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It鈥檚 well known that babies born very preterm or very low weight need help with their breathing. What wasn鈥檛 known was whether these breathing issues continued into adulthood.

However, has found that people born very preterm or with very low birthweight have a high risk of lung disease and are not reaching their full airway capacity by early adulthood.

The research found those born before 32 weeks of pregnancy or with a birthweight of less than 1501 g are four times more likely to have airflow in worrying clinical ranges in early adulthood than those born on time.

The international study, published in the latest edition of , was led by the , the and the , with collaborators from Norway, Finland, the UK and The Netherlands.

The research sourced data from 11 studies involving 935 participants who were born very preterm or with very low birthweight and 722 who were born at full term. All were aged between 16 and 33. Lead researcher Professor Lex Doyle said many people born very preterm or with very low birthweight will develop chronic obstructive pulmonary disease (COPD), which blocks airflow and makes it difficult to breathe.

Prof Doyle said the likelihood was even higher if they had bronchopulmonary dysplasia 鈥� a form of lung injury that affects newborn babies 鈥� or were exposed to tobacco smoke or other pollutants.

鈥淭he reductions in their airflow capacity in adolescence and early adulthood were substantial and a significantly higher proportion had expiratory flow rates (exhaling speed) in concerning clinical ranges compared with those born on time,鈥� he said.

Prof Doyle said babies born very preterm or with very low birthweight often required help with breathing problems after birth, such as assisted ventilation or oxygen treatment, and many would develop bronchopulmonary dysplasia.

鈥淭hey go on to have reduced airflow through childhood compared with children born on time or of normal birthweight,鈥� he said.

However, it wasn鈥檛 clear until now whether they were reaching the expected peak of lung growth in their early 20s.

鈥淎s they are now surviving in large numbers with modern obstetric and neonatal care, it鈥檚 important to study their breathing ability in adulthood.鈥�

Prof Doyle said general practitioners or specialist physicians should be aware that their adult patients born very preterm or with very low birthweight, particularly those who had bronchopulmonary dysplasia, were more likely to present with respiratory problems than those born at term.

鈥淧hysicians should obtain a perinatal history, including gestational age at birth, birthweight and bronchopulmonary dysplasia, when assessing adults with airway disease,鈥� he said.

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