EDITORIALS
COPD, diagrams and traditions: time to move on?
Correspondence to:
Professor J Vestbo, Respiratory Research Group, ERC Building, 2nd Floor, Wythenshawe Hospital, Southmoor Road, Manchester M23 9LT, UK; jorgen.vestbo@manchester.ac.uk
| The first 150 words of the full text of this article appear below. |
The non-proportional Venn diagram explaining the components of chronic obstructive pulmonary disease (COPD) has been a graphical "COPD evergreen" along the Fletcher-Peto curve ever since it was proposed by Snider.1 The diagram has very much been intended as a way of visualising the concepts behind the processes contributing to COPD, but over the last few years there has been a growing interest in quantifying the various components of the diagram.2 3 These studies have used registered administrative diagnoses or self-reported diagnoses with the possibilities that errors in diagnostic labelling may have introduced significant bias. In this issue of Thorax Marsh et al4 present a proportional Venn diagram based on clinical data, pulmonary function measurements and CT findings from an ongoing population study in New Zealand (see page 761).
Marsh et al found that asthma was a significant cause of COPD in their general population sample; 55% of patients with
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Thorax 2008 63: 761-767.[Abstract] [Full Text] [PDF]
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