Risk Factors: Does being born in May and in the Northern Hemisphere increase the risk of developing multiple sclerosis? Not by much. According to the data, the researchers expected 1,619 Canadians born in May from 1926 to 1970 to have multiple sclerosis. Instead, 1,675 did. For Britain those numbers were 978 vs. 1,137.
There does, however, appear to be a significant trend in relation to birth month and multiple sclerosis. The actual number of multiple sclerosis sufferers exceeded expectations in the spring and summer months ( April through July) and fell below expectation in the fall and winter (August through December). Is it the month of birth or the month of conception that's the risk factor? Children born April through July are conceived July through November, and therefore in utero during cold and flu season. It would be interesting to know if there is also a spike in the incidence of multiple sclerosis among those born in the years of bad flu outbreaks. posted by Sydney on
12/08/2004 07:43:00 AM