Smoking severity and GOLD-COPD Grade
Glutathione-S-transferases in lung and sputum specimens, effects of smoking and COPD severity
10
Dual polarization of human alveolar macrophages progressively increases with smoking and COPD severity
8
The effect of changes to GOLD severity stage on long term morbidity and mortality in COPD
10
Impact of using the new GOLD classification on the distribution of COPD severity in clinical practice
6
<p>Variation in Assignment of the COPD Patients into a GOLD Group According to Symptoms Severity</p>
9
COPD exacerbations by disease severity in England
13
Identification of genetic variants in the <em>TNF</em> promoter associated with COPD secondary to tobacco smoking and its severity
11
Comorbidities and COPD severity in a clinic-based cohort
10
Smoking Cessation Interventions for COPD: A Review of the Literature
10
Smoking cessation affects the natural history of COPD
6
Systemic inflammation in COPD in relation to smoking status
6
Application of the new GOLD COPD staging system to a US primary care cohort, with comparison to physician and patient impressions of severity
10
COPD assessment test and severity of airflow limitation in patients with asthma, COPD, and asthma–COPD overlap syndrome
9
Effects of long-acting bronchodilators in COPD patients according to COPD severity and ICS use
10
Smoking history and emphysema in asthma–COPD overlap
10
Health-related quality of life is related to COPD disease severity
8
Multiple biomarkers predict disease severity, progression and mortality in COPD
10
Effects of aclidinium on determinants of COPD severity: symptoms and quality of life
8
Adjusting for COPD severity in database research: developing and validating an algorithm
10
Active smoking and COPD phenotype: distribution and impact on prognostic factors
11