Childhood asthma rates down 10 percent in 10 years according to UK's oldest asthma survey

Childhood asthma rates down 10 percent in 10 years according to UK's oldest asthma survey

Asthma rates in children have dropped by more than 10 percent in ten years according to the first and longest running asthma survey in the UK which itself is now 50 years old.

Whilst asthma rates have dropped sharply since a peak of almost 30% in 2004, rates of hay fever and eczema in the same sample of children have stayed relatively static over the same time period.

Run by researchers from the University of Aberdeen - The Aberdeen School Asthma Study was first completed  in 1964 and exactly the same questions have been answered by parents of children aged 9-12 years attending  the same city primary schools in 1989 and every five years since.

The previous findings are known to act as an excellent barometer for asthma rates in children across Western Europe.

3,935 surveys were completed by parents of children at 41 schools across Aberdeen. The results have formed the basis of a paper which has been published this month in the British Medical Journal Open.

Dr Steve Turner, Senior Clinical Lecturer in Child Health at the University of Aberdeen, says: “There are likely to be a number of contributing factors to the drop in instances of asthma among school children in Aberdeen, and indeed across Western Europe.

“Some of the apparent drop is down to more careful diagnoses being made nowadays. In years gone by asthma was perhaps being diagnosed more freely than it ought to have been.

“There have also been clear changes in our environment - from diet, to the air we breathe. Some might even be tempted to say the smoking ban could be part of it, but we don’t know for certain.

“Asthma is typically thought of as being an allergic condition, and allergy also causes hay fever and eczema. However, if asthma rates are dropping and hay fever and eczema aren’t, it suggests that allergy may not be that important to asthma after all.”

The questionnaires’ format has remained completely unchanged in the 50 years since it was first sent home with Aberdeen school children. It is highly likely that some of the children involved in this latest survey will be third generation of their family to take part in the study.

The survey asks parents four simple questions to indicate if their child has suffered or does suffer from asthma, hay fever, eczema or wheeze.

It is the first published childhood asthma prevalence survey of any UK population since the Aberdeen team’s last survey in 2009.

Professor Devereux, the Professor of respiratory medicine at the University of Aberdeen, says:  “Prevalence of asthma is down – but is still nearly double the rate it was in 1989 (10.3%) and is far higher than the rate recorded 50 years ago in the first study (4.1%).

“These surveys have given us incredibly helpful insights to asthma prevalence in Aberdeen over the years. And if you plot that prevalence over time against other studies, asthma frequency elsewhere shadows that in Aberdeen with uncanny precision.”

Chest Heart and Stroke Scotland (CHSS) have supported the Aberdeen School Asthma Survey with funding of nearly £60,000.

CHSS Respiratory Coordinator Lorna Stevenson said: “Whilst it’s good news that rates of asthma have fallen in the last ten years, nevertheless it’s important that teachers and the parents of children with asthma have a good understanding of the condition and how to keep children healthy and safe. 

“CHSS is delighted to have funded this important study and we have recently launched a new website, for people with COPD and asthma. This includes practical advice and information for the parents of children with asthma.”

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