Study: Secondhand smoke exposure significantly increases risk of developing mouth cancer
Source: www.studyfinds.org Author: Stephen Beech, SWNS writer When most people think about the dangers of smoking, they probably consider the risks of cancer for the smoker. Although it’s common knowledge secondhand smoke is also dangerous, a new study is revealing just how devastating that exposure can be. Researchers say exposure to secondhand smoke can increase the risk of oral cancer by a staggering 51 percent. Oral cancer, or cancers of the mouth, include those affecting the lip, oral cavity, and throat. These cancers account for almost 450,000 new disease cases and more than 228,000 deaths every year globally. Scientists say that significant risk factors for these forms of cancer include tobacco smoking and use of smokeless tobacco products. Drinking alcohol can also increase the risk of oral cancer. Tobacco smoke represents the largest amount of human exposure to chemical carcinogens and causes a fifth of cancer-related deaths worldwide. However, active smokers are not the only people who suffer from these chemicals. Researchers examining data from 192 countries find 33 percent of male non-smokers, 35 percent of female non-smokers, and 40 percent of children have experienced exposure to involuntary smoking through inhaling secondhand tobacco smoke. Previous research also shows that inhaling secondhand smoke can cause several other diseases, including lung cancer. Although tobacco smoking can cause oral cancer, there is less evidence proving whether or not secondhand smoke also leads to the disease. Long-term smoke exposure doubles cancer risks A team from Britain, Portugal, Spain, and the United States evaluated the [...]