One million asthma cases misdiagnosed, watchdog warns

More than 1m people being treated for asthma may have been misdiagnosed, a health watchdog has said.

The National Institute for Health and Care Excellence (Nice) said studies showed up to 30% of the 4.1m people treated for asthma in the UK did not show any “clear evidence” of the incurable condition.

The watchdog has drafted new guidance, its first for asthma, for doctors in England to improve the accuracy of diagnoses, including an array of tests.