A method to study the effect of bronchodilators on smoke retention in COPD patients: study protocol for a randomized controlled trial

Table 4 Baseline characteristics

Variables
History • COPD GOLD-classification • Pulmonary and other diseases • Smoking	Medication • Pulmonary medication • Co-medication
Pulmonary function • FEV ₁ pre- and post bronchodilation • FVC pre- and post bronchodilation • Inspiratory Vital Capacity • Total Lung Capacity • Diffusion	Pre-experiment condition check • Last smoke • Last bronchodilator use • Rescue bronchodilator last week? • Exacerbation last week?

ISSN: 1745-6215