Outcome measures will be submitted elsewhere. The following parameters describe the participating patient group: Sex, age, civil status, socio - economic status, Body Mass Index (BMI), forced expiratory volume in one 1 second (FEV1) of expected value, FEV1 / forced vital capacity (FVC), Medical Research Council Breathlessness Scale (MRC- dyspnea score), oxygen treatment in the home, treatment with atomizer, the usual inhaled COPD treatment (grouped), oral prednisolone treatment, home care, use of tobacco.