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Researcher found that the risk of developing asthmatic symptoms was the same for both pre-school and school-age children.
Study leader Dr Jasper Been, from the University of Edinburgh's Centre for Population Health Sciences, said:
The researchers studied data on around 1.5 million children pooled from 30 studies from six continents. Four of the research papers were from the UK.
Scientists say that with increasing numbers of babies surviving premature birth, childhood asthma is set to become a significant health problem.
The research showed that average asthma rates rose to 14% in babies born prematurely, defined as at least three weeks early.
Those born more than three weeks before the usual 40-week pregnancy term were almost 50% more likely than full-term babies to develop asthma. And babies born more than two months early were three times more at risk.
New research has shown that being born prematurely can triple a baby's risk of developing childhood asthma, new research has shown.
A study suggests the link between pre-term birth and asthma, or wheezing conditions, is higher than was previously thought.
Asthma is already the most common chronic disease in childhood, affecting around 8% of offspring born after a normal-length pregnancy.