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Premature Birth Linked to Mental Illness in Adulthood
August 21, 2012
A recent
study
published in the
Archives of General Psychiatry
found a relationship between gestational age and various psychiatric disorders in adults. The results suggest that a concrete relationship exists between a shorter gestational period and the onset of mental illness later in life.
The study analyzed data from the medical records of 1.3 million adults born in Sweden between 1973 and 1985. Researchers analyzed multiple pregnancy outcomes including gestational age at birth, birth weight, and Apgar score; they then compared this data with information about psychiatric hospitalization in adulthood and diagnoses of bipolar disorder, depressive disorder, eating disorders, and drug/alcohol dependency.
A smaller gestational weight was associated with alcohol and drug dependency in adulthood, whereas a low Apgar score suggested an association with depressive disorder. Most strikingly, people born very premature (i.e., 32 weeks gestation) were:
2.5 times more likely to have a non-affective psychosis;
2.9 times more likely to have a depressive disorder; and
7.4 times more likely to have bipolar disorder.
Lead author Dr. Chiara Nosarti, from the Institute of Psychiatry at King’s College London, told the
BBC
, “I don’t think parents should be worried, but we know that preterm birth confers an increased vulnerability to a variety of psychiatric conditions and perhaps parents should be aware of this and monitor early signs of later more serious problems.”
Although Nosarti and her coauthors acknowledge that previous studies have found associations between preterm birth and the onset of psychiatric disorders in childhood as well as adult onset schizophrenia, they assert that this study is the first to find an association between preterm birth and adult onset of both depressive disorder and bipolar affective disorder.
“We found a very strong link between premature birth and a range of psychiatric disorders,” said Nosarti in a King’s College
press release
. “Since we considered only the most severe cases that resulted in hospitalization, it may be that in real terms this link is even stronger. However, it is important to remember that even with the increased risk, these disorders still only affect 1-6% of the population.”
What do you think? Should parents of premature infants be alerted to their children’s increased risk for mental illness later in life? PAR wants to hear from you, so leave a comment and join the conversation!
Editor’s note: This week, PAR is pleased to welcome guest blogger Grace Gardner. A recent graduate of the University of South Florida with a B.A. in Mass Communication, Grace is working as an editorial assistant this summer in the production department at PAR.
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