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THURSDAY, July 26 (HealthScoutNews) -- You might not put much stock in astrology, but Scottish researchers say a woman's zodiac sign might have something to do with her risk of anorexia.
A new study says girls born in the spring and early summer have a 10 percent to 15 percent higher risk of developing anorexia than those born in other months. The findings are reported in the September issue of the International Journal of Eating Disorders.
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Anorexia nervosa afflicts 0.5 percent to 3 percent of all teen-age girls, making it one of the most common emotional disorders in that age group. Untreated, the condition leads to self-imposed starvation, even death.
The causes of anorexia aren't well understood.
In the latest study, Dr. John Eagles of the Royal Cornhill Hospital, in Aberdeen, Scotland, and his colleagues reviewed case reports for the birth months of 446 female anorexics and nearly 5,800 women without the condition.
Women born in the first half of the year were more likely to have developed the eating disorder, the researchers found. Particularly at risk were those born between March and June.
While how birth season affects anorexia risk is not clear, the researchers say maternal exposure to winter infection, especially influenza, might play a part. Seasonal changes in diet also may play a role, Eagles says, though most industrialized nations now experience little such variability.
Researchers long have suspected that schizophrenia is linked to birth season. The risk of the disease is greatest among those born in the first four months of the year, again perhaps because of maternal infection.
Eagles says while there's "no generally recognized connection" between anorexia and schizophrenia, "many people with severe anorexia nervosa have more in common with schizophrenics than neurotics. It's more like a psychosis, with the delusions about body shape and body weight," he says.
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