the questionnaire MDP will be administered at the day of hospital admission and at the day of discharge.

the questionnaire MDP will be administered at the day of hospital admission and at the day of discharge.

In stable state of COPD, the questionnaire MDP will be administered once during a routine control visit at the hospital or the medical practice.

The questionnaire MDP will be administered once during the first visit in the sleep laboratory.

The Multidimensional Dyspnea Profile measures the intensity of dyspneic breathing discomforts. It tests five sensory qualities that describe the patient's dyspnea in its respective intensity. Additionally it includes five potential reactions. The MDP is designed to refer to a specific event of time.

A1, Scale: Scale about breathing sensations with a defined start- and endpoint (neutral - unbearable). Values reach from 0-10, and higher values represent a worse outcome.

SQ1 (sensoric quality), Choice: 5 Phrases and terms about breathing sensations. Choose between yes and no and select one as "most accurately".

SQ2 (sensoric quality), Scales: 5 subscales about intensity of breathing sensations (muscle work; air hunger; chest tightness; mental effort; breathing a lot) with defined start- and endpoints (none - as intense as imaginable). Values reach from 0 - 10, and higher values represent a worse outcome.

A2 (emotional quality), Scales: 5 subscales about emotions (depressed, anxious, frustrated, angry, afraid) with defined start- and endpoints (none - as intense as imaginable). Values reach from 0 - 10, and higher values represent a worse outcome.

comparison of the A1 and A2 (scale 0-10) and SQ2 (scale 0-10) scores of the MDP between the diseases, the evaluation of dependencies of clinical routine data with the MDP scores