Is asthma being overdiagnosed?

A potentially alarming figure that emerged in the UK news last week was that “1 million” UK adults may have been wrongly diagnosed with asthma – a claim reported in various forms by BBC News, The Guardian, The Daily Telegraph, the Daily Mirror and the Mail Online.  The headlines followed the publication of new draft guideline (PDF, 670kb) from the National Institute for Health and Care Excellence (NICE) on the diagnosis and management of asthma. Most of the media articles were true to the facts and explained that the guideline was aiming to improve asthma care by improving the accuracy of diagnosis. So, where did the figure of 1 million come from? All the UK press rallied round a statement in the draft guideline that said: “studies of adults diagnosed with asthma suggest that up to 30% do not have clear evidence of asthma”. What followed was clearly a “back of the envelope” calculation extrapolating this to the number of people receiving treatment for asthma in the UK, which is around 4.1 million. This gave the magic figure of 1.23 million potentially misdiagnosed people. Unfortunately, the 30% figure in the draft guideline is not referenced, so we can’t find out how accurate it is. We also don’t know whether it applies to specific asthma subgroups, such as those of a specific age, or the severity of a person's symptoms. This makes it difficult to assess whether this calculation is accurate, or even reasonable. The charity Asthma UK responded in a b...
Source: NHS News Feed - Category: Consumer Health News Source Type: news