To be considered for inclusion, studies had to evaluate clinical service interventions or packages of care aimed at improving the management of patients with COPD in the community. Eligible studies included inpatient, outpatient, or community based interventions that were either nurse led, nurse coordinated, or largely delivered by nurses. (Whenever necessary we contacted authors to establish the nature of the intervention.) We excluded drug trials, hospital at home or early discharge schemes for patients with acute exacerbations, educational interventions directed solely at other healthcare providers, and studies in which a substantial proportion of patients did not have COPD.