). LTRA add-on treatment was associated with lower odds of experiencing a CV event than LABA treatment (OR = 0.86, P = .006).

CONCLUSION

This study provides new evidence specific to older adults to help healthcare providers weigh the risks and benefits of these add-on treatments. Further subgroup analysis is needed to personalize asthma treatments in this high-risk population.

Cost-Utility Analysis of Long-Acting Beta Agonists versus Leukotriene Receptor Antagonists in Older Adults with Persistent Asthma Receiving Concomitant Inhaled Corticosteroid Therapy

BACKGROUND

Long-acting beta agonists (LABA) and leukotriene receptor antagonists (LTRA) are the major add-on treatments in older adults with persistent asthma when inhaled corticosteroids (ICS) fail to achieve adequate asthma control.

OBJECTIVES

To evaluate the cost-utility of ICS + LABA treatment compared with ICS + LTRA treatment in older adults with asthma.

METHODS

A Markov model was used to estimate the incremental costs and quality-adjusted life expectancy associated with ICS + LABA treatment versus ICS + LTRA treatment in older adults with asthma in the United States from the health system perspective. The HCUPnet 2010 national statistics were used to extract the costs associated with asthma and cardiovascular hospitalizations, and inpatient mortality associated with these events. Event probabilities were predicted using Medicare 2009-2010 claims for older adults with asthma. Treatment costs were estimated on the basis of average wholesale drug price listings, and utility estimates were extracted from the literature. To account for uncertainty, one-way sensitivity analysis and probabilistic sensitivity analysis were performed.

RESULTS

The model predicted that, compared with ICS + LTRA treatment, ICS + LABA treatment costs $5,823 more while gaining 0.03 quality-adjusted life-years (QALYs), resulting in an incremental cost-effectiveness ratio of $209,090 per QALY. Hospitalization probabilities and posthospitalization utilities were the most influential parameters in the one-way sensitivity analysis. Probabilistic uncertainty analysis using Monte-Carlo simulations showed that the probabilities that ICS + LTRA treatment is cost-effective compared with ICS + LABA treatment are 77% and 62% at $50,000 and $100,000 per QALY gained willingness-to-pay thresholds, respectively.

CONCLUSIONS

The cost-effectiveness of ICS + LABA treatment is economically unfavorable in older adults when compared with LTRA as add-on treatment.

Anticholinergics/antimuscarinic drugs in asthma

Anticholinergic alkaloids have been used for thousands of years for the relief of bronchoconstriction and other respiratory symptoms, and their use in the treatment of chronic obstructive pulmonary disease is well established. Acetylcholine, acting through muscarinic receptor (M) receptor, modulates multiple physiologic functions pertinent to asthma including airway muscle tone, mucus gland secretion, and various parameters of inflammation and remodeling. In addition, activation of M receptors may inhibit beta2 adrenoreceptor. These observations offer the rationale for the use of M receptors antagonists in the treatment of asthma. Short-acting antimuscarinic agents may be effective alone or in combination with short-acting beta agonists for the relief of acute symptoms. Long-acting antimuscarinic agents have emerged as potentially useful in the long-term treatment of difficult-to-control asthma. This review will analyze the mechanisms of action and therapeutic role of antimuscarinic agents on asthma including current guidelines regarding antimuscarinic drugs, recent studies in asthma, special populations to consider, and possible predictors of response.

Inhaler device technique can be improved in older adults through tailored education: findings from a randomised controlled trial

Aim:

To investigate the effects of inhaler device technique education on improving inhaler technique in older people with asthma.

Methods:

In a randomised controlled trial, device technique education was provided to a sample of 123 adults aged >55 years who had a doctor diagnosis of asthma. The active education group received one-on-one technique coaching, including observation, verbal instruction and physical demonstration at baseline. The passive group received a device-specific instruction pamphlet only. Inhaler technique, including the critical steps for each device type, was assessed and scored according to Australian National Asthma Council (NAC) guidelines. Device technique was scored objectively at baseline and again at 3 and 12 months post education.

Results:

The majority of participants demonstrated poor technique at baseline. Only 11 (21%) of the active intervention group and 7 (16%) of the passive group demonstrated 100% correct technique. By 3 months 26 (48%) of the active group achieved adequate technique. Improvement in technique was observed in the active group at 3 months (P<0.001) and remained significant at 12 months (P<0.001). No statistically significant improvement was observed in the passive group.

Conclusion:

The provision of active device technique education improves device technique in older adults. Passive education alone fails to achieve any improvement in device technique.

Asthma in the elderly: what we know and what we have yet to know

In the past, asthma was considered mainly as a childhood disease. However, asthma is an important cause of morbidity and mortality in the elderly nowadays. In addition, the burden of asthma is more significant in the elderly than in their younger counterparts, particularly with regard to mortality, hospitalization, medical costs or health-related quality of life. Nevertheless, asthma in the elderly is still been underdiagnosed and undertreated. Therefore, it is an imperative task to recognize our current challenges and to set future directions. This project aims to review the current literature and identify unmet needs in the fields of research and practice for asthma in the elderly. This will enable us to find new research directions, propose new therapeutic strategies, and ultimately improve outcomes for elderly people with asthma. There are data to suggest that asthma in older adults is phenotypically different from young patients, with potential impact on the diagnosis, assessment and management in this population. The diagnosis of AIE in older populations relies on the same clinical findings and diagnostic tests used in younger populations, but the interpretation of the clinical data is more difficult. The challenge today is to encourage new research in AIE but to use the existing knowledge we have to make the diagnosis of AIE, educate the patient, develop a therapeutic approach to control the disease, and ultimately provide a better quality of life to our elderly patients.

Asthma Control and Its Relationship with Obstructive Sleep Apnea (OSA) in Older Adults

Background/Objectives. Asthma in older individuals is poorly understood. We aimed to characterize the older asthma phenotype and test its association with obstructive sleep apnea (OSA). Design. Cross-sectional. Setting. Pulmonary and Asthma/Allergy clinics. Participants. 659 asthma subjects aged 18–59 years (younger) and 154 aged 60–75 (older). Measurements. Sleep Apnea scale of Sleep Disorders Questionnaire (SA-SDQ), asthma severity step (1–4, severe if step 3 or 4), established OSA diagnosis, continuous positive airway pressure (CPAP) use, and comorbidities. Results. Older versus younger had worse control, as assessed by asthma step, lung function, and inhaled corticosteroid use. Among older subjects, after controlling for known asthma aggravators, OSA diagnosis was the only factor robustly associated with severe asthma: on average, OSA was associated with nearly 7 times greater likelihood of severe asthma in an older individual (OR = 6.67). This relationship was of greater magnitude than in younger subjects (OR = 2.16). CPAP use attenuated the likelihood of severe asthma in older subjects by 91% (P = 0.005), much more than in the younger asthmatics. Conclusion. Diagnosed OSA increases the risk for worse asthma control in older patients, while CPAP therapy may have greater impact on asthma outcomes. Unrecognized OSA may be a reason for poor asthma control, particularly among older patients.

Analysis of the impact of selected socio-demographic factors on quality of life of asthma patients

Aim

To evaluate the influence of selected socio-demographic factors on quality of life of patients with different degrees of asthma severity.

Material and methods

The study was conducted in 2009–2010 in the Clinic of Allergology, Clinical Immunology and Internal Diseases in Dr J. Biziel University Hospital No. 2 in Bydgoszcz. Patients were divided into a tested group (126) and a control group (86). The criterion for the division was the degree of asthma control according to GINA 2006. The following tools were used: the author's questionnaire containing questions about socio-demographic and clinical data, and the WHOQOL-100.

Results

In the tested group, a statistically significant correlation was observed between quality of life and age (p < 0.002 for the entire population), education (p < 0.05 in the group with controlled asthma, p = 0.0005 for the entire population), professional activity (p < 0.003 in the group with partially controlled asthma, p < 0.05 with uncontrolled asthma and p < 0.0001 in the entire population), marital status (p = 0.025 for the entire population) and financial situation (p < 0.0001; p < 0.0002; p < 0.009 in all groups; p < 0.0001 in the entire population). There was no significant difference between quality of life, and sex and the place of residence of the respondents.

Conclusions

Age, education, professional activity, marital status and financial situation affect the assessment of quality of life in patients with asthma. Socio-demographic factors such as sex and the place of residence do not influence the assessment of quality of life in patients with asthma.

'Get Your Life Back': process and impact evaluation of an asthma social marketing campaign targeting older adults

Background

Asthma in older adults is underdiagnosed and poorly self-managed. This population has little knowledge about the key symptoms, the prevalence among older adults, and the serious consequences of untreated asthma. The purpose of this study was to undertake a multifaceted evaluation of a social marketing campaign to increase asthma awareness among older adults in a regional Australian community.

Methods

A cohort of older adults in an intervention region (n = 316) and a control region (n = 394) were surveyed immediately prior to and following the social marketing campaign. Campaign awareness, message recall, materials recognition, and actions taken as a result of the campaign were assessed in both regions. Asthma knowledge and perceptions, experience of asthma symptoms, and general health were also assessed in both regions at baseline and follow-up. Analyses were conducted to explore the effects of the campaign in the intervention region, and to examine outcomes among different audience segments.

Results

The survey data showed that those in the target segments (Wheezers and Strugglers) had better message recall, and were more likely to report having taken action to control their respiratory symptoms. The campaign significantly increased the number of calls to an asthma information line from the target audience in the intervention community.

Conclusions

A theory-based social marketing campaign conducted over 3-months increased the asthma information seeking behaviours of older adults in the intervention community compared to the control community. Recommendations are outlined for future community health promotion campaigns targeting older adults.

Differences between asthma in young and elderly: results from the COREA study

BACKGROUND

There has been no large-scale and comprehensive study of the differences between asthma in elderly asthmatics (EA) and non-elderly (i.e. young) asthmatics (NEA).

METHODS

We performed principal component analysis (PCA) using 2067 asthmatics (434 EA and 1633 NEA) from the Korean Cohort for Reality and Evolution of adult Asthma (COREA). EA was defined as asthmatics with the chronological age of 65 or more and eleven clinical variables measured at enrollment were used for PCA; symptom score, symptom duration, number of exacerbation during previous one year, smoking pack year, number of controller medications, body mass index, predicted % of FEV1, predicted % FVC, post-bronchodilator FEV1/FVC ratio, atopy index and number of eosinophils in peripheral blood.

RESULTS

PCA of all asthmatics showed that EA and NEA were distinctly separated by the first and second principal component on the plot of individual asthmatics according to their scores. For further analysis, we divided all asthmatics into the EA and the NEA group and performed PCA again in each group. The first four principal components with eigenvalues ≥ 1.0 were identified in both groups and they explained 55.5% of the variance in the EA group and 52.4% in the NEA group respectively. Clinical variables showed distinctly different patterns of loading on the first four principal components between the EA and the NEA group.

CONCLUSION

EA and NEA have different compositional patterns underlying their clinical variables. These observations helped in understanding the differences between EA and NEA from the integrated view covering various clinical aspects.

Insight into older peoples' healthcare experiences with managing COPD, asthma, and asthma-COPD overlap

OBJECTIVE

The aim of this study was to explore older peoples' experiences of asthma or COPD with reference to their journey in the healthcare system.

METHODS

We recruited older patients with a confirmed diagnosis of asthma or COPD and invited them to participate in a qualitative interview. Interviews were conducted with 21 participants. A line-by-line analysis of the interviews was performed and they were coded for common themes.

RESULTS

From the data, six main themes emerged, these were; "limits to being", "being with or without a diagnosis", "not being heard or recognized", "expectation, fears, and hopes", "to medicate or not: the underuse, abuse, and misuse", and "needing to understand more". The findings of these interviews provide an important understanding of the behaviors and healthcare needs of older people with asthma and COPD. Older patients' adherence patterns, desire for person-centeredness, and involvement in shared decisions as well as desire for increased objective assessment are described.

CONCLUSIONS

These findings provide an important understanding of the behaviors and healthcare needs of older people with asthma and COPD, an area that has not been well defined. The knowledge gained about older patients' desire for person--centeredness and involvement in shared decisions, as well as desire for increased objective assessment is essential in improving care.

Differentiating the treatment of asthma and chronic obstructive pulmonary disease in the elderly patient

The focus of this case is a 70-year-old female who was admitted to an assisted living community following a hospitalization for a severe asthma exacerbation. The diagnosis of asthma in the geriatric patient is often under-recognized, misdiagnosed, and improperly managed. Several factors may explain the misclassification and the undertreatment of asthma in the older patient. This case discusses the pharmacotherapeutic management of asthma in the geriatric patient and differentiates the clinical features of asthma from that of chronic obstructive lung disease. The comprehensive management of asthma should include an interprofessional approach because the consultant pharmacist is an essential member of the health care team.

Effect of combination fluticasone propionate and salmeterol or inhaled corticosteroids on asthma-related outcomes in a Medicare-eligible population

BACKGROUND

National asthma treatment guidelines recommend either the use of inhaled corticosteroids (ICS) or ICS in combination with a long-acting bronchodilator for the treatment of moderate to severe asthma. Even though asthma is common among older adults, few studies have assessed the differences in effectiveness between these two recommended therapies in patients over 65 years of age.

OBJECTIVE

The aim of this study was to assess the association of the fluticasone-salmeterol combination (FSC) or ICS initiation on asthma-related events in Medicare-eligible asthma patients.

METHODS

This was a retrospective observational study using a large health claims database (July 1, 2001 to June 30, 2008). Subjects 65 to 79 years of age with 12-month preindex and 3- to 12-month postindex eligibility, an asthma diagnosis (ICD-493.xx), and with 1 or more FSC or ICS claims at index were included. Subjects with an FSC or ICS claim in the preindex and any claim for chronic obstructive pulmonary disease were excluded. Subjects were observed until they had an event (emergency department [ED] inpatient hospitalization [IP], combined IP/ED or oral corticosteroid [OCS] use) or were no longer eligible in the database, whichever came first. Cox proportional hazards regression was used to assess risk of an asthma-related event (IP, ED, or IP/ED). Baseline characteristics (age, sex, region, index season, comorbidities, preindex use of short-acting β-agonists, OCS, other asthma controllers, and asthma-related ED/IP visits) were independent covariates in the model.

RESULTS

A total of 10,837 met the criteria (4843 ICS and 5994 FSC). Age (70.4 and 70.5 years, respectively) and the percentage of female subjects (65.5% and 64.8%, respectively) were similar. Asthma-related events were also similar at baseline. Postindex unadjusted rates occurring after >30 days were ED (1.8% vs 1.5%, P = 0.18), IP (2.7% vs 1.7%, P < 0.001), and ED/IP (4.1% vs 2.8%, P < 0.001) for ICS and FSC, respectively. Subjects who received FSC were associated with a 32% (adjusted HR = 0.68; 95% CI, 0.51-0.91) lower risk of experiencing an IP visit and a 22% (HR = 0.78; 95% CI, 0.62-0.98) lower risk of experiencing an ED/IP visit. No differences were observed for ED visits (HR = 0.94; 95% CI, 0.68-1.29).

CONCLUSIONS

In Medicare-eligible asthma patients, FSC use was associated with lower rates of asthma-related serious exacerbations compared with ICS.

Asthma in the elderly: Current understanding and future research needs--a report of a National Institute on Aging (NIA) workshop

Asthma in the elderly is underdiagnosed and undertreated, and there is a paucity of knowledge on the subject. The National Institute on Aging convened this workshop to identify what is known and what gaps in knowledge remain and suggest research directions needed to improve the understanding and care of asthma in the elderly. Asthma presenting at an advanced age often has similar clinical and physiologic consequences as seen with younger patients, but comorbid illnesses and the psychosocial effects of aging might affect the diagnosis, clinical presentation, and care of asthma in this population. At least 2 phenotypes exist among elderly patients with asthma; those with longstanding asthma have more severe airflow limitation and less complete reversibility than those with late-onset asthma. Many challenges exist in the recognition and treatment of asthma in the elderly. Furthermore, the pathophysiologic mechanisms of asthma in the elderly are likely to be different from those seen in young asthmatic patients, and these differences might influence the clinical course and outcomes of asthma in this population.

Allergic diseases in the elderly

Demographic distribution of the population is progressively changing with the proportion of elderly persons increasing in most societies. This entails that there is a need to evaluate the impact of common diseases, such as asthma and other allergic conditions, in this age segment. Frailty, comorbidities and polymedication are some of the factors that condition management in geriatric patients. The objective of this review is to highlight the characteristics of allergic diseases in older age groups, from the influence of immunosenescence, to particular clinical implications and management issues, such as drug interactions or age-related side effects.

Asthma in the Elderly: Can We Distinguish It from COPD?

Asthma in older adults affects quality of life and results in a higher hospitalization rate and mortality. In common clinical practice, asthma in the elderly is underdiagnosed and undertreated or overdiagnosed and mistreated. The age-related reduction in perception of shortness of breath and the high incidence of comorbidities make the diagnosis and management more difficult and challenging for the physicians. Chronic obstructive pulmonary disease (COPD) is usually easy to distinguish from asthma, but sometimes the distinction from late-onset asthma in older patients, particularly in cigarette smokers, is difficult and may be impossible. Both diseases are characterized by the presence of airflow obstruction but have distinct pathogenesis, inflammatory pattern, and prognosis. The distinction between Asthma and COPD based simply on spirometric parameters is difficult especially in the elderly asthmatics. The combination of lung function testing, bronchial hyperresponsiveness (BHR) and atopy status, HRCT scans, and the newly developed biological techniques, allowing the assessment of biomarker profiles, could facilitate the distinction between these diseases.

Asthma mortality in Puerto Rico: 1980-2007

BACKGROUND

Asthma is a highly prevalent chronic disease. Prevalence and mortality are particularly high in Puerto Ricans living in the United States as compared with other populations.

OBJECTIVE

To determine asthma mortality rates in Puerto Rico (1980-2007) and to assess the sociodemographic variables that may be associated with these rates.

METHODS

Data were obtained from the Vital Statistics Office at the Puerto Rico Department of Health. Crude mortality rates (CMRs) and their 95% confidence intervals (95% CIs) were used to evaluate differences between age groups and across years. Mortality risk ratios (RRs) by sociodemographic variables were estimated using generalized lineal models with a Poisson link function to identify at-risk groups.

RESULTS

During the study period, there were 4232 deaths recorded with asthma as the cause of death. From 1980 to 1998, annual asthma mortality rates fluctuated between 3.32 and 6.56 deaths per 100,000 (mean 4.77), followed by a decline after implementation of the ICD-10 for reporting cause of death in 1999. Between 1999 and 2007, the mean asthma death rate declined to 3.01 (4.89 in 1999 to 2.02 in 2007). Overall, asthma mortality rates were between 1.77 and 4.0 times higher in Puerto Rico than in the United States. Throughout the whole study period, mortality rates were higher in older age groups. In addition, the adjusted regression model for asthma deaths showed that persons divorced or widowed, and persons with only elementary education had significantly higher risk of asthma mortality than their counterparts.

CONCLUSION

Asthma death rates were higher in Puerto Rico than in the United States general population. Although asthma mortality in Puerto Rico declined, rates continued to be significantly higher than those recorded in the United States. There was a progressive decline in asthma mortality rates after 1999 that may be explained by changes in reporting classification, increased use of corticosteroids, and improved asthma awareness. After controlling for possible confounding variables, age and elementary education were found to increase the risk of mortality due to asthma among Puerto Ricans.

Effect of age on asthma control: results from the National Asthma Survey

BACKGROUND

two million US citizens older than 65 years have asthma, but little is known about asthma control in this population.

OBJECTIVE

to compared short- and long-term asthma control in elderly (≥ 65 years old) and young adult (18-64 years old) populations from the National Asthma Survey.

METHODS

data from the National Asthma Survey (sponsored by the Centers for Disease Control and Prevention) were analyzed. Demographic variables, health insurance status, smoking status, indoor allergen exposure, and asthma education were compared between the young adult and elderly populations. Asthma control was examined based on short-term measures (recent oral corticosteroid bursts or symptoms) and long-term measures (asthma attacks, urgent care visits, hospitalizations, and activity limitation in the previous year).

RESULTS

a total of 2,557 young and 398 elderly asthmatic patients were included. Elderly patients had a lower income, were less educated, were more obese, were more insured, had less indoor exposure, and were more likely to be former smokers. They were less educated about asthma attack interventions and asthma action plans (P < .05 for both). On multivariate analysis, elderly patients had worse control of asthma based on short-term measures (daytime symptoms in the previous month [odds ratio (OR), 1.73; 95% confidence interval (CI), 1.25-2.35] and any short-term measure [OR, 1.48; 95% CI, 1.11-1.97]) and long-term measures (activity limitation in the previous year [OR, 1.50; 95% CI, 1.12-2.01]).

CONCLUSIONS

elderly asthmatic patients have worse short- and long-term asthma control compared with the young adult population. Further studies are needed to elucidate whether these findings are due to pathophysiologic differences and whether tailored education or other novel strategies can provide better asthma control.

Asthma education for older adults: results from the National Asthma Survey

RATIONALE

Although asthma education is effective in younger population, it is unknown whether it is effective in older adults.

METHODS

Using the Four-State National Asthma Survey (NAS) data, asthma control was compared between older adults (≥65 years) who had been taught to use a peak flow meter (PFM) and asthma action plan (AAP) with those who had not. We also compared older adults who had taken an asthma course with those who had not. Both short-term (symptoms within last 1 week, day and night symptoms in last 30 days, and the use of steroid in last 3 months) and long-term (asthma attack, emergency department visit, hospitalizations, and activity limitations in the prior year) outcomes were compared.

RESULTS

Three hundred and ninety-eight older adults with asthma were identified. There were no differences in the short- and long-term asthma outcomes between the older adults who had or had not received instruction on PFM or AAP use. In preliminary analysis, those who took AC were more likely to have at least one poorly controlled long-term outcome measure (81 vs. 65%, p = 0.034). However, this difference did not remain significant in a logistic regression analysis.

CONCLUSIONS

Engagement in asthma education course, instruction on action plans, and instruction on PFM use does not appear to affect asthma outcomes in older adults. Education specifically tailored toward older adults is required for better asthma control.

Asthma in older adults

Asthma in older people is common and is characterised by underdiagnosis and undertreatment. Ageing is associated with unique issues that modify expression, recognition, and treatment of the disease. In particular, asthma and chronic obstructive pulmonary disease (COPD) both overlap and converge in older people. This concurrence, together with absence of precise diagnostic methods, makes diagnosis complex. A multidimensional assessment that addresses airway problems, comorbidities, risk factors, and management skills will draw attention to key needs for intervention. Increased attention to the complications of asthma and obstructive airway disease in older people is needed, specifically to develop effective systems of care, appropriate clinical practice guidelines, and a research agenda that delivers improved health outcomes.

'You have to learn to live with it': a qualitative and quantitative study of older people with asthma

INTRODUCTION

Asthma mortality has declined overall because of a range of public health initiatives. In western countries, the majority of asthma deaths now occur in people over the age of 50. The reasons for the poorer response of older age groups to public health asthma initiatives are not known.

OBJECTIVES

We undertook a study to investigate the disease perspectives of older people with asthma and barriers which may exist and prevent optimal asthma care.

METHODS

Fifty-five participants (16 male and 39 female) aged over 50 from an inner city, suburban area and a rural region were recruited. Lung function was measured, and questionnaire data on asthma symptoms, knowledge and control, medication use and respiratory health were collected. Participants were also interviewed in-depth, and the quantitative and qualitative data were triangulated.

RESULTS

Participants with a duration of asthma for >30 years reported significantly fewer symptoms and better quality of life irrespective of asthma severity, indicating less appreciation of symptoms in those with a long asthma duration. Interviews revealed this was related to previous asthma management strategies when treatment options were limited. Participants with a recent diagnosis sought understanding of asthma and the reason for their illness. Initiatives to improve asthma care in older people need to reflect these findings.

CONCLUSIONS

Self-management strategies for older people need to be tailored according to the time of disease onset and the duration of disease.

Asthma in the elderly: current knowledge and future directions

PURPOSE OF REVIEW

Asthma is a common disease in the older population that is frequently undiagnosed and undertreated. We will review the current knowledge of asthma in the elderly (AIE) and shed light on the diagnostic and management challenges outlining needs for future research.

RECENT FINDINGS

There has been very little original research in the field of AIE published in the last few years, and current literature focuses primarily on a series of review articles. AIE often presents with multiple comorbidities, which complicates its course and management. There is renewed interest in nonallergic (intrinsic) asthma. T helper cell 1 inflammation triggered by respiratory infection, superantigens, proteases and interleukin 17 are possible mechanisms. An association between systemic inflammation in frailty and asthma may also be important.

SUMMARY

The diagnosis and treatment of AIE requires that the individual patient and his or her specific triggers and the likely pathophysiology be understood. Understanding the mechanisms of inflammation in this population is key to improved therapeutic interventions.

Individualized programme to promote self-care among older adults with asthma: randomized controlled trial

AIM

This paper is a report of a trial to examine the effectiveness of individualized self-care education programmes in older adults with moderate-to-severe asthma.

BACKGROUND

Asthma is a common chronic disease in adults and a major cause of frequent work absences, emergency room visits, and hospitalization. The results of studies of self-care education programmes have been largely supportive and suggest that they have positive outcomes for people with asthma. However, for older people with asthma, the effectiveness of computer-aided, self-learning video programmes has been controversial.

METHODS

Older adult patients with asthma (N = 148) were randomly assigned to one of three groups: usual care, individualized education, or individualized education with peak flow monitoring, and followed for 6 months. Data were collected from January to December 2006. The variables studied included demographic data, asthma self-care competence, asthma self-efficacy, and asthma self-care behaviour. FINDINGS. Patients in both individualized education groups reported higher asthma self-care competence scores (F = 334.06 and 481.37, P < 0.001) and asthma self-care and self-efficacy scores (F = 104.08 and 68.42, P < 0.001) than patients in the usual care group. In addition, patients who received individualized education with peak flow monitoring had statistically significantly higher asthma self-care behaviour and self-efficacy scores (P < 0.001) and asthma control indicators (P = 0.025) than the education alone group. No differences were found among the three groups in unscheduled health service usage.

CONCLUSION

Our results suggest that individualized education helps older people with asthma to enhance their self-care behaviours, manage their disease, and increase their quality of life.

Optimal management of asthma in elderly patients: strategies to improve adherence to recommended interventions

Adherence to asthma medications presents a problem in all age groups, and older people with chronic illnesses such as asthma also have multiple co-morbidities and consequently complex healthcare needs. It has been suggested that older people are also less likely to adhere to medication and treatment than younger people. Although the prevalence of asthma in older people is similar to that of the general population, over two-thirds of those who die from asthma are >50 years of age and there is strong evidence for under-diagnosis. Clinicians therefore face specific challenges in providing healthcare with respect to both asthma diagnosis and treatment in older age groups. Non-adherence to medication can be defined as either 'intentional' or 'unintentional'. Unintentional non-adherence is more likely to be associated with sociodemographic or physical barriers to the use of medication. Intentional non-adherence results from the balance of individual reasoning of risks versus the benefits of taking medication and acceptance of asthma diagnosis. Intentional non-adherence can be addressed through strategies that influence health beliefs and concerns about the adverse effects of medicine. Unintentional adherence can be addressed by assessing and educating the patient in relation to device use and providing education and clear written instructions about medication requirements. However, some barriers to medication use, such as financial ones, may be systematic. Most studies of medication use, efficacy, adverse effects and adherence in patients with asthma primarily involve younger people. Studies of strategies to improve asthma adherence outcomes specifically in older people are urgently needed.

Validation of The 30 Second Asthma Test as a measure of asthma control

BACKGROUND

The primary objective of asthma management is to help patients establish and maintain optimal disease control. Simple and efficient tools are needed to assess patient-reported symptoms so that they can be used with or without airway function to evaluate asthma control.

OBJECTIVE

The objective of the present study was to evaluate the validity of The 30 Second Asthma Test (GlaxoSmithKline Inc, Canada), based on the Canadian Asthma Guidelines, by estimating its relationship with criterion measures of control.

RESULTS

The discriminative and diagnostic validity of The 30 Second Asthma Test was examined in a sample of 81 patients with a confirmed diagnosis of asthma. Based on a cut-off score of two or greater on The 30 Second Asthma Test, the overall agreement with specialist ratings was 65%, and 58% with per cent predicted forced expiratory volume in 1 s. The 30 Second Asthma Test scores distinguished between groups of patients who were classified based on the change in intensity of therapy.

CONCLUSION

The results support the use of The 30 Second Asthma Test as a brief screening tool for asthma control.