No clear associations were observed between asthma or wheezing and intake of citrus fruits, vegetables, and dairy products, but there was a link with consumption of fish and whole grain products.
“The crude prevalence of current wheeze was observed to be 19.4% in children with a low intake of both foods compared with 4.2% in children with a high intake of both foods,” Smit’s team reports. “For current asthma the crude prevalences were 16.7% and 2.8%, respectively.”
After adjustments, whole grains and fish were linked to a reduction of 54 percent and 66 percent, respectively, in the likelihood of having asthma, and similar reductions of 45 percent and 56 percent for wheezing.
The researchers recommend forward-looking studies to further clarify the relationship between dietary factors and asthma, and the possible effects of diet modifications.