Philosophical ruminations on measurement: methodological orientations of patient reported outcome measures (PROMS)

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Declaration of interest

JN is part-funded by, and John Strang is supported by, the National Institute for Health Research (NIHR) Biomedical Research Centre for Mental Health at South London and Maudsley NHS Foundation Trust and King's College London. John Strang is a clinician and has had, and continues to have, clinical responsibilities and has also worked with a range of types of treatment and rehabilitation service-providers. He has also worked with pharmaceutical companies to seek to identify new or improved treatments, and also with a range of governmental and non-governmental organisations. A fuller account is given on his personal university webpage at: http://www.kcl.ac.uk/ioppn/depts/addictions/people/hod.aspx. The views expressed are those of the authors and not necessarily those of the NHS, the NIHR or the Department of Health.