Please select the eligibility criteria that correspond to the clinical trial below.
Title: Effect of Roflumilast on Exacerbation Rate in Patients With Chronic Obstructive Pulmonary Disease. A 52 Weeks Double Blind Study With 500mcg Roflumilast Once Daily Versus Placebo. Ratio-Study.
Brief Summary: The purpose of this study is to investigate the effect of 500mcg roflumilast vs placebo on exacerbation rate and pulmonary function as well as quality of life in patients with chronic obstructive pulmonary disease (COPD).


Options:
A: Main Inclusion Criteria:

* COPD patients having at least one exacerbation within last year
* FEV1/FVC ratio (post-bronchodilator) ≤ 70%
* FEV1 (post-bronchodilator) ≤ 50% of predicted

Main Exclusion Criteria:

* COPD exacerbation not resolved at first baseline visit
* Diagnosis of asthma and/or other relevant lung disease
B: Main Inclusion Criteria:

* FEV1/FVC ratio (post-bronchodilator) ≤70%
* FEV1 (post-bronchodilator) ≤50% of predicted
* Current smoker or ex-smoker
* Clinically stable COPD indicated by no exacerbation and no change in COPD treatment of within 4 weeks prior to baseline
* Availability of a chest x-ray dated a maximum of 6 months prior to study baseline visit B0 or a willingness to have a chest x-ray performed before baseline

Main Exclusion Criteria:

* COPD exacerbation indicated by a treatment with systemic glucocorticoids not stopped 4 weeks prior to baseline
* Lower respiratory tract infection not resolved 4 weeks prior to baseline
* Diagnosis of asthma and/or other relevant lung disease
* Known alpha-1-antitrypsin deficiency
* Need for long-term oxygen therapy defined as ≥16 hours/day
C: Inclusion Criteria:

* Moderate-severe COPD (Global inititiative for chronic Obstructive Lung Disease, GOLD, 2003 definition)
* Smoking history of at least 10 pack-years

Exclusion Criteria:

* Any significant co-morbid disease
* Use of any maintenance therapy except short acting bronchodilators
D: Inclusion Criteria:

* 1. Male or female patients at least 40 years of age
* 2. History of COPD (according to Global Initiative for Chronic Obstructive Lung Disease \[GOLD\] 2010) for at least 12 months prior to Screening (Visit 1) associated with chronic productive cough for 3 months in each of 2 consecutive years (with other causes of productive cough excluded). Only patients with chronic bronchitis will be included (concomitant emphysema is permitted)
* 3. Forced expiratory volume after 1 second (FEV1)/forced vital capacity (FVC) ratio (postbronchodilator) \< 70% at Screening (Visit 1)
* 4. FEV1 (postbronchodilator) ≤ 50% of predicted at Screening (Visit 1)
* 5. At least two documented moderate or severe COPD exacerbations within 12 months prior to Screening (Visit 1)
* 6. Patients must be on FDC LABA/ICS treatment ≥ 3 months prior to Screening (Visit 1)
* 7. Former smokers (defined as smoking cessation at least 1 year ago) or current smokers (including patients who ceased smoking within the past year) both with a smoking history of at least 20 pack-years

Exclusion Criteria:

* 1. Moderate or severe COPD exacerbation and/or COPD exacerbations treated with antibiotics or systemic glucocorticosteroids within 4 weeks of Screening (Visit 1) (ie, patients must be clinically stable)
* 2. Known alpha-1-antitrypsin deficiency
* 3. Current diagnosis of asthma (either controlled or uncontrolled) (Note: History of childhood asthma is not exclusionary.)
* 4. Body mass index (BMI) ≥ 45 kg/m2
* 5. Patients with a history (within 5 years) or current diagnosis of cancer other than basal or squamous cell skin cancer

Answer: B