title: Challenges of harmonising data from UK national health surveys: a case study of attempts to estimate the UK prevalence of asthma.
authors.affiliation: Asthma UK Centre for Applied Research, Centre for Medical Informatics, Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh, EH8 9AG, UK.
authors.forename: Bright I
authors.initials: BI
authors.lastname: Nwaru
authors.affiliation: Asthma UK Centre for Applied Research, Centre for Medical Informatics, Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh, EH8 9AG, UK Edinburgh Health Services Research Unit, Centre for Population Health Sciences, The University of Edinburgh, Edinburgh, UK.
authors.forename: Mome
authors.initials: M
authors.lastname: Mukherjee
authors.affiliation: Population Health Research Institute, St George's, University of London, UK.
authors.forename: Ramyani P
authors.initials: RP
authors.lastname: Gupta
authors.affiliation: Swansea Centre for Health Economics (SCHE), College of Human and Health Science, Swansea University, UK.
authors.forename: Angela
authors.initials: A
authors.lastname: Farr
authors.affiliation: CIPHER - Centre for the Improvement of Population Health through e-Records Research, Centre for Health Information, Research and Evaluation (CHIRAL), College of Medicine, Institute of Life Science 2 (ILS2), Swansea University, UK.
authors.forename: Martin
authors.initials: M
authors.lastname: Heaven
authors.affiliation: Edinburgh Health Services Research Unit, Centre for Population Health Sciences, The University of Edinburgh, Edinburgh, UK.
authors.forename: Andrew
authors.initials: A
authors.lastname: Stoddart
authors.affiliation: CIPHER - Centre for the Improvement of Population Health through e-Records Research, Centre for Health Information, Research and Evaluation (CHIRAL), College of Medicine, Institute of Life Science 2 (ILS2), Swansea University, UK.
authors.forename: Amrita
authors.initials: A
authors.lastname: Bandyopadhyay
authors.affiliation: Swansea Centre for Health Economics (SCHE), College of Human and Health Science, Swansea University, UK.
authors.forename: Deborah
authors.initials: D
authors.lastname: Fitzsimmons
authors.affiliation: Centre for Infection and Immunity, School of Medicine, Dentistry and Biomedical Sciences, Health Sciences Building, Queen's University Belfast, UK.
authors.forename: Michael
authors.initials: M
authors.lastname: Shields
authors.affiliation: Swansea Centre for Health Economics (SCHE), College of Human and Health Science, Swansea University, UK.
authors.forename: Ceri
authors.initials: C
authors.lastname: Phillips
authors.affiliation: Swansea Centre for Health Economics (SCHE), College of Human and Health Science, Swansea University, UK.
authors.forename: George
authors.initials: G
authors.lastname: Chamberlain
authors.affiliation: Information Services Division (ISD), NHS National Services Scotland, Edinburgh, UK.
authors.forename: Colin
authors.initials: C
authors.lastname: Fischbacher
authors.affiliation: School of Geography & Geosciences, Department of Geography & Sustainable Development, The University of Edinburgh, UK.
authors.forename: Christopher
authors.initials: C
authors.lastname: Dibben
authors.affiliation: Asthma UK Centre for Applied Research, Centre for Medical Informatics, Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh, EH8 9AG, UK.
authors.forename: Chantelle
authors.initials: C
authors.lastname: Aftab
authors.affiliation: Asthma UK Centre for Applied Research, Centre for Medical Informatics, Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh, EH8 9AG, UK.
authors.forename: Colin R
authors.initials: CR
authors.lastname: Simpson
authors.affiliation: CIPHER - Centre for the Improvement of Population Health through e-Records Research, Centre for Health Information, Research and Evaluation (CHIRAL), College of Medicine, Institute of Life Science 2 (ILS2), Swansea University, UK.
authors.forename: Ronan
authors.initials: R
authors.lastname: Lyons
authors.affiliation: Population Health Research Institute, St George's, University of London, UK.
authors.forename: David
authors.initials: D
authors.lastname: Strachan
authors.affiliation: Asthma & Allergy Group, Institute of Life Science, College of Medicine, Swansea University, UK.
authors.forename: Gwyneth A
authors.initials: GA
authors.lastname: Davies
authors.affiliation: Asthma UK Centre for Applied Research, Centre for Medical Informatics, Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh, EH8 9AG, UK Edinburgh Health Services Research Unit, Centre for Population Health Sciences, The University of Edinburgh, Edinburgh, UK.
authors.forename: Brian
authors.initials: B
authors.lastname: McKinstry
authors.affiliation: Asthma UK Centre for Applied Research, Centre for Medical Informatics, Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh, EH8 9AG, UK aziz.sheikh@ed.ac.uk.
authors.forename: Aziz
authors.initials: A
authors.lastname: Sheikh
mesh_terms: D001249:Asthma / Q000453:epidemiology*; D006306:Health Surveys; D006801:Humans; D015995:Prevalence; D006113:United Kingdom / Q000453:epidemiology