I am sure this inevitably is going to blame Asian cooking, but one important factor here is that the women surveyed were 40-70 year old. It is important, because a huge portion of these women would be first generation immigrants. That is important to know because first generation immigrants from decades ago are more likely to have a lower socioeconomic living conditions. Life in Asia with higher pollution and lower safety standards, life in America in poor neighborhoods with exposure to pollution, asbestos, and other carcinogens are all likely contributing factors.