Azim, Adnan, Mistry, Heena, Freeman, Anna, Barber, Clair, Newell, Colin, Gove, Kerry, Thirlwall, Yvette, Harvey, Matt, Bentley, Kimberley, Knight, Deborah, Long, Karen, Mitchell, Frances, Cheng, Yueqing, Varkonyi-Sepp, Judit, Grabau, Wolfgang, Dennison, Paddy, Haitchi, Hans Michael, Arshad, S Hasan, Djukanovic, Ratko, Wilkinson, Tom, Howarth, Peter and Kurukulaaratchy, Ramesh J (2019) Protocol for the Wessex AsThma CoHort of difficult asthma (WATCH): a pragmatic real-life longitudinal study of difficult asthma in the clinic. BMC Pulmonary Medicine, 19, [99]. (doi:10.1186/s12890-019-0862-2).
Abstract
BACKGROUND: Asthma is now widely recognised to be a heterogeneous disease. The last two decades have seen the identification of a number of biological targets and development of various novel therapies. Despite this, asthma still represents a significant health and economic burden worldwide. Why some individuals should continue to suffer remains unclear.
METHODS: The Wessex Asthma Cohort of Difficult Asthma (WATCH) is an ongoing 'real-life', prospective study of patients in the University Hospital Southampton Foundation Trust (UHSFT) Difficult Asthma service. Research data capture is aligned with the extensive clinical characterisation required of a commissioned National Health Service (NHS) Specialist Centre for Severe Asthma. Data acquisition includes detailed clinical, health and disease-related questionnaires, anthropometry, allergy and lung function testing, radiological imaging (in a small subset) and collection of biological samples (blood, urine and sputum). Prospective data are captured in parallel to clinical follow up appointments, with data entered into a bespoke database.
DISCUSSION: The pragmatic ongoing nature of the WATCH study allows comprehensive assessment of the real world clinical spectrum seen in a Specialist Asthma Centre and allows a longitudinal perspective of deeply phenotyped patients. It is anticipated that the WATCH cohort would act as a vehicle for potential collaborative asthma studies and will build upon our understanding of mechanisms underlying difficult asthma.
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