Association of asthma education with asthma control evaluated by asthma control test, FEV1, and fractional exhaled nitric oxide

Small airway dysfunction and poor asthma control: a dangerous liaison

Asthma is a common chronic condition, affecting approximately 339 million people worldwide. The main goal of the current asthma treatment guidelines is to achieve clinical control, encompassing both the patient symptoms and limitations and the future risk of adverse asthma outcomes. Despite randomized controlled trials showing that asthma control is an achievable target, a substantial proportion of asthmatics remain poorly controlled in real life. The involvement of peripheral small airways has recently gained greater recognition in asthma, and many studies suggest that the persistent inflammation at these sites leads to small airway dysfunction (SAD), strongly contributing to a worse asthma control. Overall, the impulse oscillometry (IOS), introduced in the recent years, seems to be able to sensitively assess small airways, while conventional spirometry does not. Therefore, IOS may be of great help in characterizing SAD and guiding therapy choice. The aim of this article is to review the literature on SAD and its influence on asthma control, emphasizing the most recent evidence.

Theoretical asthma self-management program for Taiwanese adolescents with self-efficacy, outcome-expectancy, health behaviour, and asthma symptoms: A randomized controlled trial

Background

The asthma prevalence of Taiwanese adolescents continued to rise. With physical and psychological changes in adolescents, managing asthma can be quite challenges and affect social, emotional and physical wellbeing. Adolescents with high self-efficacy levels are more likely to be involved in prevention and management activities. The aim of this study was to develop an effective asthma self-management program taking account for adolescents' developmental stages and based on Bandura's self-efficacy model.

Methods

A two-arm, parallel group, randomized controlled trial was used. The outcomes were self-efficacy, outcome-expectancy, asthma prevention and self-management behaviour, and controlling asthma symptoms. Translation and back-translation process were used for original tools in English. Good consistent reliabilities of Chinese versions tools were identified. A t-test or Mann-Whiney U test was employed to determine any mean differences of outcome variables between groups overtime.

Results

A sample of 83 patients completed the study. The mean age was 14.2 years (SD = 1.8). Approximately 56.6% of the participants were males. 73% of participants (n = 61) had a mild to intermittent level of asthma severity. Significant improvements were found on self-efficacy, t = −2.8; outcome-expectancy, U = 646, prevention behaviours, t = −3.5, and management behaviours, t = −3.2, but non-significant results for the outcome of asthma control, U = 716.

Conclusions

The results provided evidence to support the efficacy of the asthma self-management program. The findings indicated the program improved adolescents’ self-confidence in managing their asthma symptoms. Future clinical practice should consider delivering an educational program using multifaceted and interactive learning strategies.

The Fraction Exhaled Nitric Oxide as a Biomarker of Asthma Control

INTRODUCTION AND OBJECTIVE

The main goal of asthma treatment is to achieve and maintain clinical control of the disease. The exhaled fraction nitric oxide (FeNO) level is a biomarker of T-helper cell type 2 (Th2) inflammation of the airways. Our objective was to determine whether the FeNO level can be used to discriminate between patients with controlled, partially controlled, and uncontrolled asthma.

MATERIALS AND METHODS

The FeNO level and asthma control were evaluated in a retrospective and analytic cross-sectional study through data collected from asthmatic patients who were assessed by clinical history, asthma control, physical examination, spirometry, and FeNO level. Asthma control was determined by the criteria of the Global Initiative for Asthma and classified as controlled asthma, partially controlled asthma, and uncontrolled asthma. The FeNO values were classified as low (<25 ppb) or intermediate/high (⩾25 ppb) based on the American Thoracic Society recommendations.

RESULTS

The symptoms of 81 asthmatic patients were classified as controlled (34 [42%] patients), partially controlled (27 [33.3%] patients), and uncontrolled (20 [24.7%] patients). The FeNO level discriminated between the uncontrolled and controlled groups (P = .01) and between the uncontrolled and partially controlled groups (P = .01), but not between the controlled and partially controlled groups (P = .98). An FeNO level >30 ppb was associated with uncontrolled asthma (P = .0001) with an area under the receiver operating characteristic curve of 0.78 (95% confidence interval = 0.65-0.89).

CONCLUSIONS

FeNO level could be helpful in determining asthma control as >30 ppb was associated with uncontrolled asthma.

The clinical role of fractional exhaled nitric oxide in asthma control

BACKGROUND

The potential role and characteristics of fractional exhaled nitric oxide (FeNO) remain unclear in the treatment of asthma.

OBJECTIVE

To explore the clinical role of FeNO in asthmatic treatment.

METHODS

We evaluated whether the mean or change of FeNO levels in the treatment period is associated with other conventional control parameters and predicted some clinical outcomes of asthma. We retrospectively analyzed the mean and percentage change of FeNO levels in the first 5 measurements at our hospital.

RESULTS

The study found a significantly strong correlation between FeNO level at diagnosis and the largest changes of FeNO values from diagnosis. No significant correlations were observed between FeNO levels and other parameters (Asthma Control Test [ACT] score or forced expiratory volume in one second [FEV₁]) in mean and percentage change of values under treatment of asthma; however, significant positive correlations were found between ACT scores and FEV₁. The mean FeNO level revealed a significant negative correlation with an annual change in FEV₁ in individuals with asthma who were followed up for more than 2 years. Both the mean ACT score and percent predicted FEV₁ revealed a significant negative correlation with occasional use of systemic corticosteroids.

CONCLUSION

During conventional treatment of asthma, the largest changes of FeNO values from diagnosis were strongly correlated with FeNO levels at diagnosis. As for the unlikely conventional parameters, no significant associations were observed between FeNO levels and deterioration of asthma during the treatment periods. An elevated mean FeNO level may be a marker of decreased lung function in individuals with asthma.

Factors affecting quality of life of asthma patients in Spain: the importance of patient education

OBJECTIVES

Assessment of demographic and clinical factors that have an impact on the quality of life (QoL) of patients with asthma in Spain.

PATIENTS AND METHODS

Multicenter, prospective, observational, cohort study, conducted in 40 Spanish Pneumology Units during a 12-month period. Data on sociodemographic, clinical variables, asthma treatment and QoL were collected in a case report form.

RESULTS

536 patients (64.6% women, mean age: 54) were recruited. Reported QoL was better for patients from Northern and Central Spain as compared with those from the South and the East (p<0.001), students and employed patients as compared with housewives and unemployed (p<0.01), for those who had received asthma information (p<0.01), for those with milder daytime symptoms (p<0.01) and for patients with higher level of education (p<0.05).

CONCLUSIONS

Among the factors that have a significant effect on patients' QoL only symptom control and patient education on asthma control are modifiable. Therefore, all the strategies should be tailored to improve such factors when managing asthma patients.

Absence of gargling affects topical adverse symptoms caused by inhaled corticosteroids in females

OBJECTIVE

Topical adverse events caused by inhaled corticosteroids (ICS) are suspected to be more common in females. Although gargling or mouth washing after inhalation is recommended as the gold standard for preventing adverse events due to ICS, the preventive effects of this method have not been confirmed in real-world studies. This study aimed to examine the association between gargling or mouth washing and the incidence of topical adverse symptoms in males and females in daily practice.

METHODS

We analyzed a subpopulation of participants in the Drug Event Monitoring (DEM) project of the Japan Pharmaceutical Association. An anonymous survey was performed in February 2010, to assess the self-perception of topical adverse symptoms during ICS use by conducting interviews of pharmacists using structured questionnaires.

RESULTS

A total of 412 males and 480 females were included. The patients used a dry-powder inhaler (DPI) (71.2%), pressurized meter-dose inhaler (pMDI) with (7.5%) or without (16.6%) a spacer or inhalation solution (4.7%) as the delivery device. Topical adverse symptoms occurring after previous prescriptions were reported by 41 (4.6%) subjects. The common symptoms were hoarseness, stomatitis and dry mouth (1.3%, 1.1% and 1.1%, respectively). In the multiple regression model, the presence of symptoms was found to be significantly associated with the absence of gargling or mouth washing after inhalation [adjusted odds ratio (OR): 3.75, 95% confidence interval (95%CI): 1.33-10.59, p = 0.012]. When stratified by gender, the absence of gargling or mouth washing was identified to be a risk factor in females only (OR: 4.32, 95%CI: 1.11-16.87, p = 0.035) and not in males (OR: 3.26, 95%CI: 0.65-16.33, p = 0.151). Furthermore, the association between the absence of gargling or mouth washing and the incidence of topical adverse symptoms was significant in the patients using DPI (OR: 4.85, 95%CI: 1.66-14.14, p = 0.004), but not in those using the other devices.

CONCLUSIONS

In this study, the absence of gargling or mouth washing after ICS use was associated with topical adverse symptoms, especially in females. To achieve good adherence to treatment and improve the quality of life, female patients with asthma should strictly practice the gargling or mouth washing method.