Blood clot risk factor rated
RESEARCHERS know the absolute risk of blood clot while sitting in a cramped airline seat one in 4656.
RESEARCHERS know the absolute risk of blood clot while sitting in a cramped airline seat  one in 4656.
Dutch researchers surveyed 8755 employees of international companies that collected data on their travel.
They found risk rose as people made more flights in a short time, especially long-haul flights.
People under 30, women on birth control pills and those particularly short, tall or overweight had a special risk.