RT Journal Article SR Electronic T1 The Birmingham COPD cohort study - Associations between CAT, lung health and health care use JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP P4218 VO 42 IS Suppl 57 A1 Andy Dickens A1 Peymane Adab A1 Rachel Jordan A1 Alexandra Enocson A1 Jon Ayres A1 David Fitzmaurice YR 2013 UL http://erj.ersjournals.com/content/42/Suppl_57/P4218.abstract AB Introduction:The COPD Assessment Test (CAT) gauges the impact of COPD on patients’ daily lives and now forms a key part of GOLD management recommendations. Longitudinal cohort studies are needed to better understand the utility of CAT in a primary care-based population.Aims and objectives:Using a primary care cohort, we will explore whether aspects of lung health and health care use are associated with CAT.Methods:Patients from primary care COPD registers were recruited into a three-year cohort study. An interim dataset was used to assess associations between CAT scores, lung health and health care use at baseline.Results:600 patients have been recruited so far, of which 13% had FEV1/FVC>70% and 73.4% fulfilled the LLN criteria for COPD. Patients with confirmed COPD had a mean CAT score of 20.4 (SD 9.0). Forced expiratory volume in 1 second (FEV1) % predicted was negatively associated with CAT (p<0.001), while dyspnoea severity, number of exacerbations and co-morbidities were positively associated at p<0.001. Accident & Emergency attendances (p<0.001) and hospital admissions (p<0.01) were also associated with higher CAT scores. Updated analyses will be presented at the conference.Conclusions:CAT scores are strongly associated with lung health, health service use and co-morbidities. Pending longitudinal analysis, the data suggest CAT is useful in early identification of patients at risk of hospitalisation.