Phenotype 1: young/severe | Phenotype 2: old/mild | Phenotype 3: young/moderate | Phenotype 4: old/severe | |
Age | Young | Old | Young | Old |
Respiratory disease# | Very severe | Mild | Moderate | Moderate |
Nutritional status | Underweight | Overweight | Normal | Overweight |
Chronic heart failure | None | None | None | Frequent |
Depression | Very frequent | None | None | Frequent |
HRQoL impairment | Very severe | Mild | Moderate | Severe |
HRQoL: health-related quality of life. #: taking into account airflow obstruction, dyspnoea and exacerbation rate.