hronic obstructive pulmonary disease (COPD) is a progressive, life-limiting respiratory condition that primarily features symptoms of breathlessness, chronic cough, fatigue and reduced mobility (Collins et al, 2012).
Currently, the prevalence of COPD in the UK is over one million people (Health and Safety Executive [HSE], 2012), and it is the fourth leading cause of death worldwide (Halbert et al, 2003).