Women who cook on a daily basis without using a kitchen exhaust fan are nearly 1.8 times more likely to suffer from lung adenocarcinoma, a form of small-cell lung cancer, than those who do not cook, a study by the Genetic Epidemiology of Lung Cancer in Taiwan (GELAC) released yesterday showed.
The GELAC research team that conducted the study was comprised of representatives from the National Health Research Institutes (NHRI), Academia Sinica, National Taiwan University and several hospitals. They made public their findings at a two-day health forum in Taipei yesterday.
NHRI Institute of Population Sciences director Hsiung Chao (熊昭), one of the members of the team, said that nearly 90 percent of female patients with lung adenocarcinoma have never smoked, yet lung cancer has been the leading cause of cancer deaths among Taiwanese women for the past decade.
“The research team monitored the health conditions of 1,200 female lung adenocarcinoma patients and 1,200 healthy women since 2002 and found four major risk factors for lung cancer: tuberculosis, family medical history, second-hand smoke, and cooking fumes,” Hsiung said.
Hsiung said that women who have contracted tuberculosis are 2.9 times more susceptible to lung cancer, while those who have a family history of lung cancer or who have been exposed to secondhand smoke are 2.6 times and 1.5 times more likely respectively to contract the disease.
“In addition, women who have cooked three meals a day for 48 years are 1.78 times more likely to get lung cancer, but they could lower that risk by 43 percent by always having a kitchen range hood on while cooking,” Hsiung said.
National Taiwan University principal Yan Pan-chyr (楊泮池), a lung cancer expert, said that lung cancer is a multifactorial disease and that more than half of patients who develop it do not experience any symptoms in the early stages of the disease.
“Nearly 75 percent of patients with lung cancers are diagnosed at an advanced stage and less than 20 percent of them live more than five years past their diagnosis,” Yang said.
Yang said that people aged 45 and older who are at high risk of developing lung cancer are advised to undergo routine low-dose computed tomography screening, which can detect lung nodules as small as 0.2cm to 0.3cm in diameter.
“Patients who have tumors that are less than 1cm wide when diagnosed typically have a 97 percent five-year survival rate, while that survival rate drops to approximately 80 percent for those with tumors ranging between 1cm and 2cm,” Yang said.
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