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  • Preterm babies at...

Preterm babies at higher risk of having asthma or COPD in adulthood

Written By : Dr. Kamal Kant Kohli Published On 2023-04-18T09:00:01+05:30  |  Updated On 18 April 2023 3:32 PM IST
Preterm babies at higher risk of having asthma or COPD in adulthood
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Norway: A nationwide register study from Finland and Norway found that preterm babies are more likely to have chronic obstructive pulmonary disease (COPD) or asthma in adulthood.

“The risk decreased gradually as gestational age increased, but individuals who were born close to term, at gestational age 37-38 weeks, had still a slightly increased risk compared to the full-term. We also observed that the risk pattern was similar for men and women. However, the risk was up to 8-fold for those with bronchopulmonary dysplasia in infancy. Bronchopulmonary dysplasia is a chronic lung disease common in the smallest preterm infants,” says Dr Anna Pulakka, the lead author from THL.

Breathing problems are among the most common problems babies born preterm have after birth. The study of over 2.6 million people from two Nordic countries shows that such problems may extend up to middle age. Asthma and COPD are the most common forms of obstructive airway disease, meaning diseases that cause difficulty in airflow out from the lungs.

Births before 37 weeks of pregnancy are counted as preterm birth. The highest risk for asthma or COPD was in individuals who were born extremely preterm, before gestational age 28 weeks. Their risk was around 3-fold compared to those born full-term at gestational age 39-41 weeks.

Professor Kari Risnes, from Norwegian University for Science and Technology NTNU explains: “Preterm birth affects lung health in many ways, and earlier studies have established that preterm birth is a risk factor for lung health in childhood. The current study shows that the risk extends at least up to middle age.”

Increased risk for asthma and COPD was independent of many factors that are related to preterm birth and asthma, such as socioeconomic status, age or asthma of the mother, prenatal disorders or mother’s smoking during pregnancy.

“Other than smoking of the mother during pregnancy, we did not have information about smoking of the people included in the study. In earlier studies we have seen that people born preterm do not smoke more than people born full-term, thus smoking is not likely to explain our results.” Anna Pulakka continues. “Smoking is still a major risk factor for asthma and especially COPD and quitting smoking is important for all.”

The research team used national birth registers of all people born in Finland during 1987-1998 and in Norway during 1967-1999. Their health records were followed up until they were at maximum 29 years old in Finland and 50 years old in Norway. During the study period, around 5% of the children both in Finland and Norway were born preterm. After 18 years of age, about 41 300 people (1.6%) had asthma and about 2 700 (0.1%) COPD.

“We only studied asthma treated in specialist care, which is why we caught only the more severe end of the disease in this study, and not all who have asthma. The low rates of COPD are additionally explained by the young age of the population in this study” says professor Eero Kajantie from THL. “Our message to health professionals is that medical history of patients presenting with respiratory symptoms should include birth conditions such as being born preterm.”

Reference:

Anna Pulakka, Kari Risnes, Johanna Metsälä, Suvi Alenius, Katriina Heikkilä, Sara Marie Nilsen, Pieta Näsänen-Gilmore, Peija Haaramo, Mika Gissler, Signe Opdahl, Eero Kajantie, European Respiratory Journal 2023; DOI: 10.1183/13993003.01763-2022.

European Respiratory Journalasthmachronic obstructive pulmonary diseasebronchopulmonary dysplasia
Source : European Respiratory Journal
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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