[Article of Interest] Study Links Immigrating at Young Age and Higher Risk of Psychosis
By Nicholas Bakalar
A new study has found that among immigrants, younger age at the time of migration predicts a higher incidence of psychotic disorders.
The study, published last month in The American Journal of Psychiatry, was conducted from 1997 to 2005 in The Hague, Netherlands, where there are detailed records on almost everyone who has sought care for a possible psychotic disorder. The researchers found 273 immigrants, 119 second-generation citizens and 226 Dutch citizens who fit the criteria.
In four groups — people from Suriname, the Netherlands Antilles, Turkey and Morocco — the risk of psychosis was highest among those who immigrated before age 4. There was no association of psychosis with age among Western immigrants.
The researchers, led by Dr. Wim Veling of the Parnassia Psychiatric Institute, investigated various possible explanations — that social factors are involved, that people migrate because they are prone to psychosis, and that a decision to migrate is influenced by early appearance of psychosis, among others. But the correlation persisted.
“We don’t know the reason,” said Dr. Ezra Susser, the senior author and a professor of epidemiology at Columbia University, “but it might be related to early social context, which we know has an important influence on later health and mental health.”