ConclusionsIn addition to increasing awareness of parents to symptoms in their asthmatic children, physicians should question the child appropriately, as well as using the children's responses to C‐ACT as an information source for properly assessing asthma control. Pediatr Pulmonol. © 2013 Wiley Periodicals, Inc. (Source: Pediatric Pulmonology)

Patients with chronic obstructive pulmonary disease (COPD) and concomitant asthma have significantly more exacerbations and hospitalizations than patients with COPD alone, research shows.

Ana Maria Menezes (Federal University of Pelotas, Brazil) and colleagues examined data from the Latin American Project for the Investigation of Obstructive Lung Disease (PLATINO) study. They found that out of 5044 participants who underwent pre- and post-bronchodilator spirometry, 12% had COPD alone, 1.7% had asthma alone, and 1.8% had COPD–asthma overlap.

Out of all affected patients, those in the overlap group had the highest percentage of cough and phlegm symptoms, the highest use of respiratory medication, were the most likely to have previously undergone spirometry, and to have had a physician diagnosis of asthma. Additionally, they had the lowest values for several lung function parameters, including pre- and post-bronchodilator forced expiratory volume in 1 second (FEV1), and FEV1 to forced vital capacity ratio.

The rate of exacerbations in the past year was lowest in the COPD-only group at 5.2%. Compared with these patients, those with COPD–asthma overlap were 2.1-fold more likely to have had at least one exacerbation in the past year, at a rate of 15.7%, after adjusting for confounders. Patients with asthma alone were also more likely to experience exacerbations than those with COPD, at 13.1%, but in multivariate analysis this did not reach statistical significance.

Additionally, patients in the overlap group were 4.1 times more likely to have been hospitalized in the past year than those with COPD (5.6 vs 1.2%), while there were no hospitalizations among asthma patients.

And, while a similar proportion of patients from each group experienced limitations due to their physical health, at around 30%, patients with COPD–asthma overlap were nearly 50% more likely to report their general health status as fair or poor compared with patients with COPD alone (53.9 vs 34.0%).

Writing in Chest, Menezes and colleagues say that their study “suggests that coexisting COPD–Asthma is possibly associated with increased disease severity, as well as worse health status.”

“However,” they add, “it remains unclear which are the pathogenic characteristics of this group, the stability of the phenotype over time, the best treatment and the long-term prognosis of these individuals.”

Related Articles

Identification and treatment of comorbidities in idiopathic pulmonary fibrosis and other fibrotic lung diseases.

Curr Opin Pulm Med. 2013 Sep;19(5):466-73

Authors: King C, Nathan SD

Abstract
PURPOSE OF REVIEW: The interstitial lung diseases (ILDs) frequently result in considerable disability and reduced survival in affected patients. Unfortunately, they are often poorly responsive to available therapies. Comorbidities, both pulmonary and nonpulmonary, frequently accompany ILDs and contribute to adverse outcomes.
RECENT FINDINGS: Multiple comorbidities, including gastroesophageal reflux disease, venous thromboembolism, coronary artery disease, sleep-disordered breathing, depression, emphysema, pulmonary hypertension, and lung cancer contribute to the morbidity and mortality of fibrotic lung disease.
SUMMARY: The identification and treatment of comorbidities may improve morbidity and potentially impact mortality in patients with ILD. A high index of suspicion and an awareness of the spectrum of comorbidities are important in optimizing outcomes in this group of patients.

PMID: 23912191 [PubMed - in process]