She also found that most pesticides were associated only with allergic asthma, even though non-allergic asthma is generally more common in adults.
Asthma is a very heterogeneous disease. This finding suggests that some of the agricultural risk factors for allergic and non-allergic asthma may differ, she said.
The study also showed that some legal but rarely used compounds, such as parathion, were associated with almost a three-fold increase in allergic asthma. But even some commonly used pesticides were associated with a marked increase in allergic asthma prevalence.
Of all the compounds examined, only permethrin, a commonly used insecticide that is used in consumer items such as insect-resistant clothing to anti-malaria bed-nets, was associated with both allergic and non-allergic asthma.
Researchers say that this is the first study to examine pesticides and asthma in farm women, and it points the way for future research to clarify the relationship.
At the end of the day, you have to remember that were looking at cross-sectional data, thus we cannot establish a temporal association between pesticide use and asthma, said Dr. Hoppin.
There is a difference in asthma prevalence between women who did and did not use pesticides but whether it is causal or not remains to be seen, she added.
The study was published in the first issue for January of the American Journal of Respiratory and Critical Care Medicine, published by the American Thoracic Society.
Source-ANI
LIN/M