Participants
ACUTE EXACERBATION OF COPD, SECONDARY
In total, 4491 potential participants were approached in person by clinicians as they attended primary, community or secondary care clinics, during admission for an acute exacerbation of COPD, or by invitation letter from their general practitioner (Trial profile. Median (interquartile range) age at baseline was 69 (62–75) years, 213 (50%) were male and 176 (42%) lived alone (Baseline characteristics and questionnaire responses by treatment allocationData are presented as median (interquartile range), n (%) or mean±