NEW YORK (Reuters Health) - Asthmatic children with relatively low vitamin D levels in their blood may have a greater risk of suffering severe asthma attacks than those with higher levels of the vitamin, a new study suggests.
The study, which followed more than 1,000 children with asthma for four years, found those with vitamin-D "insufficiency" at the outset were more likely to have an asthma attack that required a trip to the hospital.
Over the four-year study, 38 percent of children with insufficient vitamin D levels went to the emergency room or were hospitalized for an asthma exacerbation. The same was true of 32 percent of children with sufficient levels of the vitamin.
When the researchers considered other factors -- including the severity of the children's asthma at the study's start, their weight and their family income -- vitamin D insufficiency itself was linked to a 50 percent increase in the risk of severe asthma attacks.
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