Login to your account

Username *
Password *
Remember Me

Blog With Right Sidebar

Progression from Asthma to Chronic Obstructive Pulmonary Disease (COPD): Is Air Pollution a Risk Factor?

Individuals with asthma chronic obstructive pulmonary disease (COPD) overlap syndrome (ACOS), have more rapid decline in lung function, more frequent exacerbations and poorer quality of life than those with asthma or COPD alone. Air pollution exposure is a known risk factor for asthma and COPD; however, its role in ACOS is not as well understood.
OBJECTIVES: To determine if individuals with asthma exposed to higher levels of air pollution have an increased risk of ACOS.

METHODS: Individuals who resided in Ontario, Canada aged ≥18 years in 1996 with incident asthma between 1996 and 2009 and participated in the Canadian Community Health Survey (CCHS) were identified and followed until 2014 to determine the development of ACOS. Data on exposures to fine particulate matter (PM2.5) and ozone (O3) were obtained from fixed monitoring sites. Associations between air pollutants and ACOS were evaluated using Cox regression models.

MEASUREMENTS AND MAIN RESULTS: Of the 6,040 adults with incident asthma who completed the CCHS, 630 were identified as ACOS cases. Compared to non-ACOS, the ACOS population had later onset of asthma, higher proportion of mortality, and more frequent ED visits prior to COPD diagnosis. The adjusted hazard ratios (HR) of ACOS and cumulative exposures to PM2.5 (per 10 µg/m(3)) and O3 (per 10 ppb) were 2.78 (CI: 1.62-4.78) and 1.31 (CI: 0.71-2.39) respectively.

CONCLUSIONS: Individuals exposed to higher levels of air pollution had nearly 3-fold greater odds of developing ACOS. Minimizing exposure to high levels of air pollution may decrease the risk of ACOS.

A systematic review with meta-analysis of dual bronchodilation with LAMA/LABA for the treatment of stable chronic obstructive pulmonary disease.

Related Articles
 

The wide availability of LAMA/LABA FDCs in the absence of head-to-head comparative pragmatic trials makes difficult the choice of the combination to be used. Therefore, we carried out a systematic review with meta-analysis that incorporated the data from trials lasting at least 3 months to evaluate the effectiveness of LAMA/LABA FDCs for COPD treatment.

METHODS: RCTs were identified searching from different databases of published and unpublished trials. We aimed to assess the influence of LAMA/LABA combinations on trough FEV1, TDI, SGRQ and cardiac safety vs. monocomponents.
RESULTS: Fourteen papers and 1 congress abstract with 23,168 COPD patients (combinations n=10,328, monocomponents n=12,840) were included in this study. Our results showed that all LAMA/LABA combinations were always more effective than the LAMA or LABA alone in terms of the improvement in trough FEV1. Although there was not significant difference among LAMA/LABA combinations, we identified a gradient of effectiveness among the currently available LAMA/LABA FDCs. LAMA/LABA combinations also improved both TDI and SGRQ scores, and did not increase the cardiovascular risk when compared with monocomponents.

CONCLUSIONS: The gradient of effectiveness emerging from this meta-analysis is merely a weak indicator of possible differences between the various LAMA/LABA FDCs. Only direct comparisons will document if a specific LAMA/LABA FDC is better than the other. In the meanwhile, we think it is only proper consider the dual bronchodilation better than a LAMA or a LABA alone, regardless of drugs used.

Safety Considerations with Dual Bronchodilator Therapy in COPD: An Update.

Combining a long-acting β2-agonist (LABA) with a long-acting anti-muscarinic agent (LAMA) provides synergistic benefit on airway smooth muscle relaxation, which may have major implications for the use of LABA/LAMA combinations in the treatment of chronic obstructive pulmonary disease (COPD).

There are four different approved LAMA/LABA fixed-dose combinations (FDCs)-glycopyrronium/indacaterol, umeclidinium/vilanterol, tiotropium/olodaterol, and aclidinium/formoterol-and another, glycopyrronium/formoterol, that is still under clinical development. Many pivotal trials have shown that all of these FDCs are more effective than monotherapies in inducing bronchodilation and do not amplify the possible adverse events (AEs) that are characteristic of LAMAs and LABAs when used as monotherapy. Unfortunately, these clinical trials have included a very small and highly selected fraction of the COPD patient population. Therefore, it is questionable whether such data can be extrapolated to a larger, 'real-life' population of patients with COPD, especially given that COPD patients with co-morbidities are often excluded from clinical trials, COPD is a major risk factor for most cardiovascular diseases, and both LAMAs and LABAs have a high potential to impact cardiac activities. All clinical trials have been conducted under widely varying conditions and, consequently, AE rates of a drug observed in a clinical trial cannot be directly compared with rates in the clinical trials of another drug and may not reflect the rates observed in practice.

Head-to-head studies comparing the different LAMA/LABA FDCs that will include the true patients that we meet in our everyday practice are absolutely essential if we wish to make a therapeutic choice that is not purely empirical.

Feasibility of spirometry in primary care to screen for COPD: a pilot study.

COPD is a frequent but underdiagnosed disease whose diagnosis relies on the spirometric demonstration of bronchial obstruction. Spirometry use by general practitioners could represent the first line in COPD diagnosis.
OBJECTIVE: Because duration of spirometry is retarding its development in primary care, we decided to measure the time it requires in the primary-care context in France.

METHODS: Ten volunteer general practitioners were trained during two 3-hour theoretical and practical continuing education sessions. Then, from October 2013 to May 2014, they included patients without any known respiratory disease but at risk of developing COPD (age: ≥40 years, smoker: ≥20 pack-years). The duration of spirometry and its quality were evaluated according to the following acceptability criteria: 1) expiration ≥6 seconds or reaching a plateau; 2) good start with an early peak flow, curve peaked on top and not flat; 3) no artifacts; and 4) reproducibility criteria, ie, forced expiratory volume in 1 second and forced vital capacity differences between the two best spirometry curves ≤0.15 L. Quality of the spirograms was defined as optimal when all the criteria were met and acceptable when all the criteria were satisfied except the reproducibility criterion, otherwise, it was unacceptable.

RESULTS: For the 152 patients included, the 142 assessable spirometries lasted for 15.2±5.9 minutes. Acceptability criteria 1-3, respectively, were satisfied for 90.1%, 89.4%, and 91.5% of patients and reproducibility criterion 4 for 56.3%. Quality was considered optimal for 58.5% of the curves and acceptable for 30.2%.

CONCLUSION: The duration of spirometry renders it poorly compatible with the current primary-care practice in France other than for dedicated consultations. Moreover, the quality of spirometry needs to be improved.

Strategies to improve anxiety and depression in patients with COPD: a mental health perspective.

Chronic obstructive pulmonary disease (COPD) is a chronic inflammatory lung disease characterized by progressive and only partially reversible symptoms. Worldwide, the incidence of COPD presents a disturbing continuous increase. Anxiety and depression are remarkably common in COPD patients, but the evidence about optimal approaches for managing psychological comorbidities in COPD remains unclear and largely speculative.

Pharmacological treatment based on selective serotonin reuptake inhibitors has almost replaced tricyclic antidepressants. The main psychological intervention is cognitive behavioral therapy. Of particular interest are pulmonary rehabilitation programs, which can reduce anxiety and depressive symptoms in these patients. Although the literature on treating anxiety and depression in patients with COPD is limited, we believe that it points to the implementation of personalized strategies to address their psychopathological comorbidities.

Search