Impact of a COPD discharge care bundle on readmissions following admission with acute exacerbation: interrupted time series analysis.

Objectives: We evaluated the impact of a COPD discharge care bundle on readmission rates following hospitalisation with an acute exacerbation.

Design: Interrupted time series analysis, comparing readmission rates for COPD exacerbations at nine trusts that introduced the bundle, to two comparison groups; (1) other NHS trusts in London and (2) all other NHS trusts in England. Care bundles were implemented at different times for different NHS trusts, ranging from October 2009 to April 2011.